摘要：
The progress of electronic technology has driven the miniaturization and integration of devices, thereby heightening interest in micro-battery research. However, the conventional methods for fabricating micro-batteries (MBs) are characterized by complexity and high cost, presenting significant challenges to their further development. In this study, we propose a novel approach for fabricating zinc-ion micro-batteries (ZIMBs) by integrating printed current collectors with electrodeposition technology. Conductive ink, formulated from a blend of various carbon materials, was employed for screen-printing the current collectors, while MnO₂ and Zn were directly electrodeposited onto their surfaces as active materials. This approach enables the fabrication of electrodes in custom shapes, eliminating the need for pre-cutting or photolithography steps, thus reducing process complexity and optimizes costs. The full battery assembled with MnO 2 deposited on the carbon-based ink film and zinc foil exhibit remarkable rate performance, high specific capacity (417 mAh/g), and good cycling stability (81.17 % capacity retention after 1000 cycles). More importantly, the fabricated micro-battery experiences less than 5 % capacity loss after repeated bending and can reliably operate for over 200 cycles, demonstrating its potential for integration with various flexible electronic devices. This work presents a novel solution for manufacturing flexible Zn//MnO 2 batteries for future electronic applications.
The progress of electronic technology has driven the miniaturization and integration of devices, thereby heightening interest in micro-battery research. However, the conventional methods for fabricating micro-batteries (MBs) are characterized by complexity and high cost, presenting significant challenges to their further development. In this study, we propose a novel approach for fabricating zinc-ion micro-batteries (ZIMBs) by integrating printed current collectors with electrodeposition technology. Conductive ink, formulated from a blend of various carbon materials, was employed for screen-printing the current collectors, while MnO₂ and Zn were directly electrodeposited onto their surfaces as active materials. This approach enables the fabrication of electrodes in custom shapes, eliminating the need for pre-cutting or photolithography steps, thus reducing process complexity and optimizes costs. The full battery assembled with MnO 2 deposited on the carbon-based ink film and zinc foil exhibit remarkable rate performance, high specific capacity (417 mAh/g), and good cycling stability (81.17 % capacity retention after 1000 cycles). More importantly, the fabricated micro-battery experiences less than 5 % capacity loss after repeated bending and can reliably operate for over 200 cycles, demonstrating its potential for integration with various flexible electronic devices. This work presents a novel solution for manufacturing flexible Zn//MnO 2 batteries for future electronic applications.
作者：
Fan-Ming Yang;Xue-Yi Long;Sheng Long;Guo-Wen He
期刊：
Journal of Industrial and Engineering Chemistry,2025年 ISSN：1226-086X
通讯作者：
Fan-Ming Yang<&wdkj&>Guo-Wen He
作者机构：
[Xue-Yi Long; Sheng Long] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China;[Fan-Ming Yang; Guo-Wen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
通讯机构：
[Fan-Ming Yang; Guo-Wen He] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000 Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000 Hunan, China
摘要：
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
N-decorated porous SCP-N-n was prepared for excellent rate charge/discharge performance. The electrochemical performance was evaluated in H 2 SO 4 electrolyte and the mechanism was researched on the basis of the physical nature, the dynamic analysis data and the calculated results of density functional theory (DFT). The results show that SCP-N-n samples are amorphous porous carbon materials with plentiful N detects. Moreover, all SCP-N-n materials are dominated by mesopores and macropores. N defects exist in the form of pyridinic N, pyrrodic N, graphitized N and oxidized N. Among these defects, graphitized N and oxidized N could strengthen the conductivity and enhance the infiltration. Moreover, pyridinic N and pyrrodic N could react with H + , resulting in the generation of pseudocapacitance. In H 2 SO 4 electrolyte, both electric double-layer capacitance (EDLC) and pseudocapacitance are important components of total capacitance. When the sweep rate is 200 mV/s, the contribution ratios of EDLC and pseudocapacitance are 56.5 % and 43.5 % for SCP-N-800. When the current density is 0.5 A/g, the specific discharge capacity and energy density are 186.9F/g and 16.6 Wh/kg, respectively. At 40 A/g, the capacitance is 62.9 % of that at 0.5 A/g. After 10,000 cycles, the capacity retention of SCP-N-800 reaches 94.1 %. The excellent electrochemical feature has a significant connection with the amorphous feature, the existence of N defects, large surface area, high void space and an appropriate aperture distribution.
摘要：
Carbon is predominantly used in zinc-ion hybrid capacitors (ZIHCs) as an electrode material. Nitrogen doping and strategic design can enhance its electrochemical properties. Melamine formaldehyde resin, serving as a hard carbon precursor, synthesizes nitrogen-doped porous carbon after annealing. Incorporating transition metal catalysts like Ni, Co, and Fe alters the morphology, pore structure, graphitization degree, and nitrogen doping types/proportions. Electrochemical tests reveal a superior capacitance of 159.5 F g−1 at a scan rate of 1 mV s−1 and rate performance in Fe-catalyzed N-doped porous carbon (Fe-NDPC). Advanced analysis shows Fe-NDPC’s high graphitic nitrogen content and graphitization degree, boosting its electric double-layer capacitance (EDLC) and pseudocapacitance. Its abundant micro- and mesopores increase the surface area fourfold compared to non-catalyzed samples, favoring EDLC and fast electrolyte transport. This study guides catalyst application in carbon materials for supercapacitors, illuminating how catalysts influence nitrogen-doped porous carbon structure and performance.
摘要：
Developing efficient strategies for the removal of organic dyes from aqueous systems remains crucial for environmental remediation. Metal-organic frameworks (MOFs), particularly UiO-66, show exceptional promise as adsorbents; however, they suffer from limited dye uptake capacity. This study addresses this limitation through strategic hybridization of UiO-66 with renewable carbohydrates (glucose and fructose), achieving enhanced performance while reducing costs. The optimized glucose/UiO-66 and fructose/UiO-66 composites demonstrated superior adsorption capacities compared to pristine UiO-66 across multiple dyes: methylene blue (76/69 mg/g), malachite green (73/67 mg/g), rhodamine B (50/59 mg/g), methyl orange (81/169 mg/g), and Congo red (99/198 mg/g). Adsorption efficiency correlated with dye molecular dimensions and the composite's phenolic hydroxyl content. Kinetic analysis revealed pseudo-second-order adsorption behavior dominated by chemisorption via electrostatic and π–π interactions. Notably, fructose-modified composites exhibited exceptional performance for anionic dyes (methyl orange and Congo red), suggesting charge-selective adsorption mechanisms. This work establishes carbohydrate-MOF hybridization as an effective strategy for designing multifunctional adsorbents, providing fundamental insights into structure-performance relationships for environmental applications.
Developing efficient strategies for the removal of organic dyes from aqueous systems remains crucial for environmental remediation. Metal-organic frameworks (MOFs), particularly UiO-66, show exceptional promise as adsorbents; however, they suffer from limited dye uptake capacity. This study addresses this limitation through strategic hybridization of UiO-66 with renewable carbohydrates (glucose and fructose), achieving enhanced performance while reducing costs. The optimized glucose/UiO-66 and fructose/UiO-66 composites demonstrated superior adsorption capacities compared to pristine UiO-66 across multiple dyes: methylene blue (76/69 mg/g), malachite green (73/67 mg/g), rhodamine B (50/59 mg/g), methyl orange (81/169 mg/g), and Congo red (99/198 mg/g). Adsorption efficiency correlated with dye molecular dimensions and the composite's phenolic hydroxyl content. Kinetic analysis revealed pseudo-second-order adsorption behavior dominated by chemisorption via electrostatic and π–π interactions. Notably, fructose-modified composites exhibited exceptional performance for anionic dyes (methyl orange and Congo red), suggesting charge-selective adsorption mechanisms. This work establishes carbohydrate-MOF hybridization as an effective strategy for designing multifunctional adsorbents, providing fundamental insights into structure-performance relationships for environmental applications.
作者机构：
[Decai Ouyang; Mengxiong Chen; Yang Fu; Heng Zou; Huiwen Xiong; Lei Zhang; Kechao Zhou] State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China;[Dan Xie] College of Materials and Chemical Engineering, Hunan City University, Yiyang, Hunan, 413000, China
通讯机构：
[Huiwen Xiong] S;State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China
摘要：
This study investigates the interfacial behavior between high-entropy (TiNbTaWMo)C carbides and transition metal systems to develop advanced high-entropy cermets. The wettability characteristics of pure metals (Co, Fe, Ni) and a CoCrNiFeMn binder system were systematically examined through high-temperature sintering. Among these, Co and CoCrNiFeMn displayed superior wettability, forming interfacial reaction layers measuring 710 μm and 484 μm in thickness, respectively. Microstructural characterization revealed the precipitation of (W, Mo)C sub-carbides and carbon-deficient transition phases at carbide/binder interfaces, governed by a dissolution-precipitation mechanism. Based on these interfacial findings, two high-entropy cermets - (TiNbTaWMo)C-Co and (TiNbTaWMo)C-CoCrNiFeMn - were fabricated at 1450 °C. The resulting materials achieved near-theoretical densities (97 %) with homogeneous microstructure. Remarkably, the (TiNbTaWMo)C-Co cermet demonstrated synergistic mechanical properties: flexural strength of 900.9 ± 9.8 MPa, fracture toughness of 9.8 ± 0.5 MPa m 0.5 , and Vickers hardness of 1481.7 ± 20.4 N/mm 2 . These results establish a microstructure-property correlation framework for the design of high-entropy cermets.
This study investigates the interfacial behavior between high-entropy (TiNbTaWMo)C carbides and transition metal systems to develop advanced high-entropy cermets. The wettability characteristics of pure metals (Co, Fe, Ni) and a CoCrNiFeMn binder system were systematically examined through high-temperature sintering. Among these, Co and CoCrNiFeMn displayed superior wettability, forming interfacial reaction layers measuring 710 μm and 484 μm in thickness, respectively. Microstructural characterization revealed the precipitation of (W, Mo)C sub-carbides and carbon-deficient transition phases at carbide/binder interfaces, governed by a dissolution-precipitation mechanism. Based on these interfacial findings, two high-entropy cermets - (TiNbTaWMo)C-Co and (TiNbTaWMo)C-CoCrNiFeMn - were fabricated at 1450 °C. The resulting materials achieved near-theoretical densities (97 %) with homogeneous microstructure. Remarkably, the (TiNbTaWMo)C-Co cermet demonstrated synergistic mechanical properties: flexural strength of 900.9 ± 9.8 MPa, fracture toughness of 9.8 ± 0.5 MPa m 0.5 , and Vickers hardness of 1481.7 ± 20.4 N/mm 2 . These results establish a microstructure-property correlation framework for the design of high-entropy cermets.
期刊：
Chemical Engineering Journal,2025年521:166845 ISSN：1385-8947
通讯作者：
Zhong, S;He, GW
作者机构：
[Chen, Siyi; Li, Yun; Chen, Ping; Zhong, Shian; Tang, Yalan; Gong, Zan; Xiao, Liuyue; Yang, Yanjing] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;[He, Guowen] Hunan City Univ, Coll Mat & Chem Engn, Coll Hunan Prov, Key Lab low carbon & Environm funct Mat, Yiyang 413000, Peoples R China.;[Zhong, Shian] Changsha Med Univ, Hunan Prov Key Lab Res & Dev Novel Pharmaceut Prep, Double Class Applicat Characterist Discipline Huna, Changsha 410219, Peoples R China.
通讯机构：
[Zhong, S ] C;[He, GW ] H;Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China.;Hunan City Univ, Coll Mat & Chem Engn, Coll Hunan Prov, Key Lab low carbon & Environm funct Mat, Yiyang 413000, Peoples R China.;Changsha Med Univ, Hunan Prov Key Lab Res & Dev Novel Pharmaceut Prep, Double Class Applicat Characterist Discipline Huna, Changsha 410219, Peoples R China.
关键词：
Single atom catalysts;3D electrocatalytic system;Singlet oxygen;Sulfanilamide;Peroxymonosulfate
摘要：
Sulfanilamide (SN), characterized by its structural stability and resistance in natural degradation, has emerged as a persistent organic pollutant of great concern in aquatic environments. To address the challenge of efficiently removing high concentrations of SN, this study developed a three-dimensional catalytic degradation system (Mo SACs -CoCO 3 /3D-EC/PMS). In this system, single-atom molybdenum (Mo) not only serves as a highly active catalytic center but also enhances the synergistic effect of the support through electronic modulation. Under the influence of an external electric field, the system effectively activated peroxymonosulfate (PMS) to generate singlet oxygen ( 1 O 2 ), thereby enabling a dual-pathway degradation process characterized by non-radical-dominated and radical-assisted. The optimal conditions of degradation were determined by optimizing the parameters such as catalyst dosage, initial pH, current density. The degradation rate of 40 mg/L SN reached 96.88 % in 60 min. Comprehensive toxicity evaluations, including Cell Counting Kit-8 (CCK-8) assays, zebrafish embryo development, wheat germination, and Escherichia coli ( E. coli ) viability tests, confirmed the excellent environmental safety of both the catalyst and its degradation products.
Sulfanilamide (SN), characterized by its structural stability and resistance in natural degradation, has emerged as a persistent organic pollutant of great concern in aquatic environments. To address the challenge of efficiently removing high concentrations of SN, this study developed a three-dimensional catalytic degradation system (Mo SACs -CoCO 3 /3D-EC/PMS). In this system, single-atom molybdenum (Mo) not only serves as a highly active catalytic center but also enhances the synergistic effect of the support through electronic modulation. Under the influence of an external electric field, the system effectively activated peroxymonosulfate (PMS) to generate singlet oxygen ( 1 O 2 ), thereby enabling a dual-pathway degradation process characterized by non-radical-dominated and radical-assisted. The optimal conditions of degradation were determined by optimizing the parameters such as catalyst dosage, initial pH, current density. The degradation rate of 40 mg/L SN reached 96.88 % in 60 min. Comprehensive toxicity evaluations, including Cell Counting Kit-8 (CCK-8) assays, zebrafish embryo development, wheat germination, and Escherichia coli ( E. coli ) viability tests, confirmed the excellent environmental safety of both the catalyst and its degradation products.
作者：
Lide Yang;Jiacheng Liang;Zheng Liu;Jianmin Yuan;Guowen He
期刊：
Journal of Applied Polymer Science,2025年142(24):e57010 ISSN：0021-8995
通讯作者：
Jianmin Yuan<&wdkj&>Guowen He
作者机构：
College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China;[Jianmin Yuan] College of Materials Science and Engineering, Hunan University, Changsha, China;[Lide Yang; Jiacheng Liang; Zheng Liu; Guowen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China
通讯机构：
[Jianmin Yuan; Guowen He] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang, People's Republic of China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang, People's Republic of China<&wdkj&>College of Materials Science and Engineering, Hunan University, Changsha, China
关键词：
graphene and fullerenes;membranes;nanotubes;surfaces and interfaces
摘要：
The exploitation, transportation, and utilization of various oil products frequently generate substantial volumes of oily wastewater, making the development of efficient treatment methods imperative for addressing environmental pollution and water scarcity. In this study, sodium hypochlorite was first employed to oxidize and etch the surface of the nylon mesh separation membrane (NFM), resulting in a modified NFM (M-NFM) characterized by a unique honeycomb-like porous structure and an abundance of oxygen-containing functional groups. Subsequently, a hydrophilic and positively charged UiO-66-NH 2 particle layer is in situ synthesized on the NFM surface, capitalizing on the abundant nucleation sites offered by carboxyl groups within the honeycomb framework, yielding the composite membrane of M-NFM/UiO-66-NH 2 (M-NFMU). To further enhance the oil–water separation performance of this composite membrane, surface-functionalized cellulose nanocrystals (SF-CNC) and graphene oxide (GO) were sequentially adsorbed onto the surface of the M-NFMU membrane through a synergetic self-assembly strategy. This process led to the formation of a hierarchical micro-nano structure on the surface of the NFM, ultimately producing a composite membrane designated as M-NFM@UiO-66-NH 2 /SF-CNC/GO (M-NFMUCG). During the oil–water separation process, water molecules engage in hydrogen-bonding interactions with the amine, carboxyl, and hydroxyl functional groups present in the UiO-66-NH 2 , SF-CNC, and GO structures. This interaction effectively captures and stabilizes a water film on the surface of the M-NFMUCG membrane, preventing oil from coming into contact with it. As a result, the M-NFMUCG exhibits remarkable superhydrophilicity, exceptional oil resistance, and outstanding oil–water separation performance, achieving a permeate flux of up to 16,361 L m 2 h −1 and an oil rejection rate exceeding 99.9% under gravity. Moreover, the M-NFMUCG membranes exhibit excellent chemical stability and remarkable salt resistance, underscoring their significant potential for the treatment of oily wastewater.
期刊：
International Journal of Reasoning-based Intelligent Systems,2025年16(6):417-426 ISSN：1755-0556
作者机构：
[Wenzhen Ku] College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000, Hunan, China;[Xiyang Li] College of Fine Arts and Design, Hunan City University, Yiyang, 413000, Hunan, China
关键词：
fine arts and traditional Chinese painting works;image colour;pixel level;wavelet transform algorithm;high frequency component;Markov chain.
摘要：
Aiming at the problems of low colour correction accuracy and large colour space decomposition error in colour correction of fine arts and traditional Chinese painting works, a colour correction method based on colour space decomposition is designed. First, the linear weighting algorithm is used to fuse the colour pixel level of the fine arts and traditional Chinese painting image. The wavelet transform algorithm is introduced to complete the extraction of colour features, and then the colour features are pre-processed. Finally, the state of colour space is determined, through the decomposition of row and column pixels in colour space, the deviation probability with Markov chain is calculated, and colour correction research through the determination of state function is realised. The results show that the proposed method can improve the accuracy of colour correction of fine arts and traditional Chinese painting images, and the colour space decomposition error is low.
摘要：
Porous carbons with plentiful nitrogen and phosphorus heteroatoms (CMs-N/P-n) derived from rice hull powder and melamine polyphosphate are synthesized for superior charge/discharge performance. In the amorphous CMs-N/P-n materials, a part of carbon atoms are graphitized, and the I D /I G ratios are 1.09, 1.00, and 0.99. In CMs-N/P-n, N heteroatoms are dominated by pyridinic and pyrrodic N forms and P species dispersed in the skeleton as P C, P O, and PO species. In 6 M KOH, the optimized CMs-N/P-850 demonstrates a conspicuous specific discharge capacity that is composed of a remarkable pseudocapacitance and a double-layer capacitance (EDLC). At 0.5 A g −1 , the discharge value is 593.1 F g −1 . Under 20 A g −1 , the capacitance still remains 46.2%. The superior capacitive characteristics are closely linked with the high cavity space, unique aperture distribution, and co-action of N and P species, which are favorable conditions for the accommodation and fast migration of OH − , and the generation of pseudocapacitance.
摘要：
In this work, Cu-based metal-organic framework material (Cu-MOF) was combined with an electric field to construct a three-dimensional electrocatalytic synergistic activation of peroxymonosulfate sulfate (PMS) system (3D/Cu-MOF/EC/PMS) for the degradation of norfloxacin (NOR). The results show that the synergistic degradation efficiency of the Cu-MOF material with the electric field is enhanced by nearly 64 % relative to the degradation efficiency of the two alone. The quenching experimental and EPR characterization indicates that ROS plays an important role in the degradation process, with center dot O2- playing a dominant role. Finally, the degradation pathway of NOR was explored by DFT study and LC-MS tests, and the toxicity evaluation software (TEST) and CCK-8 cytotoxicity experimental studies demonstrated that the sewage after the degradation of NOR by this system would have little or no effect on human liver cells (L02). This study not only shows that the 3D/Cu-MOF/ EC/PMS system can treat the water containing higher concentrations of NOR into a state that is not harmful to the human body but also provides a new idea for the improvement of catalysts that do not have obvious catalytic degradation effects.
摘要：
In the contribution, a novel chemometric coupling technique combined with high-performance liquid chromatography with diode array detector (HPLC-DAD) was developed for the rapid quantification and source apportionment of eight monoaromatic hydrocarbons (MACHs) in soil samples. The strategy was built on the three-dimensional calibration based on alternating trilinear decomposition coupling with the unsupervised classification using t-distributed stochastic neighbor embedding (named ATLD-t-SNE). Firstly, a validation set and a spiked soil set were used to investigate the quantitative performance of the developed method. The obtained average recoveries of eight MACHs in soil samples were between (95.0 ± 4.4)% and (111.9 ± 3.3)%, and the limits of detection ranged from 0.0041μg mL −1 to 1.85 μg mL −1 , which were better than the results of parallel factor analysis-alternating least squares (PARAFAC-ALS). Subsequently, the proposed approach was applied to analyze actual soil samples collected from tea plantations (7 samples) and industrial areas (60 samples), revealing the presence of ethylbenzene (EBZ) and (1,3,5)-trimethylbenzene (MTY) in both types of soil samples, could the absence of other six MACHs. Finally, ATLD-t-SNE was utilized to classify these soil samples and a comparison between the new strategy and ATLD combined with feature component analysis as well as principal component analysis (called ATLD-FCA and ATLD-PCA, respectively) was made. The finding indicated that ATLD-t-SNE provided better clustering than other two methods, indicating different sources of organic pollution of MACHs in soil samples.
In the contribution, a novel chemometric coupling technique combined with high-performance liquid chromatography with diode array detector (HPLC-DAD) was developed for the rapid quantification and source apportionment of eight monoaromatic hydrocarbons (MACHs) in soil samples. The strategy was built on the three-dimensional calibration based on alternating trilinear decomposition coupling with the unsupervised classification using t-distributed stochastic neighbor embedding (named ATLD-t-SNE). Firstly, a validation set and a spiked soil set were used to investigate the quantitative performance of the developed method. The obtained average recoveries of eight MACHs in soil samples were between (95.0 ± 4.4)% and (111.9 ± 3.3)%, and the limits of detection ranged from 0.0041μg mL −1 to 1.85 μg mL −1 , which were better than the results of parallel factor analysis-alternating least squares (PARAFAC-ALS). Subsequently, the proposed approach was applied to analyze actual soil samples collected from tea plantations (7 samples) and industrial areas (60 samples), revealing the presence of ethylbenzene (EBZ) and (1,3,5)-trimethylbenzene (MTY) in both types of soil samples, could the absence of other six MACHs. Finally, ATLD-t-SNE was utilized to classify these soil samples and a comparison between the new strategy and ATLD combined with feature component analysis as well as principal component analysis (called ATLD-FCA and ATLD-PCA, respectively) was made. The finding indicated that ATLD-t-SNE provided better clustering than other two methods, indicating different sources of organic pollution of MACHs in soil samples.
期刊：
Journal of Applied Polymer Science,2025年:e57977 ISSN：0021-8995
通讯作者：
Xiao, GQ
作者机构：
[Meng, Qiudong; Xiao, Guqing] Hunan City Univ, Coll Mat & Chem Engn, Yiyang, Hunan, Peoples R China.;[Meng, Qiudong; Xiao, Guqing] Key Lab Low Carbon & Environm Funct Mat Coll Hunan, Yiyang, Hunan, Peoples R China.
通讯机构：
[Xiao, GQ ] H;Hunan City Univ, Coll Mat & Chem Engn, Yiyang, Hunan, Peoples R China.;Key Lab Low Carbon & Environm Funct Mat Coll Hunan, Yiyang, Hunan, Peoples R China.
关键词：
adsorption;porous materials;resins
摘要：
2,4-Dichlorophenoxyacetic acid (2,4-D) is a common pesticide, which is often detected in groundwater and surface water. Half of the benzyl chloride in chloromethylpolystyrene was formed the hypercrosslinked pore structure, while the other half was functionalized by 3-aminopyridine to tailor the macroporous structure. This double pore structure adsorbent (JX-02) was fabricated to investigate its adsorption performance for 2,4-D. The micropore area of JX-02 accounted for 54.04%. At pH 2.97 (without pH adjustment) and 298 K, the maximum adsorption capacity of 2,4-D on JX-02 is 370.4 mg/g, exceeding the corresponding adsorption capacities of the referred macroporous XAD-4 and the hypercrosslinked adsorbent. The adsorption of 2,4-D on JX-02 conformed to the pseudo-first-order equation, Langmuir equation, and Temkin equation. JX-02 exhibited a maximum absorptive capacity of 540.5 mg/g for 2,4-D at 298 K, which was larger or comparable to 18 adsorbents in the literature. The adsorption of 2,4-D on JX-02 was spontaneous and endothermic. Corresponding to its double pore structure, JX-02 demonstrated a synergistic multiple adsorption mechanism for 2,4-D, including micropore filling, hydrophobic interaction, π – π interaction, and anion exchange. JX-02 could be regenerated with the binary complex of 3% NaCl-60% C 2 H 5 OH. Five adsorption–regeneration cycles exhibited constant adsorption capacities of 367.7–372.4 mg/g for 2,4-D on JX-02.
作者机构：
[Xiangdong Qing; Xinran Wu; Taoxiang Wang; Zhiyuan Hu; Xiaohong Zhou; Rong An] Hunan Provincial Key Laboratory of Dark Tea and Jin-hua, College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China;[Xiaohua Zhang] Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, PR China;[Jie Luan] Hygienic Physicochemical Center, Yunnan Center for Disease Control and Prevention, Kunming 650022, PR China
通讯机构：
[Xiangdong Qing] H;Hunan Provincial Key Laboratory of Dark Tea and Jin-hua, College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, PR China
摘要：
In the work, a novel strategy was developed to characterize and classify Chinese dark tea based on alternating trilinear decomposition combined with uniform manifold approximation and projection (ATLD-UMAP). Firstly, nine active components as targeted analytes were selected to construct qualitative and quantitative models to investigate the performance of ATLD-UMAP analysis of 3D fluorescence data. Spiked sample sets demonstrated that satisfactory results were returned with their average recoveries ranging from (91.4 ± 9.7)% to (109.3 ± 1.5)%. Subsequently, ATLD-UMAP was employed to analyze the contents of analytes in 124 real dark tea samples, revealing the presence of eight active components other than tryptophan with their average contents ranging from 0.22 mg·g −1 to 57.69 mg·g −1 . Finally, ATLD-UMAP was applied to discriminate tea samples produced from different geographical origins and processing depths, and compared with the targeted-based feature component analysis (ATLD-FCA) and the nontargeted-based principal component analysis (ATLD-PCA). The research findings demonstrated that ATLD-UMAP achieved satisfactory classification results (100.0 % accuracy, sensitivity and specificity) in simultaneously identifying dark tea's geographical origin and processing depth. In contrast, ATLD-FCA and ATLD-PCA failed to distinguish them accurately with accuracies of only 68.5 % and 64.8 %, respectively. In a word, ATLD-UMAP provides a new method for rapid authenticity identification in the dark tea industry.
In the work, a novel strategy was developed to characterize and classify Chinese dark tea based on alternating trilinear decomposition combined with uniform manifold approximation and projection (ATLD-UMAP). Firstly, nine active components as targeted analytes were selected to construct qualitative and quantitative models to investigate the performance of ATLD-UMAP analysis of 3D fluorescence data. Spiked sample sets demonstrated that satisfactory results were returned with their average recoveries ranging from (91.4 ± 9.7)% to (109.3 ± 1.5)%. Subsequently, ATLD-UMAP was employed to analyze the contents of analytes in 124 real dark tea samples, revealing the presence of eight active components other than tryptophan with their average contents ranging from 0.22 mg·g −1 to 57.69 mg·g −1 . Finally, ATLD-UMAP was applied to discriminate tea samples produced from different geographical origins and processing depths, and compared with the targeted-based feature component analysis (ATLD-FCA) and the nontargeted-based principal component analysis (ATLD-PCA). The research findings demonstrated that ATLD-UMAP achieved satisfactory classification results (100.0 % accuracy, sensitivity and specificity) in simultaneously identifying dark tea's geographical origin and processing depth. In contrast, ATLD-FCA and ATLD-PCA failed to distinguish them accurately with accuracies of only 68.5 % and 64.8 %, respectively. In a word, ATLD-UMAP provides a new method for rapid authenticity identification in the dark tea industry.
作者机构：
College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China;Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China;[Yongshuang Hu; Guqing Xiao; Yi Sun; Qiudong Meng] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China
通讯机构：
[Guqing Xiao] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key Laboratory of Low Carbon and Environmental Functional Materials of College of Hunan Province, Yiyang 413000, Hunan, China
摘要：
Glyphosate, the most widespread organophosphorus herbicide, enters lakes, rivers and groundwater through rainwater and surface runoff. It is very important to remove glyphosate from neutral water bodies. A new strategy for the development of glyphosate adsorbent was implemented through in situ nanoconfinement of hydrated ferric oxide (Fe 2 O 3 ·nH 2 O) in an anion exchange resin D201 (D201/Fe 2 O 3 ·nH 2 O). Fe 2 O 3 ·nH 2 O was confined within the 12–140 nm pores of D201/Fe 2 O 3 ·nH 2 O, exhibiting uniform distribution, nanoscale and amorphous state. Benefiting from the cross-linked polystyrene network, D201/Fe 2 O 3 ·nH 2 O featured excellent chemical stability in weakly acidic (pH > 3), alkaline and salt solutions. Compared with its host D201, D201/Fe 2 O 3 ·nH 2 O exhibited larger rate constant k 1 , larger glyphosate capacity and superior selectivity at pH = 7.0 ± 0.05. Corresponding its bifunctional groups of -N + (CH 3 ) 3 and Fe 2 O 3 ·nH 2 O, D201/Fe 2 O 3 ·nH 2 O could adsorb glyphosate through the two mechanisms of the ligand exchange between glyphosate anion and hydroxyl group, as well as the anion exchange between Cl − and glyphosate anion. D201/Fe 2 O 3 ·nH 2 O showed the commendable reusability and maintained constant glyphosate adsorption capacities at 161.5–164.5 mg/g in five consecutive adsorption-regeneration cycles. At the injection glyphosate concentration of 1.1 mg/mL, the effective processing volumes of D201/Fe 2 O 3 ·nH 2 O were 3.81 and 3.21 times that of D201 at two breakthrough points.
Glyphosate, the most widespread organophosphorus herbicide, enters lakes, rivers and groundwater through rainwater and surface runoff. It is very important to remove glyphosate from neutral water bodies. A new strategy for the development of glyphosate adsorbent was implemented through in situ nanoconfinement of hydrated ferric oxide (Fe 2 O 3 ·nH 2 O) in an anion exchange resin D201 (D201/Fe 2 O 3 ·nH 2 O). Fe 2 O 3 ·nH 2 O was confined within the 12–140 nm pores of D201/Fe 2 O 3 ·nH 2 O, exhibiting uniform distribution, nanoscale and amorphous state. Benefiting from the cross-linked polystyrene network, D201/Fe 2 O 3 ·nH 2 O featured excellent chemical stability in weakly acidic (pH > 3), alkaline and salt solutions. Compared with its host D201, D201/Fe 2 O 3 ·nH 2 O exhibited larger rate constant k 1 , larger glyphosate capacity and superior selectivity at pH = 7.0 ± 0.05. Corresponding its bifunctional groups of -N + (CH 3 ) 3 and Fe 2 O 3 ·nH 2 O, D201/Fe 2 O 3 ·nH 2 O could adsorb glyphosate through the two mechanisms of the ligand exchange between glyphosate anion and hydroxyl group, as well as the anion exchange between Cl − and glyphosate anion. D201/Fe 2 O 3 ·nH 2 O showed the commendable reusability and maintained constant glyphosate adsorption capacities at 161.5–164.5 mg/g in five consecutive adsorption-regeneration cycles. At the injection glyphosate concentration of 1.1 mg/mL, the effective processing volumes of D201/Fe 2 O 3 ·nH 2 O were 3.81 and 3.21 times that of D201 at two breakthrough points.
期刊：
Journal of Electroanalytical Chemistry,2025年:119481 ISSN：1572-6657
通讯作者：
Fan-Ming Yang
作者机构：
[Jia-Hong Chen] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China;Key laboratory of low carbon and environmental functional materials of college of Hunan province, Yiyang 413000, Hunan, China;[Fan-Ming Yang; Guo-Wen He] College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key laboratory of low carbon and environmental functional materials of college of Hunan province, Yiyang 413000, Hunan, China
通讯机构：
[Fan-Ming Yang] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang 413000, Hunan, China<&wdkj&>Key laboratory of low carbon and environmental functional materials of college of Hunan province, Yiyang 413000, Hunan, China
摘要：
In this investigation, PANI/Co 3 O 4 composite material with good rate charge/discharge capability was prepared through chemical grafting polyaniline (PANI) on the surface of homogeneous nucleated Co 3 O 4 . he physical properties were characterized by XRD, IR, XPS, SEM, EDS and N 2 adsorption/desorption measurements. The charge/discharge performance was evaluated in 6 M KOH electrolyte using a symmetrical two-electrode configuration. The results show that Co 3 O 4 has a face-centered cubic crystal structure with both Co 2+ and Co 3+ ions present in its lattice. After the modification, PANI particles covered the surface of Co 3 O 4 . Furthermore, PANI was bonded to Co 3 O 4 via coordination and hydrogen bonds. Compared with Co 3 O 4 , the PANI/Co 3 O 4 composite exhibits a 5.2 % increase in N content. Moreover, N atoms exist in PANI/Co 3 O 4 as - NH + · -, -NH- and = N- species. The PANI/Co 3 O 4 composite has a specific surface area of 22 m 2 /g and a pore volume of 0.129 cm 3 /g, which are 1.57 times and 1.79 times those of pure Co 3 O 4 , respectively. In KOH electrolyte, the electrochemical behavior of PANI/Co 3 O 4 is dominated by both surface control and ion diffusion processes. At a scan rate of 200 mV/s, the pseudocapacitive contribution of PANI/Co 3 O 4 reaches 79.5 %, which is 3.2 % higher than that of Co 3 O 4 . Compared with Co 3 O 4 , PANI/Co 3 O 4 displays a good rate charge/discharge performance. At 0.1 A/g, the energy density of PANI/Co 3 O 4 is 6.7 Wh/kg. When the current density is enhanced to 5 A/g, the energy density retention is 43.4 %. This value is 1.18 times that of Co 3 O 4 , which is closely associated with the improved pore structure and the connection type between PANI and Co 3 O 4 .
In this investigation, PANI/Co 3 O 4 composite material with good rate charge/discharge capability was prepared through chemical grafting polyaniline (PANI) on the surface of homogeneous nucleated Co 3 O 4 . he physical properties were characterized by XRD, IR, XPS, SEM, EDS and N 2 adsorption/desorption measurements. The charge/discharge performance was evaluated in 6 M KOH electrolyte using a symmetrical two-electrode configuration. The results show that Co 3 O 4 has a face-centered cubic crystal structure with both Co 2+ and Co 3+ ions present in its lattice. After the modification, PANI particles covered the surface of Co 3 O 4 . Furthermore, PANI was bonded to Co 3 O 4 via coordination and hydrogen bonds. Compared with Co 3 O 4 , the PANI/Co 3 O 4 composite exhibits a 5.2 % increase in N content. Moreover, N atoms exist in PANI/Co 3 O 4 as - NH + · -, -NH- and = N- species. The PANI/Co 3 O 4 composite has a specific surface area of 22 m 2 /g and a pore volume of 0.129 cm 3 /g, which are 1.57 times and 1.79 times those of pure Co 3 O 4 , respectively. In KOH electrolyte, the electrochemical behavior of PANI/Co 3 O 4 is dominated by both surface control and ion diffusion processes. At a scan rate of 200 mV/s, the pseudocapacitive contribution of PANI/Co 3 O 4 reaches 79.5 %, which is 3.2 % higher than that of Co 3 O 4 . Compared with Co 3 O 4 , PANI/Co 3 O 4 displays a good rate charge/discharge performance. At 0.1 A/g, the energy density of PANI/Co 3 O 4 is 6.7 Wh/kg. When the current density is enhanced to 5 A/g, the energy density retention is 43.4 %. This value is 1.18 times that of Co 3 O 4 , which is closely associated with the improved pore structure and the connection type between PANI and Co 3 O 4 .
摘要：
For achieving cost-effectiveness, the utilization of printable carbon-based conductive inks has emerged as a critical driver for the industrial advancement of flexible micro-supercapacitors (MSCs). However, the commercial application of carbon-based conductive ink is still limited by their low electrical conductivity and capacitance, attributed to the limited conductive pathways and pore structures resulting from the stacking of conductive materials. Herein, a carbon-based composite aqueous ink based on graphene, multi-walled carbon nanotubes, and conductive carbon black (GMC) is developed for scalable screen printing of MSCs. The integration of these carbon components forms a three-dimensional porous conductive network with exceptional flexibility. This network not only enhances electron transfer pathways but also increases the accessible surface area for electrolyte ions. Thanks to these advantages, the GMC-MSCs deliver high conductivity (10,843.62 S m −1 ), excellent energy storage performance (an areal capacitance of 12.94 mF cm −2 at a current density of 0.02 mA cm −2 ), and stable cycling life (102.4 % capacitance retention after 10,000 cycles). Furthermore, these devices exhibit outstanding flexibility with 150 % capacity retention after 9000 bending cycles, thus paving the way for the widespread application of flexible MSCs.
For achieving cost-effectiveness, the utilization of printable carbon-based conductive inks has emerged as a critical driver for the industrial advancement of flexible micro-supercapacitors (MSCs). However, the commercial application of carbon-based conductive ink is still limited by their low electrical conductivity and capacitance, attributed to the limited conductive pathways and pore structures resulting from the stacking of conductive materials. Herein, a carbon-based composite aqueous ink based on graphene, multi-walled carbon nanotubes, and conductive carbon black (GMC) is developed for scalable screen printing of MSCs. The integration of these carbon components forms a three-dimensional porous conductive network with exceptional flexibility. This network not only enhances electron transfer pathways but also increases the accessible surface area for electrolyte ions. Thanks to these advantages, the GMC-MSCs deliver high conductivity (10,843.62 S m −1 ), excellent energy storage performance (an areal capacitance of 12.94 mF cm −2 at a current density of 0.02 mA cm −2 ), and stable cycling life (102.4 % capacitance retention after 10,000 cycles). Furthermore, these devices exhibit outstanding flexibility with 150 % capacity retention after 9000 bending cycles, thus paving the way for the widespread application of flexible MSCs.
期刊：
Asian Journal of Organic Chemistry,2025年:e70240 ISSN：2193-5807
通讯作者：
Saiwen Liu
作者机构：
[Hong Xiao] College of Chemistry, Xiangtan University, Xiangtan, 411105 P. R. China;[Saiwen Liu; Zhihong Yin] College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000 P. R. China
通讯机构：
[Saiwen Liu] C;College of Materials and Chemical Engineering, Hunan City University, Yiyang, 413000 P. R. China
关键词：
Benzofused ketones;C─S bond formation;Iron-catalyzed;Multicomponent reactions;Sulfonylmethylation
摘要：
An efficient iron‐catalyzed C─H bond functionalization strategy has been developed for the direct sulfonylmethylation of benzofused ketones. This three‐component reaction employs sodium sulfinates as the sulfonyl source and dimethylacetamide (DMA) as a versatile one‐carbon synthon, enabling concurrent construction of C─C and C─S bonds. The protocol demonstrates broad functional group tolerance and proceeds under oxidative conditions using FeCl 3 and K 2 S 2 O₈. A variety of α‐tetralones, 1‐indanones, and related substrates were transformed into the corresponding α‐sulfonylmethylated derivatives in moderate to good yields. Mechanistic studies suggest a radical pathway involving a key 2‐methylidenecycloalkan‐1‐one intermediate, offering a practical and step‐economical route to sulfone‐containing scaffolds.
An efficient iron‐catalyzed C─H bond functionalization strategy has been developed for the direct sulfonylmethylation of benzofused ketones. This three‐component reaction employs sodium sulfinates as the sulfonyl source and dimethylacetamide (DMA) as a versatile one‐carbon synthon, enabling concurrent construction of C─C and C─S bonds. The protocol demonstrates broad functional group tolerance and proceeds under oxidative conditions using FeCl 3 and K 2 S 2 O₈. A variety of α‐tetralones, 1‐indanones, and related substrates were transformed into the corresponding α‐sulfonylmethylated derivatives in moderate to good yields. Mechanistic studies suggest a radical pathway involving a key 2‐methylidenecycloalkan‐1‐one intermediate, offering a practical and step‐economical route to sulfone‐containing scaffolds.
摘要：
The design and development of new precious metal recovery adsorbents have significant socio-economic benefits; this study successfully synthesized a high-performance gold ion adsorbent, UiO-66-TMB, by modifying UiO-66-NH₂ with thiosemicarbazide, a common industrial chemical rich in amino and thiol groups. The obtained material exhibits excellent stability and adsorption performance, with the maximum adsorption capacity of 729.15 mg·g −1 at pH = 2. The adsorbent has good recyclability and can maintain superior selectivity in environments containing multiple impurity ions. In addition, even under strong acidic conditions with low initial gold ion concentration, a saturated adsorption capacity of 705.6 mg·g −1 can be maintained. Mechanism studies have shown that there is a synergistic effect between electrostatic attraction, coordination binding, and redox reactions between Au and functional groups containing N and S elements on the surface of materials. The functionalization strategy proposed in this work opens new research directions for developing efficient and stable precious metal adsorption materials, offering a potential solution for sustainable resource recovery from industrial wastewater and electronic waste.
The design and development of new precious metal recovery adsorbents have significant socio-economic benefits; this study successfully synthesized a high-performance gold ion adsorbent, UiO-66-TMB, by modifying UiO-66-NH₂ with thiosemicarbazide, a common industrial chemical rich in amino and thiol groups. The obtained material exhibits excellent stability and adsorption performance, with the maximum adsorption capacity of 729.15 mg·g −1 at pH = 2. The adsorbent has good recyclability and can maintain superior selectivity in environments containing multiple impurity ions. In addition, even under strong acidic conditions with low initial gold ion concentration, a saturated adsorption capacity of 705.6 mg·g −1 can be maintained. Mechanism studies have shown that there is a synergistic effect between electrostatic attraction, coordination binding, and redox reactions between Au and functional groups containing N and S elements on the surface of materials. The functionalization strategy proposed in this work opens new research directions for developing efficient and stable precious metal adsorption materials, offering a potential solution for sustainable resource recovery from industrial wastewater and electronic waste.
摘要：
To address key trade-offs in carbon-based composites—conductivity vs. dispersibility, flexibility vs. high filler loading—a double-filled polyvinyl alcohol composite (PVAC) film was developed. Integrate sodium hypochlorite-oxidized multi-walled carbon nanotubes (O-MWCNTs) and reduced graphene oxide (rGO) into a PVA matrix via vacuum-induced self-assembly and thermal-pressure lamination. A green hypochlorous acid oxidation strategy endows O-MWCNT with GO-like water dispersibility while preserving reducibility, overcoming the dispersion-conductivity trade-off. Oxygen functional groups on O-MWCNTs enhance dispersion and act as dynamic anchors for PVA chains, promoting long-range polymer interlinking (rather than confinement) to maintain flexibility—retaining over 96 % thermal conductivity (k) after 1000 folding cycles. Scanning electron microscopy confirmed the formation of continuous 3D nano-carbon networks, where O-MWCNTs act as vertical interconnects bridging the rGO nanosheets, establishing continuous conductive and heat conduction pathways. PVA chains form an elastic “web” around functionalized fillers, with hydrogen bonds between hydroxyl groups (-OH) of PVA and oxygen moieties (-COOH, -C=O) on nanocarbons enabling stress redistribution. At a rGO:O-MWCNT ratio (4:6) and 70 wt% filler loading, the films exhibit superhigh in-plane/through-plane electrical (3007.5/721.5 S/m) and thermal (67.7/11.5 W/m·K) conductivities. Notably, they maintain ∼7.8 % elongation at break, defying the rigidity-conductivity trade-off, thanks to oxygen-mediated interfaces where sacrificial hydrogen bonds dissipate strain while preserving conductive networks. This dual-filler design leverages rGO (lateral conduction) and O-MWCNTs (vertical bridges) to overcome conductivity anisotropy. The films' exceptional electrical-thermal-mechanical performance, paired with scalable fabrication, positions them as a transformative platform for flexible electronics, thermal interface materials, and energy storage systems.
To address key trade-offs in carbon-based composites—conductivity vs. dispersibility, flexibility vs. high filler loading—a double-filled polyvinyl alcohol composite (PVAC) film was developed. Integrate sodium hypochlorite-oxidized multi-walled carbon nanotubes (O-MWCNTs) and reduced graphene oxide (rGO) into a PVA matrix via vacuum-induced self-assembly and thermal-pressure lamination. A green hypochlorous acid oxidation strategy endows O-MWCNT with GO-like water dispersibility while preserving reducibility, overcoming the dispersion-conductivity trade-off. Oxygen functional groups on O-MWCNTs enhance dispersion and act as dynamic anchors for PVA chains, promoting long-range polymer interlinking (rather than confinement) to maintain flexibility—retaining over 96 % thermal conductivity (k) after 1000 folding cycles. Scanning electron microscopy confirmed the formation of continuous 3D nano-carbon networks, where O-MWCNTs act as vertical interconnects bridging the rGO nanosheets, establishing continuous conductive and heat conduction pathways. PVA chains form an elastic “web” around functionalized fillers, with hydrogen bonds between hydroxyl groups (-OH) of PVA and oxygen moieties (-COOH, -C=O) on nanocarbons enabling stress redistribution. At a rGO:O-MWCNT ratio (4:6) and 70 wt% filler loading, the films exhibit superhigh in-plane/through-plane electrical (3007.5/721.5 S/m) and thermal (67.7/11.5 W/m·K) conductivities. Notably, they maintain ∼7.8 % elongation at break, defying the rigidity-conductivity trade-off, thanks to oxygen-mediated interfaces where sacrificial hydrogen bonds dissipate strain while preserving conductive networks. This dual-filler design leverages rGO (lateral conduction) and O-MWCNTs (vertical bridges) to overcome conductivity anisotropy. The films' exceptional electrical-thermal-mechanical performance, paired with scalable fabrication, positions them as a transformative platform for flexible electronics, thermal interface materials, and energy storage systems.
摘要：
With the increasing power density of electronic devices, flexible thermal interface materials face the challenge of reconciling thermal conductivity efficiency with mechanical compatibility, which restricts the reliability of high-density integrated systems. This study achieves oxygen-amine co-functionalization of nanodiamonds/boron nitride nanosheets via a two-step chemical process, and constructs a 3D thermal network in cellulose nanofibers by combining vacuum self-assembly with hot-pressing technology. The prepared film exhibits bidirectional thermal conductivities of 18.65/4.72 W·m −1 ·K −1 , a volume resistivity exceeding 10 12 Ω·cm, and retains 97 % of its thermal conductivity after 1000 folding cycles. In comparison to commercial silicon-based TIMs, our composite significantly enhances the cooling effect, achieving a substantial temperature reduction of 33 °C on the LED chip surface. The results indicate that functionalized nanofillers reduce phonon scattering through interfacial anchoring effects, and their synergistic interaction is the key to the performance breakthrough. This work realizes efficient thermal transport in a flexible insulating system for the first time, providing a new solution for thermal management in high-power flexible electronics and surpassing the limitations of existing materials in terms of stability and multifunctional integration.
With the increasing power density of electronic devices, flexible thermal interface materials face the challenge of reconciling thermal conductivity efficiency with mechanical compatibility, which restricts the reliability of high-density integrated systems. This study achieves oxygen-amine co-functionalization of nanodiamonds/boron nitride nanosheets via a two-step chemical process, and constructs a 3D thermal network in cellulose nanofibers by combining vacuum self-assembly with hot-pressing technology. The prepared film exhibits bidirectional thermal conductivities of 18.65/4.72 W·m −1 ·K −1 , a volume resistivity exceeding 10 12 Ω·cm, and retains 97 % of its thermal conductivity after 1000 folding cycles. In comparison to commercial silicon-based TIMs, our composite significantly enhances the cooling effect, achieving a substantial temperature reduction of 33 °C on the LED chip surface. The results indicate that functionalized nanofillers reduce phonon scattering through interfacial anchoring effects, and their synergistic interaction is the key to the performance breakthrough. This work realizes efficient thermal transport in a flexible insulating system for the first time, providing a new solution for thermal management in high-power flexible electronics and surpassing the limitations of existing materials in terms of stability and multifunctional integration.
