文献类型：期刊文献

英文题名：A PVP-assisted Fenton approach for MWCNT purification and its application in conductive hydrogel fabrication

作者：Wang, Lei[1];Lu, Zhao jin[1,2];Wang, Zhi wen[1];Pei, Long yao[1];Pang, Zhi wei[1];Qi, Ji hao[1];Chen, Xin[1];Sha, Jin[1];Bai, Zhi shan[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：49

期号：44

起止页码：19181

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20260119843609);WOS:【SCI-EXPANDED(收录号:WOS:001599259100001)】；

基金：The research was sponsored by the National Science Fund for Distinguished Young Scholars, China (No. 22225804) and the National Natural Science Foundation of China, China (No. 22408101), the Natural Science Foundation of Shanghai, China (No. 25ZR1401085) and the Guizhou Provincial Science and Technology Support Program (Qiankehezhi [2025] General 091).

语种：英文

外文关键词：Amorphous carbon - Compressive strength - Doping (additives) - Fabrication - Hydrogels - Impurities - Multiwalled carbon nanotubes (MWCN) - Purification - Removal - Yarn

摘要：Impurities such as residual metal catalysts and amorphous carbon in pristine multi-walled carbon nanotubes (MWCNTs) hinder their dispersibility and conductivity in aqueous media, thereby limiting their application in conductive hydrogels. Here, we report a polyvinylpyrrolidone (PVP)-assisted Fenton method for efficient removal of impurities, and systematically investigate the influence of PVP doping on surface characteristics and dispersion stability in water. Optimal purification, achieved with 10 wt% PVP, establishes a stable non-covalent coating that effectively eliminates impurities and markedly improves aqueous dispersibility. Incorporating 0.3 wt% of these purified MWCNTs into a polyacrylamide-poly(2-acrylamido-2-methylpropanesulfonic acid)/poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) conductive hydrogel matrix yields a material with significantly enhanced performance: tensile strength (151.81 kPa), elongation at break (1595%), toughness (1.73 MJ m-3), and compressive strength (254.3 kPa) are increased by 11.58% compared to pristine MWCNT-containing hydrogels, while the electrical conductivity reaches 2.85 S m-1, representing a 13% improvement. This PVP-assisted Fenton purification strategy substantially enhances the functional performance of MWCNTs, enabling the development of high-performance conductive hydrogels with strong potential for flexible strain-sensing applications.