文献类型：期刊文献

英文题名：Muscle-like self-strengthening poly(vinyl alcohol)/cellulose/MXene composite hydrogel by mechanical training for wearable electronics

作者：Lu, Chuanwei[1] Gong, Sijie[1] Xia, Yu[1] Xu, Ning[1] Yu, Juan[1] Wang, Chunpeng[2] Wang, Jifu[2] Yong, Qiang[1] Chu, Fuxiang[2]

第一作者：Lu, Chuanwei

通信作者：Lu, CW[1];Yu, J[1];Chu, FX[2]

机构：[1]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Key Lab Dev & Utilizat Forest Food Resources, Nanjing 210042, Peoples R China

年份：2025

卷号：322

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20253318974879);Scopus(收录号：2-s2.0-105012945221);WOS:【SCI-EXPANDED(收录号:WOS:001585651200008)】；

基金：The authors acknowledge the support from National Key Research and Development Program of China (2024YFD2200802) , National Natural Science Foundation of China (32201498) , the Foundation of State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences (GZKF202327) .

语种：英文

外文关键词：Mechanical training; Self-strengthening; Polyvinyl alcohol; Cellulose; Composite hydrogel

摘要：The development of mechanically tunable and self-strengthening hydrogels for advanced electronic applications is highly desirable but remains a challenge. Muscles, as force-bearing tissues, could autonomously grow to adapt to the surrounding environment through cyclic disassembly and reconstruction of muscle fibers by mechanical training. Inspired by this biological feature, we presented a mechanical training enhancement strategy for preparing self-strengthening conductive composite hydrogels. The polyvinyl alcohol (PVA) acted as the hydrogel matrix, MXene serving as conductive medium realized high conductivity (679.6 mS/m), and the incorporation of carboxymethyl cellulose (CMC) not only prevented MXene self-stacking but also strengthened hydrogen bonding interactions and chain entanglement density. During mechanical training process, the nanocrystalline domains of the PVA chain were reoriented into a highly ordered structure, while the decrease in average distance between neighboring nanocrystalline domains increased the density of nanocrystalline domains in the cross-section. As a result, the prestretched composite hydrogel demonstrated enhanced tensile strength of 1356.1 kPa and toughness of 2962.2 kJ/m3, which were 4.4 and 6.4 times of the initial composite hydrogel, respectively. The composite hydrogels were successfully employed as strain sensors for monitoring human motions. This work demonstrated a promising approach to developing self-strengthening soft materials for advanced applications.