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

机构：[1] Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China; [2] National Key Laboratory for Development and Utilization of Forest Food Resources, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, 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)

语种：英文

外文关键词：Bearings (machine parts) - Chains - Electronic equipment - Hydrogels - Hydrogen bonds - Muscle - Nanocrystals - Strengthening (metal) - Wearable sensors

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. ? 2025 Elsevier B.V.