文献类型：期刊文献

英文题名：Layered Structured MXene/PVA Conductive Hydrogels with Excellent Mechanical Properties for Flexible Strain and Temperature Sensing

作者：Chen, Hongming[1,2,3];Chen, Xinyuan[1,2,3];Rong, Chao[1,2,3];Ma, Xinan[1,2,3];Zhang, Bowei[1,2,3];Xuan, Fu-Zhen[1,2,3]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：21

期号：39

外文期刊名：SMALL

收录：;EI(收录号：20253419021025);WOS:【SCI-EXPANDED(收录号:WOS:001586662400046)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 52422505, 12274124), the Shanghai Pilot Program for Basic Research (Grant No. 22TQ1400100-6), the Fundamental Research Funds for the Central Universities, and the Innovative Research Group Project of the National Natural Science Foundation of China (Grant No. 52321002).

语种：英文

外文关键词：hydrogels; layered microstructures; MXenes; sensors

摘要：Conductive hydrogels have broad application in flexible electronics, soft robotics, and human-machine interaction. However, the limited mechanical properties and complex fabrication processes hinder further development. This study proposes a biomimetic hierarchical fabrication strategy to create MXene (2D transition metal carbides)/polyvinyl alcohol (PVA) composite conductive hydrogels with a layered microstructure (LMP) via evaporation-induced self-assembly. The joint action of multiple energy dissipation mechanisms significantly enhances the mechanical properties of the hydrogel, achieving a tensile strength of 6.11 MPa, toughness of 20.57 MJ m(-)(3), and elongation at break of 730.73%. Meanwhile, the high conductivity of Ti3C2Tx MXene endows the hydrogel with excellent sensing capabilities, including strain sensitivity (GF = 1.96), fast response time (approximate to 100 ms), and temperature sensitivity (TCR = -3.468%/degrees C). This study provides a simple and efficient strategy for developing strong, tough, and multifunctional conductive hydrogels.