Compliant Iontronic Triboelectric Gels with Phase-Locked Structure Enabled by Competitive Hydrogen Bonding  

作　　者：Guoli Du Yuzheng Shao Bin Luo Tao Liu Jiamin Zhao Ying Qin Jinlong Wang Song Zhang Mingchao Chi Cong Gao Yanhua Liu Chenchen Cai Shuangfei Wang Shuangxi Nie 

机构地区：[1]School of Light Industry and Food Engineering,Guangxi University,Nanning 530004,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第9期180-194,共15页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(22278091);the Guangxi Natural Science Foundation of China(2023GXNSFFA026009);All the experiments with human research participants were approved by the Medical Ethics Committee of Guangxi University(GXU-2023-023);informed written consent was obtained from all participants.

摘　　要：Rapid advancements in flexible electronics technology propel soft tactile sensing devices toward high-level biointegration,even attaining tactile perception capabilities surpassing human skin.However,the inherent mechanical mismatch resulting from deficient biomimetic mechanical properties of sensing materials poses a challenge to the application of wearable tactile sensing devices in human-machine interaction.Inspired by the innate biphasic structure of human subcutaneous tissue,this study discloses a skin-compliant wearable iontronic triboelectric gel via phase separation induced by competitive hydrogen bonding.Solvent-nonsolvent interactions are used to construct competitive hydrogen bonding systems to trigger phase separation,and the resulting soft-hard alternating phase-locked structure confers the iontronic triboelectric gel with Young’s modulus(6.8-281.9 kPa)and high tensile properties(880%)compatible with human skin.The abundance of reactive hydroxyl groups gives the gel excellent tribopositive and self-adhesive properties(peel strength>70 N m^(−1)).The self-powered tactile sensing skin based on this gel maintains favorable interface and mechanical stability with the working object,which greatly ensures the high fidelity and reliability of soft tactile sensing signals.This strategy,enabling skin-compliant design and broad dynamic tunability of the mechanical properties of sensing materials,presents a universal platform for broad applications from soft robots to wearable electronics.

关 键 词：Triboelectric nanogenerator CELLULOSE Triboelectric gel Self-powered sensor Energy harvesting 

分 类 号：TQ427.26[化学工程]