Hydrogen-Bonding-Crosslinked Polyzwitterionic Hydrogelswith Extreme Stretchability, Ultralow Hysteresis, Self-adhesion,and Antifreezing Performance as Flexible Self-powered ElectronicDevices  

作　　者：Siyu Bao Hongying Wang Baocheng Liu Chenhao Huang Jingguo Deng Wenjie Ren Yongmao Li Jianhai Yang 

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Laboratory of Composite and Functional Materials,Tianjin University,Tianjin300350,China [2]School of Electrical and Information Engineering,Tianjin University,Tianjin300072,China [3]Institution of Disaster and Emergency Medicine,Tianjin University,Tianjin300072,China [4]State Key Laboratory of Molecular Engineering of Polymers,Fudan University,Shanghai200438,China

出　　处：《Transactions of Tianjin University》2025年第1期15-28,共14页天津大学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.T2222013 and 52073203);Tianjin Natural Science Foundation(No.22JCQNJC01040);the State Key Laboratory of Molecular Engineering of Polymers(Fudan University)(No.K2024-19).

摘　　要：Flexible strain sensors have received tremendous attention because of their potential applications as wearable sensing devices.However, the integration of key functions into a single sensor, such as high stretchability, low hysteresis, self-adhesion, andexcellent antifreezing performance, remains an unmet challenge. In this respect, zwitterionic hydrogels have emerged asideal material candidates for breaking through the above dilemma. The mechanical properties of most reported zwitterionichydrogels, however, are relatively poor, significantly restricting their use under load-bearing conditions. Traditional improve-ment approaches often involve complex preparation processes, making large-scale production challenging. Additionally,zwitterionic hydrogels prepared with chemical crosslinkers are typically fragile and prone to irreversible deformation underlarge strains, resulting in the slow recovery of structure and function. To fundamentally enhance the mechanical properties ofpure zwitterionic hydrogels, the most effective approach is the regulation of the chemical structure of zwitterionic monomersthrough a targeted design strategy. This study employed a novel zwitterionic monomer carboxybetaine urethane acrylate(CBUTA), which contained one urethane group and one carboxybetaine group on its side chain. Through the direct polym-erization of ultrahigh concentration monomer solutions without adding any chemical crosslinker, we successfully developedpure zwitterionic supramolecular hydrogels with significantly enhanced mechanical properties, self-adhesive behavior, andantifreezing performance. Most importantly, the resultant zwitterionic hydrogels exhibited high tensile strength and tough-ness and displayed ultralow hysteresis under strain conditions up to 1100%. This outstanding performance was attributedto the unique liquid–liquid phase separation phenomenon induced by the ultrahigh concentration of CBUTA monomers inan aqueous solution, as well as the enhanced polymer chain entanglement and the strong hydrogen bon

关 键 词：ZWITTERIONIC Hydrogen bonding Mechanical enhancement Strain sensor Triboelectric nanogenerator 

分 类 号：TQ427.26[化学工程] TP212[自动化与计算机技术—检测技术与自动化装置]