首页|Noncovalent cross-linked engineering hydrogel with low hysteresis and high sensitivity for flexible self-powered electronics

Noncovalent cross-linked engineering hydrogel with low hysteresis and high sensitivity for flexible self-powered electronics

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In this study,the hydrogel network was reinforced by covalent-like hydrogen bonding,and the strong binding ability of boron-nitrogen coordination served as the main driving force.Among them,acrylamide(AM)and 3-acrylamidophenylboronic acid(AAPBA)were the main body,and the numerous hydroxyl groups in the trehalose(Treh)molecule and other polymer groups formed strong hydrogen bonding interactions to improve the mechanical properties of the PAM/PAAPBA/Treh(PAAT)hydrogel and ensured the simplicity of the synthesis process.The hydrogel possessed high strain at break(1239％),stress(64.7 kPa),low hysteresis(100％to 500％strain,corresponding to dissipation energy from 1.37 to 7.80 kJ/m3),and outstanding cycling stability(retained more than 90％of maximum stress after 200 ten-sile cycles).By integrating carbon nanotubes(CNTs)into PAAT hydrogel(PAATC),the PAATC hydrogel with excellent strain response performance was successfully constructed.The PAATC conductive hydro-gel exhibited high sensitivity(gauge factor(GF)=10.58 and sensitivity(S)=0.304 kPa-1),wide strain response range(0.5％-1000％),fast response time(450 ms),and short recovery time(350 ms),excellent fatigue resistance,and strain response stability.Furthermore,the PAATC-based triboelectric nanogener-ator(TENG)displayed outstanding energy harvesting performance,which shows its potential for appli-cation in self-powered electronic devices.

Low hysteresisCovalent-like hydrogen bondingBoron-nitrogen coordinationHydrogel sensorTriboelectric nanogenerator

Hang Yuan、Shaowei Han、Jia Wei、Songwei Li、Peipei Yang、Hao-Yang Mi、Chuntai Liu、Changyu Shen

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National Engineering Research Center for Advanced Polymer Processing Technology,Key Laboratory of Materials Processing and Mold(Ministry of Education),Zhengzhou University,Zhengzhou 450002,Henan,China

Yunnan Tobacco Quality Inspection & Supervision Station,Kunming 650106,Yunnan,China

National Natural Science Foundation of ChinaChina Postdoctoral Science FoundationNational Key R&D program of China

520023562020M6722692019YFA0706802

2024

10.1016/j.jechem.2024.02.039

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)