Ultra-antifreeze,ultra-stretchable,transparent,and conductive hydrogel for multi-functional flexible electronics as strain sensor and triboelectric nanogenerator  

作　　者：Xinhuan Dai Yong Long Bing Jiang Wenbin Guo Wei Sha Jiangwen Wang Zifeng Cong Jiwei Chen Bingjun Wang Weiguo Hu 

机构地区：[1]Chinese Academy of Sciences Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China [2]School of Nanoscience and Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]Center on Nanoenergy Research,School of Physical Science and Technology,Guangxi University,Nanning 530004,China

出　　处：《Nano Research》2022年第6期5461-5468,共8页纳米研究（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.22001018,52192610,52173298,and 61904012);the National Key R&D Program of China(No.2021YFA1201603).

摘　　要：Conductive hydrogels have become one of the most promising candidates for flexible electronics due to their excellent mechanical flexibility,durability of deformation,and good electrical conductivity.However,in real applications,severe environments occur frequently,such as extremely cold weather.General hydrogels always lack anti-freeze and anti-dehydration abilities.Consequently,the functions of electronic devices based on traditional hydrogels will quickly fail in extreme environments.Therefore,the development of environmentally robust hydrogels that can withstand extremely low temperatures,overcome dehydration,and ensure the stable operation of electronic devices has become increasingly important.Here,we report a kind of graphene oxide(GO)incorporated polyvinyl alcohol-polyacrylamide(PVA-PAAm)double network hydrogel(GPPDhydrogel)which shows excellent anti-freeze ability.The GPPD-hydrogel exhibits not only good flexibility and ultra-high stretchability up to 2,000%,but ensures a high sensitivity when used as the strain sensor at−50°C.More importantly,when serving as the electrode of a sandwich-structural triboelectric nanogenerator(TENG),the GPPD-hydrogel endows the TENG high and stable output performances even under−80°C.Besides,the GPPD-hydrogel is demonstrated long-lasting moisture retention over 100 days.The GPPD-hydrogel provides a reliable and promising candidate for the new generation of wearable electronics.

关 键 词：triboelectric nanogenerators ANTIFREEZE ultra-stretchable hydrogels strain sensors multi-functional flexible electronics 

分 类 号：TM31[电气工程—电机] TP212[自动化与计算机技术—检测技术与自动化装置]