Thermal-sensitive ionogel with NIR-light controlled adhesion for ultrasoft strain sensor  

作　　者：Bing Lei Longxue Cao Xinyu Qu Yunlong Liu Jinjun Shao Qian Wang Shuhong Li Wenjun Wang Xiaochen Dong 

机构地区：[1]School of Physical Science and Information Technology,Liaocheng University,Liaocheng 252059,China [2]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),School of Physical and Mathematical Sciences,Nanjing Tech University(NanjingTech),Nanjing 211816,China [3]School of Chemistry&Materials Science,Jiangsu Normal University,Xuzhou 221116,China

出　　处：《Nano Research》2023年第4期5464-5472,共9页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2020YFA0709900),the National Natural Science Foundation of China(No.61775089);the Natural Science Foundation of Shandong Province(No.ZR2020KB018);“Taishan scholars”construction special fund of Shandong Province.

摘　　要：With the widespread prevailing of flexible electronics in human-machine interfaces,health monitor,and human motion detection,ultrasoft flexible sensors are urgently desired with critical demands in conformality.Herein,a temperature-sensitive ionogel with near-infrared(NIR)-light controlled adhesion is prepared by electrostatic interaction of poly(diallyl dimethylammonium chloride)(PDDA)and acrylic acid,as well as the incorporation of the conductive polydopamine modified polypyrrole nanoparticles(PPy-PDA NPs).The PPy-PDA NPs could weaken the tough interaction between polymer chains and depress the Young’s modulus of the ionogel,thus promoting the ionogel ultrasoft(34 kPa)and highly stretchable(1,013%)performance to tensile deformations.In addition,the high photothermal conversion capacity of PPy-PDA NPs ensured the ionogel excellent NIR-light controlled adhesion and temperature sensitivity,which facilitated the ionogel on-demand removal and promised a reliable thermal sensor.Moreover,the resulted ultrasoft flexible sensor exhibited high sensitivity and stability to both strain and pressure in a broad range of deformations,enabling a precise monitoring on various human motions and physiological activities.The temperature-sensitive,ultrasoft,and controlled adhesive capabilities prompted great potential of the flexible ionogel in medical diagnosis and wearable electronics.

关 键 词：ultrasoft TEMPERATURE-SENSITIVE controllable adhesion photothermal effect flexible sensor 

分 类 号：O63[理学—高分子化学]