超拉伸水凝胶热电偶  

Ultra-stretchable hydrogel thermocouples for intelligent wearables

作　　者：赵乙凡 付希凡 刘冰涵 孙剑韬 庄子涵 杨培华 钟俊文 刘抗 Yifan Zhao;Xifan Fu;Binghan Liu;Jiantao Sun;Zihan Zhuang;Peihua Yang;Junwen Zhong;Kang Liu(MOE Key Laboratory of Hydraulic Machinery Transients,School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;School of Smart Manufacturing,Jianghan University,Wuhan 430056,China;The Institute of Technological Sciences,Wuhan University,Wuhan 430072,China;Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics,University of Macao,Macao 999078,China)

机构地区：[1]MOE Key Laboratory of Hydraulic Machinery Transients,School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China [2]School of Smart Manufacturing,Jianghan University,Wuhan 430056,China [3]The Institute of Technological Sciences,Wuhan University,Wuhan 430072,China [4]Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics,University of Macao,Macao 999078,China

出　　处：《Science China Materials》2023年第5期1934-1940,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(62161160311,22209124 and 51976141);the Natural Science Foundation of Hubei Province(2021CFB208);the Science and Technology Development Fund,Macao SAR(FDCT)(0059/2021/AFJ and 0040/2021/A1)。

摘　　要：可拉伸温度传感对实现人机触觉交互和温度调节至关重要,这些传感元件需要贴合特异性表面,且在拉伸条件下保持温度感知的精度.现有可拉伸温度传感器由于温度和形变引起电阻变化的相互干扰,在拉伸过程中存在固有的传感不稳定问题.本文提出了一种超可拉伸水凝胶热电偶,通过构建具有动态交联双网络的热电水凝胶,实现水凝胶热电偶的超拉伸性.通过设计的P型和N型热电水凝胶,构建热电偶单元.热电偶表现出1.93 mV K^(-1)的高塞贝克系数,即使在100%的拉伸应变下,灵敏度依然保持稳定.本文的研究结果为可拉伸温度传感器提供了一种新的策略,并有望广泛应用于智能可穿戴设备.Stretchable temperature sensors are necessary to enable tactile interaction and thermoregulation in the human body and soft robots.These sensors should be conformably adhered to a deformable surface and maintain temperature perception accuracy when stretched.However,current mainstream stretchable temperature sensors based on thermistors suffer from inherently unstable sensing during stretching due to the mutual interference of resistance changes caused by temperature and mechanical deformations.Herein,we propose an ultra-stretchable hydrogel thermocouple that provides unaltered temperature sensing upon stretching.The ultrastretchability of this thermocouple is achieved by constructing thermogalvanic hydrogels with dynamic crosslinked double networks.By connecting P-type and N-type thermogalvanic hydrogels,the thermocouple exhibits a high equivalent Seebeck coefficient of 1.93 mV K^(−1)and a stable sensitivity even under a 100%tensile strain.The advantage of this ultrastretchable thermocouple is demonstrated in a smart glove prototype,which enables haptic feedback.Our work provides a new strategy for stretchable temperature sensors and may promote the development of intelligent wearables.

关 键 词：ultra-stretchable thermocouple thermogalvanic hydrogels strain-insensitive perception intelligent wearables 

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]