Waterproof Iontronic Yarn for Highly Sensitive Biomechanical Strain Monitoring in Wearable Electronics  

作　　者：Zhiping Feng Qiang He Xue Wang Jing Qiu Hongbing Wu Yinggang Lin Yufen Wu Jin Yang 

机构地区：[1]Department of Optoelectronic Engineering,Key Laboratory of Optoelectronic Technology and Systems,Ministry of Education,Chongqing University,Chongqing,China 400044 [2]College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 400044,China

出　　处：《Advanced Fiber Materials》2024年第3期925-935,共11页先进纤维材料（英文）

基　　金：supported by the National Key Research and Development Project(2021YFA1201600);the Natural Science Foundation of Innovative Research Groups under Grant cstc2020jcyj-cxttX0005;the Natural Science Foundation Projects of Chongqing(cstc2022ycjh-bgzxm0206);a grant from the science and technology project of State Grid(5700-202235208 A-1-1-ZN);the Science and Technology Funds of Chongqing Municipal Education Commission(KJQN202100539,KJQN202100533);the National Natural Science Foundation of China(Grant No.62271089);Natural Science Foundation Project of Chongqing(Grant No.CSTB2022NSCQ-MSX0425).

摘　　要：Flexible yarn sensors designed for integration into textiles have the potential to revolutionize wearable technology by continuously monitoring biomechanical strain.However,existing yarn-shaped sensors rely on capacitance as a strain-dependent electrical signal and often face limitations in achieving high sensitivity,especially across a broad strain range.Here,we propose a waterproof all-in-one capacitive yarn sensor(ACYS)that is tailored to monitor a wide range of biophysical strains.Owing to the coaxial helical electrode and the ionic liquid-doped dielectric layer,the ACYS demonstrates remarkable stretchability,ultrahigh capacitance variation,and an outstanding gauge factor of 6.46 at 140%strain.With exceptional mechanical durability based on enduring 3300 stretching cycles and favorable resistance to sweat erosion,this 1D structure can be seamlessly integrated into textiles,making it ideal for use in wearable electronics.Demonstrating its application versatility,the ACYS accurately measures biomechanical strain in joint movements,facial expressions,and physiological assessments,making it a promising advancement in wearable technology.

关 键 词：Iontronic yarn Capacitive strain sensor High sensitivity Biomechanical strain 

分 类 号：TM215[一般工业技术—材料科学与工程]