同轴湿纺炭黑-硅胶复合内涂层柔性纤维应变传感器  

Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor

作　　者：陈娟 盛斌[1,2] 陈上碧 肖杰俣 熊岩 CHEN Juan;SHENG Bin;CHEN Shangbi;XIAO Jieyu;XIONG Yan(School of Optical Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Modern Optical Systems,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海市现代光学系统重点实验室,上海200093

出　　处：《传感器与微系统》2021年第4期4-7,共4页Transducer and Microsystem Technologies

基　　金：上海市自然科学基金资助项目(19ZR1436100);国家自然科学基金资助项目(11105149)。

摘　　要：通过同轴湿纺技术制备了一种多层中空结构的柔性纤维应变传感器。外层是由硅胶(Ecoflex)材料制成的弹性基底层,内层是由炭黑/聚二甲基硅氧烷(CB/PDMS)复合材料制成的导电层。中空结构由CB/PDMS/CHCl 3混合物受热时CHCl 3挥发所致。同时由于CB/PDMS复合材料涂层产生了裂纹结构,增强了该中空纤维的应变灵敏度(GF),内涂层随拉伸出现了明显的断开-回复现象。实验表明:当加入的CHCl 3与PDMS体积比为3︰1时,CB-Ecoflex纤维具有最高的灵敏度,GF值为7.14,与无裂纹CB-Ecoflex纤维相比提高了约6倍。并对人体运动监测方面进行了研究,发现CB-Ecoflex纤维对人体的运动显示了良好的响应特性。此方法为可穿戴电子器件的制备提供了一种新路径。A flexible fiber strain sensor with multi-layer hollow structure is prepared by coaxial wet spinning technology.The outer layer is an elastic substrate layer made of pure Ecoflex material,and the inner layer is a conductive layer made of carbon black/polydimethylsiloxane(CB)/PDMS composite material.The hollow structure is caused by volatilization of CHCl 3 when the CB/PDMS/CHCl 3 mixture is heated.Simultaneously,the CB/PDMS composite coating produces a cracked structure,which enhances the gauge factor(GF)of the hollow fiber,the inner coating shows obvious disconnection-recovery phenomenon with stretching.Experiments show that when the volume ratio of added CHCl 3 to PDMS is 3:1,the CB-Ecoflex fiber has the highest sensitivity.The GF value is 7.14,which is compared with non-cracked CB-Ecoflex fiber improved by about six times.Research on human motion monitoring is carried out,and it is found that CB-Ecoflex fiber show good response characteristics to human motion.The flexible strain sensor prepared by this method provides a new path for the preparation of wearable electronic devices.

关 键 词：同轴湿纺技术 炭黑-硅胶(CB-Ecoflex) CHCl 3 裂纹结构 柔性应变传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]