PDA@CNTs/EVA纤维应变传感器的制备及其性能  

Preparation and performance of PDA@CNTs/EVA fiber strain sensor

作　　者：谢明辉 董余兵[1] XIE Minghui;DONG Yubing(School of Materials Science&Engineering,Zhejiang Sci-Tech University,Hangzhou310018,China)

机构地区：[1]浙江理工大学材料科学与工程学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2022年第4期512-523,共12页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：“纺织之光”应用基础研究项目(J202102)。

摘　　要：为了获得具有高灵敏度、宽传感范围和卓越耐用性等优异特性的柔性应变传感器,以乙烯-醋酸乙烯酯(Ethylene-vinyl acetate copolymer,EVA)、碳纳米管(Carbon nanotubes,CNTs)和盐酸多巴胺(3-Hydroxytyramine hydrochloride,PDA)为主要原料,通过双螺杆挤出拉伸制备EVA纤维,采用溶胀-超声法和原位聚合法先后制得CNTs/EVA纤维和PDA@CNTs/EVA纤维。采用SEM、万能试验机、TGA、电化学工作站和静电计等仪器设备,表征分析了该纤维的微观结构、力学性能、热稳定性和传感性能,并探究了该纤维在人体运动监测方面的应用性能。结果表明:CNTs均匀附着在EVA表面,PDA呈颗粒状黏附在CNTs上面;PDA@CNTs增强了EVA纤维的力学性能,改善了EVA纤维的热稳定性;PDA@CNTs/EVA纤维传感器具有较大应变传感范围(330%)、高灵敏度(17.1)、超快响应速度(257.8 ms);同时,PDA@CNTs/EVA纤维传感器具有优异的静态稳定性和动态耐用性(>3000次循环);对人体运动(包括肘关节的运动、手指的弯曲和嘴巴鼓气/呼气)的监测表明,PDA@CNTs/EVA纤维传感器在人工智能领域的人机界面具有广阔的应用前景。In order to obtain a flexible strain sensor with excellent characteristics such as high sensitivity,wide sensing range and excellent durability,ethylene-vinyl acetate(Ethylene-vinyl acetate copolymer,EVA),carbon nanotubes(Carbon nanotubes,CNTs)and dopamine hydrochloride(3-Hydroxytyramine hydrochloride,PDA)were adopted as the main raw materials to prepare CNTs/EVA fiber and PDA@CNTs/EVA fiber successively through swelling-ultrasonic method and in-situ polymerization method on the basis of preparing EVA fiber through twin screw extrusion method.The microstructure,mechanical properties,thermal stability and sensing properties of the fiber were characterized and analyzed by SEM,universal testing machine,TGA,electrochemical workstation and electrometer,and the application performance of the fiber in human motion monitoring was explored.The results show that the CNTs adhere to the surface of EVA uniformly,and PDA particles adhere to CNTs in granular form;PDA@CNTs enhance the mechanical properties of EVA fiber and improve the thermal stability of EVA fiber.The PDA@CNTs/EVA fiber sensor has a large strain sensing range(330%),high sensitivity(17.1),and ultra-fast response speed(257.8 ms).At the same time,PDA@CNTs/EVA fiber sensor has excellent static stability and dynamic durability(>3000 cycles).The monitoring of human movement(including elbow joint movement,finger bending and mouth bulge/exhale)results show that the PDA@CNTs/EVA fiber sensor has broad application prospects in the human-machine interface of artificial intelligence field.

关 键 词：应变传感器 CNTS 乙烯-醋酸乙烯酯 盐酸多巴胺 大应变范围 

分 类 号：TB332[一般工业技术—材料科学与工程]