rGO/AgNPs/改性PVA柔性应变传感薄膜的制备及其性能  

Preparation and properties of rGO/AgNPs composite modified PVA flexible strain sensing films

作　　者：赵为陶[1] 姚雪烽 严艺 张德锁[2] 林红[2] 陈宇岳[2] ZHAO Weitao;YAO Xuefeng;Yan Yi;ZHANG Desuo;LIN Hong;CHEN Yuyue(Changzhou Vocational Institute of Textile and Garment,Changzhou 213164,China;School of Textile and Clothing Engineering,Soochow University,Suzhou 215021,China)

机构地区：[1]常州纺织服装职业技术学院,江苏常州213164 [2]苏州大学纺织与服装工程学院,江苏苏州215021

出　　处：《现代纺织技术》2022年第4期80-88,共9页Advanced Textile Technology

基　　金：江苏省高职院校教师专业带头人高端研修项目(2020GRFX002);江苏高校"青蓝工程"优秀教学团队项目(苏教师函〔2021〕11号);常州纺织服装职业技术学院优秀青年骨干教师项目(常纺院人字〔2019〕11号)。

摘　　要：为了获得具有良好传感性以及延展性的柔性应变薄膜,通过端氨基超支化聚合物(HBP-NH_(2))与氧化石墨烯(GO)、硝酸银(AgNO_(3))之间的酰胺化交联以及原位还原组装作用制备了还原氧化石墨烯/纳米银颗粒(rGO/AgNPs)微纳复合导电材料,而后将其引入改性聚乙烯醇(PVA)基体中,采用流延成膜法制备了一种可监测应变的柔性应变压阻式传感薄膜。研究发现:rGO/AgNPs微纳复合导电填料均匀地分散在改性PVA薄膜体系中,在大应变量87.5%情况下,该薄膜电阻变化率最高可达497.4%,灵敏度为5.68。此外,该薄膜在循环拉伸和变速拉伸测试中展现了良好的稳定性和可重复性,且在监测人体手指大幅度弯曲运动时,也表现出相对稳定的电信号变化输出。In order to obtain flexible strain films with good sensing and ductility,reduced graphene oxide/silver nanoparticles(rGO/AgNPs)micro nano composite conductive materials were prepared by amidation crosslinking and in-situ reduction assembly between amino terminated hyperbranched polymer(HBP-NH_(2)),graphene oxide(GO)and silver nitrate(AgNO_(3)),and then introduced into modified polyvinyl alcohol(PVA).A flexible strain piezoresistive sensing film which can monitor strain was prepared by tape casting method.It is found that rGO/AgNPs micro nano composite conductive filler is evenly dispersed in the modified PVA film system.In the case of large strain(87.5%),the resistance change rate of rGO/AgNPs/modified PVA film is up to 497.4%and the sensitivity factor is 5.68.In addition,it also shows good stability and repeatability in cyclic tensile and variable speed tensile tests,and shows relatively stable electrical signal change output when monitoring the large-scale bending movement of human fingers.This study has certain reference significance for the preparation,structure and performance regulation of micro nano composite flexible piezoresistive strain sensor.

关 键 词：还原氧化石墨烯 纳米银颗粒 聚乙烯醇 应变传感薄膜 

分 类 号：TQ317.9[化学工程—高聚物工业]