基于丝网印刷制备的导电水凝胶基可拉伸应变传感器  

Screen-printed Conductive Hydrogel-based Stretchable Strain Sensors

作　　者：朱文虎 孙奉琳 王蓉 JOO SangWoo 丛晨浩 李欣琳 ZHU Wenhu;SUN Fenglin;WANG Rong;JOO SangWoo;CONG Chenhao;LI Xinlin(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 266071,Shandong,China;School of Chemical Engineering,Konkuk University,Seoul 05029,Republic of Korea;Qingrou(Qingdao)Intelligent Technology Co.,Ltd.,Qingdao 266071,Shandong,China;School of Mechanical Engineering,Yeungnam University,Gyeongsan 38541,Republic of Korea)

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]建国大学化学工程学院,首尔050293 [3]青柔(青岛)智能科技有限公司,山东青岛266071 [4]岭南大学机械工程学院,庆山38541

出　　处：《材料导报》2025年第7期209-214,共6页Materials Reports

基　　金：山东省高校青年创新团队支持计划(2022KJ144)。

摘　　要：随着大健康领域的快速发展,柔性电极作为人体可穿戴器件上最基础的功能单元而备受关注。然而大多数电极仍具有拉伸程度有限与导电性较差的特性,使其实际应用受限。本工作使用聚乙烯醇(PVA)为导电水凝胶基体,聚(3,4-乙烯二氧噻吩)-聚苯乙烯磺酸(PEDOT:PSS)为导电网络,水为溶剂,单宁酸(TA)为交联剂,制备了一种具备多重氢键体系、适用于丝网印刷的水凝胶型导电油墨。同时,使用冰晶作为模板并采用冻融循环技术构建了复杂的物理网络结构。以表面经十二烷基硫酸钠(SDS)亲水修饰的聚二甲基硅氧烷(PDMS)为基底,利用丝网印刷技术制备了可拉伸电极。最终得到的TA-PVA/PEDOT:PSS水凝胶电极具有480%的最大拉伸应变。此外,构建该多重氢键体系的思路有可能扩展应用在其他自愈合导电水凝胶电极上。With the rapid development of the field of great health,flexible electrodes have attracted much attention as the most basic functional unit on human wearable devices.However,most of the electrodes still have the characteristics of limited stretching degree and poor conductivity,which restrains their practical application.In this paper,a hydrogel-based and multi-hydrogen-bond-containing conductive ink for screen printing technology was prepared using polyvinyl alcohol(PVA)as the conductive hydrogel matrix,poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid)(PEDOT:PSS)as the conductive network,water as the solvent,and tannic acid(TA)as the cross-linking agent.And a complex physical network structure was subsequently constructed using ice crystals as the templates and freeze-thaw cycling technique.Further the stretchable electrode was prepared through screen printing technique using the polydimethylsiloxane(PDMS)substrate whose surface was hydrophilically pre-modified by sodium dodecyl sulfate(SDS).The eventually produced TA-PVA/PEDOT:PSS hydrogel electrode exhibited a ultimate tensile strain of 480%.In addition,the idea of constructing this multiple hydrogen bonding system has the potential to be extended for application to other self-healing conductive hydrogel electrodes.

关 键 词：导电水凝胶 丝网印刷 应变传感器 冻融循环法 

分 类 号：TB34[一般工业技术—材料科学与工程]