高强韧聚乙烯醇/聚丙烯酰胺导电水凝胶的制备及在应变传感器中的应用  

Preparation of Tough and Conductive Polyvinyl Alcohol/Polyacrylamide Hydrogel and Its Application for Strain Sensor

作　　者：王锦全 张蕾 何立 江献财 Jinquan Wang;Lei Zhang;Li He;Xiancai Jiang(School of Chemical Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学石油化工学院,福建福州350108

出　　处：《高分子材料科学与工程》2023年第11期129-136,共8页Polymer Materials Science & Engineering

基　　金：福建省自然科学基金资助项目(2020J01516);高分子材料科学与工程国家重点实验室(四川大学)开放课题(Sklpme 2019-4-25)。

摘　　要：将自由基聚合后得到的凝胶浸泡于不同的无机盐溶液中(NaCl,Na_(2)SO_(4)和Na_(3)Cit),制备出聚乙烯醇/聚丙烯酰胺(PVA/PAM)双网络导电水凝胶,研究了其力学性能的变化与不同盐之间的关系。这3种盐中,只有Na_(3)Cit能够显著提高PVA/PAM复合凝胶的力学性能,且所得凝胶能够在室温下保持稳定。其中Na_(3)Cit的盐析作用引起了复合凝胶中PVA物理交联网络的形成,从而得到了强韧的PVA/PAM-Cit双网络导电水凝胶。PVA/PAM-Cit双网络水凝胶具有较高的力学强度(1.57 MPa)和韧性(10.52 MJ/m^(3))。此外PVA/PAM-Cit双网络水凝胶还表现出良好的传感性能。Conductive hydrogels have attracted the attention of many researchers in the past decade.However,the applications of conductive hydrogels were greatly limited due to their weak mechanical properties.In this work,the PVA/PAM double network conductive gels were prepared by free radical polymerization and then soaked in different kinds of salt(NaCl,Na_(2)SO_(4),and Na_(3)Cit)aqueous solution.The relationship between their performance and salts was studied.Among the three salts,only Na_(3)Cit can significantly improve the performance of the PVA/PAM composite gel and the obtained hydrogel remains stable at room temperature.The salting-out of Na_(3)Cit induced the formation of physically cross-linked PVA network in the composite gel,resulting in a strong and tough PVA/PAM-Na_(3)Cit double network hydrogel.The PVA/PAM-Na_(3)Cit hybrid double-network hydrogel with chemically and physically crosslinked network exhibits a high tensile strength(1.57 MPa)and toughness(10.52 MJ/m^(3)).In addition,the PVA/PAM-Na_(3)Cit double network hydrogel has good sensing properties.

关 键 词：水凝胶 导电性 盐析作用 柠檬酸钠 应变传感器 

分 类 号：TQ427.26[化学工程]