高强度聚苯胺-聚丙烯酸/聚丙烯酰胺导电水凝胶的制备与性能  

Preparation and properties of strong polyaniline-polyacrylic acid/polyacrylamide conductive hydrogel

作　　者：佘小红 杜娟 朱雯莉 SHE Xiaohong;DU Juan;ZHU Wenli(College of Materials Science and Engineering Sichuan University of Science and Engineering,Zigong 643000,China)

机构地区：[1]四川轻化工大学材料科学与工程学院,自贡643000

出　　处：《复合材料学报》2021年第4期1223-1230,共8页Acta Materiae Compositae Sinica

基　　金：四川理工学院人才引进项目(2017RCL31);材料腐蚀与防护四川省重点实验室开放基金(2020CL22)。

摘　　要：将导电聚合物引入到水凝胶网络中的导电高分子基导电水凝胶,因结合了水凝胶的三维网络结构、良好的生物相容性、优异的力学性能等和导电高分子良好电学性能等优点而被广泛研究,特别是以聚苯胺(PANI)为导电高分子的导电水凝胶。但PANI不溶于水,因此很难制备PANI基导电水凝胶。本文以制备高强度PANI基导电水凝胶为目的,尝试将PANI接枝在亲水性聚合物聚丙烯酸(PAA)上,获得能在水中均匀分散的PANI-PAA导电复合物,再使其与丙烯酰胺(AM)聚合得到高强度的PANI-PAA/PAM导电水凝胶。通过力学性能及电化学性能测试,发现该导电水凝胶具有良好的力学性能和电化学性能。当以十二烷基硫酸钠(SDS)为分散剂时,其电导率可达4.63 S·m^(-1),可承受压缩应力1.33 MPa(压缩耗散能为85.50 kJ·m^(-3)),拉伸断裂伸长率达964%,相应的断裂强度为0.25 MPa;而以NaOH为分散剂时,凝胶的电导率可达4.19 S·m^(-1),可承受压缩应力1.13 MPa(压缩耗散能为73.45 kJ·m^(-3)),拉伸断裂伸长率达896%;相应的断裂强度为0.14 MPa。该研究为高强度聚苯胺基导电水凝胶的制备提供了思路。The conductive polymer-based conductive hydrogels which introduced conductive polymers into the hydrogel network have been extensively studied because of the combination of three-dimensional network structure,good biocompatibility,excellent mechanical properties and electrical properties,especially the conductive hydrogels with polyaniline(PANI)as conductive polymer.However,PANI is insoluble in water,so it is difficult to prepare PANI-based conductive hydrogels.In order to prepare high-strength PANI based conductive hydrogels,this paper attempted to graft PANI onto the hydrophilic polymer polyacrylic acid(PAA)to obtain a PANI-PAA conductive composite that could be uniformly dispersed in water,and then it was polymerized with polyacrylamide(PAM)to obtain a strong PANI-PAA/PAM conductive hydrogel.Through mechanical and electrochemical tests,it is found that the conductive hydrogel has good mechanical and electrochemical properties.When SDS was used as dispersant,the conductivity could reach 4.63 S·m^(-1),meanwhile,it could withstand compression stress of 1.33 MPa(corresponding dissipation energy of compression is 85.50 kJ·m^(-3)),the elongation at break is 964%,and the corresponding breaking strength is 0.25 MPa.Under the condition of NaOH as dispersant,the conductivity could reach 4.19 S·m^(-1),and it could bear the compression stress of 1.13 MPa(corresponding dissipation energy of compression is73.45 kJ·m^(-3)),the tensile elongation at break reaches 896%,and the corresponding fracture strength is 0.14 MPa.This study provides ideas for the preparation of high-strength polyaniline-based conductive hydrogels.

关 键 词：导电水凝胶 高强度水凝胶 聚苯胺 聚丙烯酸 导电复合物 

分 类 号：TB322[一般工业技术—材料科学与工程] TQ427.2[化学工程]