基于甜菜碱的两性离子导电水凝胶的合成及性能  

Synthesis and properties of zwitterionic conductive hydrogels based on betaine

作　　者：石奋玲 杜莹 逯帅帅 田若冰 孙元娜 SHI Fenling;DU Ying;LU Shuaishuai;TIAN Ruobing;SUN Yuanna(School of Materials Science and Engineering,Xi'an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048

出　　处：《印染》2023年第1期49-52,共4页China Dyeing and Finishing

基　　金：大学生创新创业计划项目(S202110709032);陕西省教育厅自然专项(21JK0658);陕西省高校科协青年人才托举计划项目(20210421)。

摘　　要：采用自由基聚合法,以两性离子甲基丙烯酰乙基磺基甜菜碱(SBMA)和非离子型丙烯酰胺(AAm)为单体,N,N-亚甲基双丙烯酰胺(MBAA)为交联剂,过硫酸钾(KPS)为引发剂,成功制备了两性离子导电水凝胶。研究表明:制备的导电水凝胶具有一定的溶胀性能(平衡溶胀率为4.39)和力学强度(拉伸强度为0.045 MPa);由于阴阳离子的存在,网络中的静电相互作用和氢键有利于离子迁移,使其具有优异的导电性能(电导率为0.69 S/cm);随着体系中AAm含量的增加,凝胶的力学性能不断增加,电导率不断减小,溶胀性能呈现先增加后减小的趋势。Amphoteric ionic conductive hydrogels are successfully prepared by free radical polymerization with amphoteric methacryloyl ethyl sulfobetaine(SBMA)and nonionic acrylamide(AAm)as monomers,N,N-methylenebisacrylamide(MBAA)as a crosslinker,and potassium persulfate(KPS)as an initiator.The results show that the conductive hydrogels have certain swelling properties(equilibrium swelling rate of 4.39)and mechanical strength(tensile strength of 0.045 MPa),and due to the presence of anions and cations,the electrostatic interactions in the network provide abundant conductive pathways to make them have excellent electrical conductivity(conductivity of 0.69 S/cm).Along with the increase of AAm content,the mechanical properties of the gel keep increasing,the conductivity keeps decreasing,and the swelling properties show a trend of first increasing and then decreasing.

关 键 词：水凝胶 两性离子 导电性 溶胀性 甜菜碱 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]