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以不同含水量细菌纤维素为模板,苯胺单体为原料原位聚合生成聚苯胺,制备出不同含水量细菌纤维素/聚苯胺(HBC/PANI、LBC/PANI及DBC/PANI)复合凝胶膜,系统研究了细菌纤维素凝胶膜含水量和反应时间对苯胺原位聚合以及复合凝胶膜微观形貌、电学性能和力学性能的影响.扫描电镜照片表明聚苯胺均匀包覆在BC纤维上形成导电网络结构;四探针测试表明聚合时间90 min时导电率最高;低含水量加快了聚合反应速度,提高了复合凝胶膜的电导率,而完全干燥则使电导率降低;交流阻抗测试也表明低含水量可以明显提高材料的离子导电性;力学性能测试结果表明了BC/PANI复合凝胶膜具有良好的机械性能,抗拉强度可达0.21 MPa,同时低含水量不会降低复合凝胶膜的力学性能.
Polyaniline was prepared by in situ polymerization of bacterial cellulose with different water contents as template and aniline monomer as raw materials to prepare composite gel films with different water contents of bacterial cellulose / polyaniline (HBC / PANI, LBC / PANI and DBC / PANI) , The effects of water content and reaction time of bacterial cellulose gel membrane on the in situ polymerization of aniline and the morphology, electrical and mechanical properties of the gel films were investigated systematically.The scanning electron micrographs showed that polyaniline was uniformly coated on BC fibers The formation of conductive network structure; four-probe test showed that the polymerization time 90 min, the highest conductivity; low water content to speed up the polymerization reaction rate, improve the conductivity of the composite gel film, and completely dry conductivity is reduced; AC impedance test The results also show that the mechanical properties of BC / PANI composite gel films have good mechanical properties and tensile strength up to 0.21 MPa, while the low water content does not reduce the ionic conductivity of the composites Film mechanical properties.