羧乙基微纤化纤维素/石墨烯/聚苯胺复合膜的制备与表征

Preparation and Characterization of Carboxyethyl Microfibrillated Cellulose/Graphene/Polyaniline Composite Film

关键词:  羧乙基微纤化纤维素  石墨烯  聚苯胺  复合膜  协同作用

Key Words:carboxyethylmicrofibrillated cellulose  graphene  polyaniline  composite film  synergistic effect

摘要:以羧乙基微纤化纤维素为基体，分别采用物理混合法、化学原位吸附聚合法以及物理共混与化学原位吸附聚合相结合的方法经棒涂成型制备了羧乙基微纤化纤维素/石墨烯复合膜、羧乙基微纤化纤维素/聚苯胺复合膜和羧乙基微纤化纤维素/石墨烯/聚苯胺复合膜，对复合膜的微观形貌、化学结构、耐水性、热稳定性、力学性能和电化学性能进行了表征。结果表明，羧乙基微纤化纤维素具有良好的成膜性，可起载体和分散剂的作用。复合石墨烯或聚苯胺后，复合膜的力学性能和电化学性能明显增加。石墨烯可提高膜的热稳定性，聚苯胺可增加膜的耐水性。另外，当10%的石墨烯和30%的聚苯胺复合时，还会对羧乙基微纤化纤维素/石墨烯/聚苯胺复合膜的电化学性能产生协同增效的作用。

Abstract:In this study， carboxyethyl microfibrillated cellulose/graphene composite film， carboxyethyl microfibrillated cellulose/polyaniline composite film， and carboxyethyl microfibrillated cellulose/graphene/polyaniline composite film were prepared respectively by physical mixing method， chemical in-situ adsorption polymerization method， and the combination of physical blending and chemical in-situ adsorption polymerization method using coating forming method with carboxyethyl microfibrillated cellulose as matrix. The micro morphology， chemical structure， hydrophobicity， thermal stability， mechanical and electrochemical properties of the film were characterized. The results showed that carboxyethyl microfibrillated cellulose had good film-forming property and could act as carrier and dispersant. After compounding graphene or polyaniline， the mechanical and electrochemical properties of the composite film increased significantly， among which， graphene could improve the thermal stability of the film， while polyaniline could increase the hydrophobicity of the film. In addition， when 10% graphene and 30% polyaniline were compounded， it showed a synergistic effect on the electrochemical properties of the carboxyethyl microfibrillated cellulose/graphene/polyaniline composite film.