聚苯胺/环氧复合阴极电泳涂料防腐蚀性能的研究  

Corrosion Pr otective Performance of PAN/Epoxy Hybrid Cathodic Electrodeposition Coatings

作　　者：齐圣光[1] 陈庆礼[1] 任碧野[1] 王朝阳[1] 刘新星[1] 童真[1] 

机构地区：[1]华南理工大学材料科学研究所,广州510640

出　　处：《涂料工业》2006年第7期4-7,10,共5页Paint & Coatings Industry

基　　金：广东省自然科学基金团队项目资助课题(015036)

摘　　要：运用插层聚合的方法制备了蒙脱土/聚苯胺复合材料,并进行了表征。将该复合材料通过共混的方式加入聚酰胺/环氧阴极电泳(CED)涂料中配制成聚苯胺/环氧复合阴极电泳涂料,并利用电化学阻抗谱方法对各电泳涂层的防腐性能进行了分析。研究发现:在3.5%NaC l溶液中浸泡10 d后,腐蚀介质不能到达涂层/基底金属界面,金属表面没有发生腐蚀反应。随着聚苯胺含量的增加,复合电泳涂膜的阻抗值增加,具有较好的防腐性能。当聚苯胺含量相同时,与掺杂态聚苯胺复合电泳涂膜相比,本征态聚苯胺复合电泳涂膜具有很高的阻抗值,表现出更好的防腐性能。Polyaniline/monmorillonite （PAN/MMT） composite was prepared by intercalative polymerization, which is characterized by XRD and FT- IR spectra. The PAN/epoxy electrodeposition coatings was prepared by blending of PAN/MMT composite with epoxy - polyamide cathodic electrodeposition （CED） coatings. The corrosion resistance performance of the films was studied by electrochemical impedance spectroscopy （EIS） test. The Nyquist plots showed that the films of PAN/epoxy blended coatings have better protective properties after immersed in the 3.5wt% NaC1 solution for 10 days. The EIS value of the film increases with the amount of polyaniline up. The CED films of PAN （emeraldine base ） /epoxy exhibit better anticorrosion performance than those of PAN（emeraldine salt ） /epoxy blended coatings.

关 键 词：插层聚合 聚苯胺 环氧树脂 阴极电泳涂料 电化学阻抗谱 

分 类 号：TQ630.7[化学工程—精细化工]