导电聚苯胺的改性方法及其在防腐涂层中的应用

Modification and application of conductive PANI in anti-corrosion coating

传统防腐涂层对以点蚀为主的电化学腐蚀无能为力,而导电聚苯胺及复合材料因其优异的导电性、化学稳定性和自发钝化特性在金属防腐领域受到广泛关注,尤其在导电聚苯胺中引入超疏水性后,不仅实现了同时高效减缓化学腐蚀和电化学腐蚀的目的,而且弥补了传统防腐涂层不能抗点蚀的不足。介绍了导电聚苯胺的结构性质、导电聚苯胺的改性方法和超疏水导电聚苯胺复合材料的防腐蚀理论,重点综述了导电聚苯胺的改性方法,分析总结了不同改性方法的优点及可能存在的问题,并对超疏水导电聚苯胺的未来改性研究方向提出了展望。

Traditional anti-corrosion coatings are inefficient to pitting corrosion,which is the main type of electrochemical corrosion.Conductive polyaniline(PANI)and its composite materials have caused extensive attentions in metal anti-corrosion fields due to the excellent conductivity,chemical stability and spontaneous passivation.Especially,when the superhydrophobicity is introduced into the PANI,the purpose of reducing chemical corrosion and electrochemical corrosion at the same time can be achieved,which can make up for the shortcomings of traditional anticorrosion coatings that cannot resist pitting corrosion.The structures and properties of the conductive PANI,the modification methods and the anti-corrosion theories of superhydrophobic-conductive PANI composite materials were introduced.It focused on the modification methods of the conductive PANI,the advantages and possible problems of different modification methods were analyzed and summarized.Furthermore,the modification research directions of superhydrophobic-conductive PANI were proposed.