二氧化锰氧化法合成聚苯胺/二氧化硅复合粒子用于防腐涂料的研究  

Synthesis of Polyaniline/Silica Composite Particles Using Manganese Dioxide and Its Application for Anti-Corrosion Coatings

作　　者：何秦[1] 司士辉[1] 梁丰[1] 赵坤[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《涂料工业》2009年第2期37-40,45,共5页Paint & Coatings Industry

摘　　要：以二氧化锰代替过硫酸铵氧化苯胺单体,并在聚合反应体系中添加适当比例的二氧化硅粒子,制备出不同酸掺杂的聚苯胺包覆二氧化硅复合粒子。扫描电子显微镜(SEM)观察表明,二氧化硅表面及其粒子之间明显包覆一层聚苯胺(PANI);并比较不同酸掺杂的聚苯胺复合粒子的傅里叶变换红外光谱(FT-IR),证明了掺杂的有效性。将合成的聚苯胺复合粒子作为防腐填料,加入环氧树脂作为成膜物,制备出的聚苯胺/环氧树脂复合涂料涂覆在碳钢基体上,采用加速浸泡实验、开路电位法、Tafel极化曲线研究其防腐性能。实验结果表明:H2SO4掺杂的聚苯胺复合涂层具有优良的防腐性能,该复合涂层的腐蚀电位较环氧树脂涂层提高400 mV,腐蚀电流下降4~5个数量级,是一种低成本、高性能防腐涂料。A polyaniline at the presence of different acids was prepared by using manganese dioxide instead of the ammonium persulfate oxidant,which was used to coat silica particles by adding the proper proportion of silica particles during polymerization.Results of Scanning electron microscopy(SEM) showed that PANI layer was coated on the surface of silica particles,and the fourier transform infrared spectroscopy(FT-IR) of different acids blended PANI composite particles showed the effectiveness of blending.Anti-cor...

关 键 词：二氧化锰 聚苯胺 二氧化硅 防腐涂料 

分 类 号：TQ637[化学工程—精细化工]