摘要
为提高聚苯胺(PAn)涂料耐强烈的腐蚀介质的性能,运用插层复合的方法用苯胺(An)和蒙脱土(MMT)制备出了PAn MMT复合材料。经XRD和SEM分析表明,该复合材料中的蒙脱土d001面层间距已完全消失,以纳米数量级片层结构分散在聚苯胺中;在NaCl质量含量为3.5%的腐蚀环境中,用恒电位仪测定以该复合纳米材料作为冷轧钢涂层的腐蚀电流,正交实验表明:当聚合温度为25℃,n(过硫酸铵)∶n(苯胺)=1∶1、wMMT=0.5%、掺杂剂为0.03mol/L磺基水杨酸(SSA)时产品的溶解度较大,成膜性较好,其腐蚀电流为2.1μA,明显优于纯聚苯胺作为涂层的18μA和冷轧钢的23μA;在相同的腐蚀环境中电化学阻抗谱(EIS)证明以PAn MMT复合纳米材料为底漆,环氧树脂为面漆防腐蚀效果较纯环氧树脂好,其中以wMMT=0.75%制成的PAn MMT复合纳米材料底漆,防腐蚀效果最好。
Polyaniline\|monmorillonite (PAn\|MMT) nanocomposite material was prepared by the way of intercalative polymerization to improve the anticorrosion property of PAn coating. The XRD and SEM results indicated that the d001 layer space of MMT disappeared and nano\|scale MMT was dispersed in the PAn material. The corrosion current of composite material as coating of cold\|roll steel (CRS) in the 3.5wt% NaCl solution was measured by potentiostat. Orthogonal experiment indicated that when the polymerization temperature was 25 ℃, n(APS)/n(An) was 1∶1, wMMT was 0.5%, and doping reagent was 0.03 mol/L SSA, the solubility of product was bigger and the film\|forming property was better. The corrosion current of coating was 2.1 μA in advantage over that 18 μA of pure polyaniline and 23 μA of pure CRS. In the same corrosion environment EIS proved that the coating with PAn\|MMT nanocomposite material as substrate and epoxy resin as outside was better than pure epoxy resin, among which the corrosion resistance of coating that using PAn\|MMT made from 0.75% wMMT was best.
出处
《材料保护》
CAS
CSCD
北大核心
2003年第7期25-27,33,共4页
Materials Protection
关键词
插层复合
纳米复合
蒙脱土
聚苯胺
防腐蚀性能
intercalative polymerization
nanocomposite
monmorillonite
polyaniline
anticorrosion property
