为了提高聚苯胺乳液的成膜性、附着力和防腐蚀性能,以丙烯酸酯乳胶粒子为种子,采用核壳乳液聚合法制备丙烯酸酯-苯胺核壳共聚乳液,直接将其涂刷在Q235钢表面成膜.分析了核壳共聚机理,用红外光谱(FTIR)和透射电子显微镜(TEM)对共聚物的结构及形貌进行了表征;通过接触角、吸水率、附着力、Tafel曲线及电化学阻抗谱测试研究了苯胺用量对涂层疏水性、附着力和防腐蚀性能的影响.结果表明:制备的核壳共聚乳液乳胶粒子具有明显的核壳结构;当苯胺用量为1.00％时,核壳共聚乳液涂层的水接触角为81.2°,附着力为1级,腐蚀电流密度仅为10-8.0 A/cm2,电化学阻抗值达到了105 Ω,具有良好的防腐蚀性能.
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