摘要： 以正硅酸四乙酯、3-缩水甘油基氧基丙基三甲氧基硅烷、全氟癸基三乙氧基硅烷、纳米硅溶胶等为原料制备了低表面能的纳米复合涂层,并对涂层的热稳定性和表面性能进行了测试。热重分析结果表明,涂层热稳定性高,其最大热失重温度为522℃;扫描电镜照片显示涂层表面光滑致密,无微孔开裂;涂层具有良好的疏水疏油性,水接触角达111.2°,乙二醇、二甲苯、植物油无法在其表面铺展,涂层的表面能为18.82 mN·m^-1;点蚀试验结果显示,浓盐酸24 h未能腐蚀涂层,同时涂层显示出极佳的防涂鸦耐沾污性。

关键词: 纳米复合涂层, 低表面能, 耐热性, 耐沾污

Abstract: Low surface energy nanocomposite coating was prepared using tetraethyl orthosilicate, (3-glycidyloxypropyl) trimethoxysilane perfluorodecyltriethoxysilane and nano-silicasol as raw materials. Thermal stability and surface properties were tested and the results showed that the coating had good thermal resistance, with its maximum weight loss rate temperature of 522 ℃. The coating surface was smooth and no micro pores and cracks were observed from scanning electron microscope images. Surface with water contact angle up to 111.2° and surace energy value down to 18. 82 mN.m^-1 was obtained, meanwhile, propylene glycol, xylene and vegetable oil cannot spread out on the surface, indicating admirable hydrophobic and oleophobic performances. The coating was not destroyed by drops of concentrated hydrochlorice acid for 24 h and also displayed excellent graffiti resistance.

Key words: nanocomposite coating, low surface energy, heat resistance, graffiti resistance