采用正硅酸四乙酯(TEOS)以溶胶-凝胶法制备了粒径为100 nm的二氧化硅溶胶颗粒,以氨丙基三乙氧基硅烷(KH-550)、γ-二乙烯三胺丙基甲基二甲氧基硅烷(KH-603)作为纳米颗粒团聚体和附着力促进剂,使用十六烷基三甲氧基硅烷(HDTMS)对二氧化硅溶胶进行疏水处理得到改性溶胶颗粒,再以热塑性聚氨酯(TPU-95A)树脂为粘结剂,制备超疏水复合涂层.采用静态接触角(CA)、红外光谱(FT-IR)、粒径分布、透射电镜(TEM)对改性颗粒和涂层进行表征.结果表明:当KH-550与KH-603质量比为7∶3,TEOS与TPU-95A质量比为27.76∶1时,水滴在超疏水复合涂层的静态接触角高达152.,将此材料运用在真石、质感涂料上能够赋予涂层超疏水特性,使涂层具备耐沾污自清洁的功能.
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