以有机硅聚丙烯酸为成膜物质,经γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH-570)表面化学改性后的纳米SiO2粒子(经甲苯-2,4-二异氰酸酯活化)为无机填料,制备纳米SiO2/有机硅聚丙烯酸复合防冰涂层.利用红外测试(FT-IR)、热失重(TGA)、扫描电镜(SEM)等研究了纳米SiO2表面化学改性的机制,探讨了纳米SiO2用量对涂层表面形貌、浸润性及涂层与冰层之间粘附性能的影响.结果表明,KH-570化学改性提高了纳米SiO2在涂层中的分散性并有效地提高了涂层表面的疏水性能,当KH-570化学改性后的纳米SiO2用量为8％时,涂层表面水的接触角为150.,呈现超疏水特性;涂层与冰层之间粘附力随纳米SiO2用量增加呈现下降趋势,当纳米SiO2用量为8％时,涂层与冰层之间的粘附力仅为树脂涂膜的30％左右.KH-570化学改性后的纳米SiO2与低表面能有机硅聚丙烯酸树脂的协同效应使涂层具有了良好的疏水防冰性能.
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