以改性硅溶胶与丙烯酸酯类单体原位聚合,采用单体预乳化、半连续滴加法制备了高硅含量纳米SiO2/聚丙烯酸酯复合乳液,研究了纳米SiO2和甲基丙烯酸(MAA)的用量、乳化剂配比和乳液固含量对乳液性能的影响,利用红外光谱、热重分析等方法对乳液结构和热稳定性进行了表征,测试了乳胶膜的性能.当SiO2用量为20％,乳化剂中m(OP- 10):m(DNS-86)=1∶3,功能性单体MAA用量为5％,乳液固含量为40％时,可制得稳定性良好的纳米SiO2/聚丙烯酸酯复合乳液,其涂膜硬度为6H,附着力1级,耐磨性达2 500 r,且具有良好的耐水性和耐热性.
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