采用浸没法对实验室自制的等规聚丙烯(iPP)/纳米TiO2粒子共混微孔平板膜进行表面改性,探讨了纳米硅乳液浓度和反应温度等条件对改性膜的形态结构以及疏水性的影响,得到了纳米硅乳液改性iPP/TiO2超疏水微孔膜制备的最佳条件,并测试了纳米硅乳液改性iPP/TiO2超疏水微孔膜的自清洁性能、pH稳定性以及VMD稳定性.研究结果表明,纳米硅乳液改性iPP/TiO2超疏水-自清洁微孔膜制备的最佳条件为:UV光催化30 min,纳米硅乳液质量数为20%,反应温度为室温,最后置于80℃烘箱烘干2h.此时制备的纳米硅乳液改性iPP/TiO2超疏水微孔膜接触角达到153.2°,滚动角小于10°,并且具有优异的自清洁和pH稳定性能、VMD稳定性以及抗润湿和抗污染性能.
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