以阳离子PS微球为模板,钛酸四丁酯为钛源,氨水为催化剂制备中空TiO2微球,通过物理共混法将中空TiO2微球引入到聚丙烯酸酯薄膜中,考察了中空TiO2微球的空心粒径及用量对复合薄膜光反射性、导热系数及力学性能的影响.结果表明:中空TiO2微球的引入可显著提升聚丙烯酸酯薄膜的各项性能,中空TiO2微球的空心粒径和用量对复合薄膜的性能有不同程度的影响,随着中空TiO2微球空心粒径和用量的增加,复合薄膜的性能基本呈现先提升后降低的趋势,其中当中空TiO2微球空心粒径为300 nm、用量为1%时,所制备的复合薄膜保温性能和力学性能最优.
Hollow TiO2 microspheres were fabricated with PS as template, tetrabutyl titanate as titanium resource and ammonium as catalyst. Then, hollow TiO2 microspheres were introduced into polyacrylate emulsion by physical blending method. The effect of hollow size and dosage of hollow TiO2 microspheres on light reflection, thermal con-ductivity and mechanical property of composite film were investigated. The results show that hollow TiO2 micro-spheres can significantly improve the properties of polyacrylate film. The hollow size and dosage of hollow TiO2 mi-crospheres have different degree influence on properties of composite film. The properties of composite film firstly in-crease and then decrease with increasing of hollow size and dosage of hollow TiO2 microspheres. When the hollow diameter and the dosage of hollow TiO2 microspheres is 300 nm and 1%, respectively, the thermal insulation properties and mechanical properties of the composite membrane are optimal.
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