中空TiO2微球的制备及其对聚丙烯酸酯薄膜保温性能的影响

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。

Fabrication of Hollow TiO2 Spheres and Their Effect on Thermal Insulation Property of Polyacrylate Film

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 conductivity and mechanical property of composite film were investigated. The results show that hollow TiO₂ microspheres can significantly improve the properties of polyacrylate film. The hollow size and dosage of hollow TiO₂ microspheres have different degree influence on properties of composite film. The properties of composite film firstly increase 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.