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

doi:10.15541/jim20160488

摘要/Abstract

摘要：

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。

关键词: 中空二氧化钛微球, 聚丙烯酸酯, 复合薄膜, 保温性能, 力学性能

Abstract:

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.

Key words: Hollow TiO₂ spheres, polyacrylate, composite film, thermal insulation, mechanical property

中图分类号:

TB34

鲍艳, 康巧玲. 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[J]. 无机材料学报, 2017, 32(6): 581-586.

BAO Yan, KANG Qiao-Ling. Fabrication of Hollow TiO₂ Spheres and Their Effect on Thermal Insulation Property of Polyacrylate Film[J]. Journal of Inorganic Materials, 2017, 32(6): 581-586.

图/表 10

图1 中空TiO2微球的SEM及TEM照片

Fig. 1 SEM and TEM images of hollow TiO2 spheres(a, b) SEM images; (c, d) TEM images

图2 中空TiO2微球的XRD谱图

Fig. 2 XRD pattern of hollow TiO2 spheres

图3 中空TiO2微球空心粒径对聚丙烯酸酯薄膜导热系数的影响

Fig. 3 Effect of hollow cavity of hollow TiO2 spheres on thermal conductivity of polyacrylate film(a) Pure polyacrylate film; (b-f) Composite films containing hollow TiO2 spheres with hollow diameter of 150, 200, 300, 400, and 500 nm, respectively

图4 (a)纯聚丙烯酸酯薄膜(b)聚丙烯酸酯/中空TiO2微球复合薄膜的截面SEM照片

Fig. 4 SEM images of (a) polyacrylate thin films and (b) composite thin films

表1 中空TiO2微球的比表面积、孔体积及平均孔径

Table1 Specific surface area, pore volume, average pore size of hollow TiO2 spheres samples

Sample	S_BET/(m²·g^-1)	Pore volume / (cm³·g^-1)	Pore size / nm
150 nm	58.2790	0.005458	33.2
500 nm	50.9239	0.002651	14.5

图5 中空TiO2微球空心粒径对聚丙烯酸酯薄膜光反射率的影响

Fig. 5 Effect of hollow cavity of hollow TiO2 spheres on light reflectivity of polyacrylate film(a) Pure polyacrylate film; (b-f) Composite films containing hollow TiO2 spheres with hollow diameter of 150, 200, 300, 400, and 500 nm, respectively

图6 中空TiO2微球空心粒径对聚丙烯酸酯薄膜力学性能的影响

Fig. 6 Effect of hollow cavity of hollow TiO2 spheres on tensile strength and elongation at break of polyacrylate film(a) Pure polyacrylate film; (b-f) Composite films containing hollow TiO2 spheres with hollow diameter of 150, 200, 300, 400, and 500 nm, respectively

图7 中空TiO2微球用量对聚丙烯酸酯薄膜导热系数的影响

Fig. 7 Effect of hollow TiO2 spheres content on thermal conductivity of polyacrylate film(a) Pure polyacrylate film; (b-e) Composite films containing hollow TiO2 spheres of 1%, 2%, 3% and 4%, respectively

图8 中空TiO2微球用量对聚丙烯酸酯薄膜光反射率的影响

Fig. 8 Effect of hollow TiO2 spheres content on light reflectivity of polyacrylate film(a) Pure polyacrylate film; (b-e) Composite films containing hollow TiO2 spheres of 1%, 2%, 3% and 4%, respectively

图9 中空TiO2微球用量对聚丙烯酸酯薄膜抗张强度与断裂伸长率的影响

Fig. 9 Effect of hollow TiO2 spheres content on tensile strength and elongation at break of polyacrylate film(a) Pure polyacrylate film; (b-e) Composite films containing hollow TiO2 spheres of 1%, 2%, 3% and 4%, respectively

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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

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

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