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

doi:10.15541/jim20160488

Abstract

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

CLC Number:

TB34

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.

Figures/Tables 10

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

Fig. 2 XRD pattern of hollow TiO2 spheres

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

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

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

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

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

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

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

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

References 40

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

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