Preparation and Thermal Insulation Property of Yolk-shell Structure Hollow Silica Nanospheres

被引：0

作者：

Li F. ^{[1
]}

Yang Y. ^{[1
]}

Wei J. ^{[1
]}

Yu Q. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, South China University of Technology, Guangzhou

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 09期

关键词：

Hard-template; Hollow silica nanospheres; Polystyrene sphere; Thermal insulation properties;

D O I：

10.14062/j.issn.0454-5648.20200973

中图分类号：

学科分类号：

摘要：

Yolk-shell structure hollow silica nanospheres were prepared with TEOS as a silica precursor and polystyrene sphere as a template by a continuous hard-template wrapping synthesis method and subsequent high temperature calcining. The structure, morphology and properties of the as-synthesized products were characterized by zeta potential analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption-desorption isotherm and thermal conductivity analysis. The thermal insulation properties of acrylate coating with yolk-shell structure hollow silica nanospheres were investigated. The results show yolk-shell structure hollow silica nanospheres with 20-290 nm layer space have a petal-like morphology. The thermal conductivity is 0.0500-0.0650 W•m-1•K-1, which increases with the increase of inner core particle size. The incorporation of yolk-shell structure hollow silica nanospheres into acrylate coating can effectively reduce the thermal conductivity of the coating, which can be reduced by more than 70% at the incorporation content of 8%. Compared to single shell hollow silica nanospheres, yolk-shell structure hollow silica nanospheres have a decreased thermal conductivity of the coating and a better thermal insulation performance. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：2017 / 2024

页数：7

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