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Journal of Materials Science
Erschienen in: Journal of Materials Science 24/2014

01.12.2014 | Original Paper

Fabrication of hollow silica spheres and their application in polyacrylate film forming agent

verfasst von: Yan Bao, Yongqiang Yang, Chunhua Shi, Jianzhong Ma

Erschienen in: Journal of Materials Science | Ausgabe 24/2014

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Abstract

Polystyrene (PS)/silica core/shell spheres were fabricated using mono-dispersed PS as templates by hydrolysis and condensation of two different silica precursors. The PS cores of PS/silica core/shell spheres were dissolved subsequently in the tetrahydrofuran medium to form mono-dispersed hollow silica spheres. The structures and morphologies of hollow silica spheres were characterized by scanning electron microscopy and transmission electron microscopy. Then, polyacrylate/hollow silica composite film forming agents were prepared via physical blending of polyacrylate and two different hollow silica spheres, and the water vapor permeability of their films were compared. The results showed that the structure of hollow silica spheres were very typical and obvious. The silica shell was continuous and uniform using tetraethylorthosilicate as precursor, which was accumulated by many silica seeds with size of 10–20 nm, and the thickness of silica shell was about 16.7 nm. However, the hollow silica spheres using tetraethylorthosilicate and vinyl triethoxysilane as precursors had mesoporous structure in the shell. The introduction of hollow silica spheres could significantly improve the water vapor permeability of polyacrylate film. At last, a possible mechanism for the formation of hollow silica spheres was proposed and the process of water vapor through polyacrylate/hollow silica composite films was modeled.
Nächster Artikel Environment segregation of Er3+ emission in bulk sol–gel-derived SiO2–SnO2 glass ceramics

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Metadaten
Titel
Fabrication of hollow silica spheres and their application in polyacrylate film forming agent
verfasst von
Yan Bao
Yongqiang Yang
Chunhua Shi
Jianzhong Ma
Publikationsdatum
01.12.2014
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 24/2014
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-014-8530-7

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