Hybrid silica bearing different organosilanes produced by the modified Stober method

被引：30
作者：
Barrera, Eliana Galland [1 ]
Livotto, Paolo R. [1 ]
dos Santos, Joao H. Z. [1 ]
机构：
[1] Univ Fed Rio Grande do Sul, Inst Quim, Ave Bento Goncalves 9500, BR-91500000 Porto Alegre, RS, Brazil
来源：
POWDER TECHNOLOGY | 2016年 / 301卷
关键词：
Hybrid silica; Stober method; Spherical nanoparticles; Organosilane; PARTICLES; SIZE; GROWTH; ALKYL; NANOPARTICLES; CATALYSTS; SURFACES; EXCHANGE; SPHERES;
D O I：
10.1016/j.powtec.2016.04.025
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The Stoner method was used to prepare a variety of functionalized silica through the reaction of tetraethyl orthosilicate (TEOS) and several organosilanes. The organosilanes differed in the number of carbons in the alkyl chain as well as in the functional groups. The TEOS: organosilane ratio employed was 90:10 M. The resulting materials were characterized by nitrogen adsorption-desorption porosimetry, small angle X-ray scattering, scanning electron microscopy, transmission electron microscopy, contact angle measurements and Fourier transform infrared spectroscopy. Spherical functionalized silica microparticles approximately 0.5 mu m in size with increased hydrophobicity were obtained. The adsorption-desorption isotherms were independent of the nature of the organosilane employed and can be classified as type II, typical of nonporous solids. The contact angle was between 0 and 153. The presence of organic moieties on the silica can modify the morphology and the hydrophilicity of the materials produced by the Stober method. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：486 / 492
页数：7
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