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NANOMATERIALS AND NANOTECHNOLOGY
ArticleName Finely Divided Methylsilsesquioxane Particles with SiO4/2 — Fragments in Structure
ArticleAuthor P. A. Averichkin, Y. B. Andrusov, I. A. Denisov, T. B. Klytchbaev, Y. N. Parkhomenko, N. A. Smirnova,
ArticleAuthorData

Federal State Research and Design Institute of Rare Metal Industry

P. A. Averichkin, Y. B. Andrusov, I. A. Denisov, Y. N. Parkhomenko, N. A. Smirnova

 

Chemical and Metallurgical Holding «Metal»

T. B. Klytchbaev

Abstract

The results of structural and morphological investigations of methylsilsesquioxane finely divided particles synthesized by hydrolytical co−condensation of methyltrichlorosilane and tetrachlorous silicon alcocksilined «in situ» are presented. The silica−type hydrophobe particles were obtained using above mentioned method with the result of 98.7—99.4 % (mass) compared to load. These particles were identified as crystalline formations with lattice period of 5.5—8.0 nm and inter−planery distance 0.92—1.04 nm in near order. It is shown that in contrast to well−known crystalline methylsilsesquioxanes introduction of chemically bonded SiO4/2 fragments in material structure leads to formation of 2—3 micrometer−size spherical particles from primarily existed 10—15 nm particles; these namely particles are responsible for spherical surface morphology. The method of extraction of siloxane nano−particles (2.5—280 nm) from products of reaction was described; the behavior of particles in suspension was studied and particle dimensional parameters were determined with the help of helium−neon 0.6328 nm laser correlation spectroscopy.

keywords Methylsilsesquioxanes, silicon−organic compounds, siloxane particles, hydrolysis, suspension, laser correlation spectroscopy, electron scanning microscopy, crystalline nanoparticles
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