Synthesis and Properties of Fumed Silicas Modified with Mixtures of Poly(methylphenylsiloxane) and Dimethyl Carbonate

Iryna S. Protsak^1*, Valentyn A. Tertykh¹, Yulia M. Bolbukh¹, Dariusz Sternik², Anna Derylo-Marczewska²

¹Department of Chemisorption, Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kiev, Ukraine.
²Faculty of Chemistry, Maria Curie-Sklodowska University, Lublin, Poland.

DOI: 10.4236/wjnse.2015.54017                

Abstract

Effect of the concentration ratios of organosiloxane/initiator and treatment temperature on the characteristics of hydrophobic products obtained by modification of surface of fumed silica with poly(methylphenylsiloxane) (PMPS) in the presence of dimethyl carbonate has been studied. Morphology, particle size, surface area and coating microstructure of modified silicas were analyzed by methods of transmission electron and atomic force microscopies, nitrogen adsorption-desorption data. Carbon contents in the grafted modifying layer of organosilicas were determined using IR spectroscopy and elemental analysis. Hydrophilic-hydrophobic properties of surface of the obtained modified silicas were estimated by measurements of contact angles of wetting. It was shown that modification of pyrogenic silicas with mixtures of poly(methylphenylsiloxane) and dimethyl carbonate allows to obtain the homogeneous hydrophobic products and serve their nanodispersity.

Keywords

Fumed Silica, Poly(methylphenylsiloxane), Dimethyl Carbonate, Surface Modification, Hydrophilic-Hydrophobic Properties

Conflicts of Interest

The authors declare no conflicts of interest.

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