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

• 作者: Anna Derylo-Marczewska Dariusz Sternik Iryna S. Protsak Valentyn A. Tertykh Yulia M. Bolbukh
• 来源期刊: 纳米科学与工程(英文)
• 学科: 化学
• 关键词: Fumed SILICA Poly(methylphenylsiloxane) DIMETHYL CARBONATE Surface Modification Hydrophilic-Hydrophobic Properties
• 年，卷（期）: 2015,（4）
• 页码范围: 152-160
• 页数: 9页
• 分类号: O6

摘要

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.