Modified fluorine-containing silicone oil and preparation method thereof

The invention discloses modified fluorine-containing silicone oil and a preparation method thereof. The preparation method of the modified fluorine-containing silicone oil comprises the following steps: firstly reacting hydrogen-containing dichloromethylsilane which serves as a starting material, chloroplatinic acid which serves as a catalyst and octavinyl polyhedral oligomeric silsesquioxane (POSS) to synthesize a vinyl polyhedral oligomeric silsesquioxane dichloromethylsilane monomer; then carrying out hydrolysis co-balance by the monomer, dimethyldichlorosilance and trimethylchlorosilane to prepare vinyl polyhedral oligomeric silsesquioxane side group silicone oil; and finally carrying out single electron transfer reaction (SET) by vinyl and perfluoroalky iodide in a vinyl polyhedral oligomeric silsesquioxane structure of the side group to prepare the modified fluorine-containing silicone oil. According to the modified fluorine-containing silicone oil, octavinyl polyhedral oligomeric silsesquioxane is added in a side chain of the silicone oil, so that the heat resistance of the silicon oil is improved; by virtue of the fluoroalkylation reaction, the surface tension of the fluorine-containing silicone oil is reduced. The modified fluorine-containing silicone oil is excellent in water and oil repellency and resistance to high temperature; the high-temperature-resistant fluorine-containing silicone oil is mild in reaction conditions, simple and convenient tin preparation process and easily available in raw materials, and is suitable for industrial production.