HVDC / manufacturing method of the silicone rubber/nanosilica composites for high voltage direct current HVDC insulation

摘要

The present invention provides an alkyl disilazane or vinyl disilazane alone or sequentially on the surface of nanosilica in order to increase the dispersibility of the nanosilica in the liquid silicone rubber and chemically bond the liquid silicone rubber and the nanosilica to improve the interfacial properties. It relates to a silicone rubber/nano-silica composite for high-voltage direct current (HVDC) prepared by dispersing the surface-treated nano-silica in a liquid silicone rubber and a method of treatment. The silane compound surface treatment nanosilica synthesis method is performed by decomposing alkyl disilazane or vinyl disilazane alone or sequentially to have various alkyl group/vinyl group attachment ratios in an aqueous hydrochloric acid solution condition to obtain two alkyl silanols or vinyl silanols. After forming the nano-silica and reacting with nano-silica to prepare nano-silica to which an alkyl group and a vinyl group are attached alone, or to prepare nano-silica to which an alkyl group/vinyl group is attached in various ratios, excellent high-voltage direct current (HVDC) dielectric breakdown strength and mechanical properties It is possible to prepare a silicone rubber / nano-silica composite having