Fumed silica (commonly known as fumed white carbon black) prepared by high-temperature hydrolysis of chlorosilane in a hydrogen-oxygen flame is a white, non-toxic, odorless, and amorphous inorganic fine chemical product. The primary particle size of fumed silica is 7-40 nanometers, and the specific surface area is between 70-400m2/g. Divided into hydrophilicity and hydrophobicity, hydrophobic fumed silica uses organic matter to react with the silanol on the surface of hydrophilic fumed silica to connect organic groups to the surface of hydrophilic fumed silica in the form of chemical bonds. Make fumed silica exhibit permanent hydrophobic properties.
D2408222
