A METHOD FOR PREPARATION OF SURFACE MODIFIED SILICA AND A SURFACE MODIFIED SILICA PREPARED BY THE SAME

摘要

The present invention relates to a manufacturing method of surface-modified silica and the surface-modified silica manufactured thereby. The manufacturing method comprises the steps of: (a) passing colloid silica through a positive ion exchange resin, and removing a metallic ion; (b) adding an acid or base catalyst in the colloid silica from which the metallic ion is removed, and controlling an acidity between PH 2 and 3; and (c) adding a silane coupling agent and an alcohol compound, and modifying the surface of the silica.