| 摘要 |
PURPOSE:To make it possible to form a large-sized organic substance-containing silica bulk material in high yield in producing an organic substance-containing silica bulk material by sol-gel method, by using a specific treating process. CONSTITUTION:In producing an organic material-containing silica bulk material, at least one of the following processes a-f is included. Namely, (a) a process wherein an alkyl silicate is hydrolyzed by the use of an acidic catalyst, (b) a process wherein silica fine particles are dispersed into the hydrolyzed solution, (c) a process wherein the silica dispersion is adjusted to pH3-6, (d) a process wherein an organic substance is added to the dispersion and uniformly stirred, (e) a process wherein the prepared sol is gelatinized and dried to give dry gel and (f) a process wherein the dry gel is heated to give the silica bulk material. |
