| 摘要 |
PURPOSE:To prepare a hydrogen separated membrane carrying an increased penetration volume by forming closely a uniform membrane of porous gel porous glass constituted with hydrolytic substance of metallic alcoxide on the surface of a porous substrate. CONSTITUTION:A hydrolytic catalyst is added and mixed with an aqueous solution of metallic alcoxide such as silicon tetraethoxide, triethoxyaluminum, tetrapropoxytitanium and the like. Said mixture sol is coated on a porous substrate left in a normal temperature -80 deg.C for 1-10min to form up a wet gel molded material. Then, said molded material is dipped in a nonaqueous solvent, heated, dry treated and dehydrated to form up a dry gel. As nonaqueous solvent, it is not actually mixed with water and a liquid carrying a boiling point of more than 200 deg.C and inactive to wet gel. Dehydration treatment is carried out in a temperature of less than 200 deg.C for approximately 24hr.
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