Silica membranes and process of production thereof
    5.
    发明授权
    Silica membranes and process of production thereof 失效
    二氧化硅膜及其生产方法

    公开(公告)号:US06943123B2

    公开(公告)日:2005-09-13

    申请号:US10297561

    申请日:2001-06-12

    摘要: A method of producing a weakly branched silica membranes coated onto a substrate using a two-step catalysed hydrolysis sol-gel process. A tetraethylorthosilicate (TEOS)/ethanol solution is formed and placed in an ice bath. An acid/water solution is formed and added to the TEOS/ethanol solution, to form a TEOS/ethanol/acid/water solution, which inturn is refluxed. A two-step sol is prepared by adding water and nitric acid to the refluxed TEOS/ethanol/acid/water solution and initiating a two-step sol-gel process. From the two-step sol a membrane film layer is deposited on a substrate, for use in a number of applications, including selective separation of gases.

    摘要翻译: 使用两步催化的水解溶胶 - 凝胶法制备涂覆在基材上的弱支化二氧化硅膜的方法。 形成原硅酸四乙酯(TEOS)/乙醇溶液并置于冰浴中。 形成酸/水溶液并加入到TEOS /乙醇溶液中,形成回流的TEOS /乙醇/酸/水溶液。 通过向回流的TEOS /乙醇/酸/水溶液中加入水和硝酸并引发两步溶胶 - 凝胶法制备两步溶胶。 从两步溶胶中,将膜膜层沉积在基底上,用于许多应用,包括选择性分离气体。