Preparation of asymmetric membranes using hot-filament chemical vapor deposition
    1.
    发明申请
    Preparation of asymmetric membranes using hot-filament chemical vapor deposition 审中-公开
    使用热丝化学气相沉积制备不对称膜

    公开(公告)号:US20060040053A1

    公开(公告)日:2006-02-23

    申请号:US10513880

    申请日:2003-05-09

    IPC分类号: C23C16/00

    摘要: One aspect of the present invention relates to a method for modifying one side of a PTFE membrane by using HFCVD to deposit a PTFE film on one side of the PTFE membrane. The precursor fluorocarbon gas is preferably hexafluoropropylene oxide, which upon pyrolysis under HFCVD conditions forms reactive CF2 species. The present invention also relates to a modified PTFE membrane having a PTFE film on only one side, wherein the PTFE film has a porosity of greater than about 30% and a dangling bond density of less than about 1018 spins/cm3. The invention further provides a method of filtering a liquid or gas or a mixture of the two, comprising passing the liquid or gas or mixture of the two through the modified PTFE membrane of the present invention.

    摘要翻译: 本发明的一个方面涉及通过使用HFCVD在PTFE膜的一侧上淀积PTFE膜来改变PTFE膜的一面的方法。 前体碳氟化合物气体优选为六氟环氧丙烷,其在HFCVD条件下热解形成反应性CF 2物质。 本发明还涉及仅在一侧具有PTFE膜的改性PTFE膜,其中PTFE膜的孔隙率大于约30%,悬挂键密度小于约1018自旋/ cm3。 本发明还提供一种过滤液体或气体或二者的混合物的方法,包括使液体或气体或其混合物通过本发明的改性PTFE膜。