发明申请
- 专利标题： Preparation of asymmetric membranes using hot-filament chemical vapor deposition
- 专利标题（中）： 使用热丝化学气相沉积制备不对称膜
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申请号： US10513880申请日： 2003-05-09
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公开(公告)号： US20060040053A1公开(公告)日： 2006-02-23
- 发明人: Karen Gleason , Richard Salimaro
- 申请人： Karen Gleason , Richard Salimaro
- 申请人地址： US MA Cambridge 02142
- 专利权人： Massachusetts Institution of Technology
- 当前专利权人： Massachusetts Institution of Technology
- 当前专利权人地址： US MA Cambridge 02142
- 国际申请： PCT/US03/14414 WO 20030509
- 主分类号： C23C16/00
- 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.
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