Preparation of felt-metal supported modified polyvinyl alcohol composite hydrophilic ultrafiltration membrane①
来源期刊：中南大学学报(英文版)2005年第4期
论文作者：邱运仁 张启修 王帅
文章页码：448 - 452
Key words：polyvinyl alcohol; composite membrane; hydrophilicity; ultrafiltration; modification
Abstract: A novel technology of preparation of felt-metal supported modified polyvinyl alcohol(PVA) ultrafiltration(UF) membrane was invented, which could avoid the blockage of the holes of support layer and the leakage of the casting solution through the holes of support layer. Felt-metal supported ferric sulfate modified PVA composite UF membranes were prepared by the innovative technology. The results show that the composite membranes are used to treat 1 000 mg/L oil/water emulsion at trans-membrane pressure from 0.25 to 0.45 MPa, the permeate flux is from 36 to 52 L/(m2·h), and the retention of chemical oxygen demand(COD) is over 92%. The composite membrane resistance increases with the increase of trans-membrane pressure.
