摘要
以国产聚偏氟乙烯(PVDF)为原料,选择不同种类的单一溶剂、混合溶剂和添加剂为铸膜液组成,研究了若干制膜因素对膜性能的影响,采用混合溶剂DMAC/AC之比控制AC含量在40%─60%,添加剂含量在10%─20%,制膜的气氛温度为25—30C,铸膜液温度为50℃左右,可制得截留分子量为15万和24万,透水速度达30—70ml/(cm2·h),截留率为90%以上的大孔超滤膜。
A study on the preparation of large pore size ultrafiltration membrane of PVDF was reported in this paper. The effect of main parameters,such as solvents,additives and temperature, on the membrane properties was discussed. The membranes with a weight cut--off of 240000 and 150000 were prefared.The flux of 30--70 ml/(cm2.h) and the rejection rate above 90% can be achieved.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1995年第1期52-53,共2页
Environmental Science
基金
国家"七五"科技攻关项目
关键词
聚偏氟乙烯
大孔径超滤膜
超滤
膜分离
polyvinylidene fluoride
large pore xize
ultrafiltration membrane.