一种含有高分子液晶超滤膜的制备与性能

The preparation and properties of UF membrane including a kind of liquid crystalline polymers

将自制的一种主链聚酯型高分子液晶添加到聚砜铸膜液中 ,在温度为 80℃下 ,制成了对牛血清白蛋白截留率大于 90 %的超滤膜 .研究了高分子液晶的添加对所制超滤膜性能的影响 ,结果表明 ,在相同实验条件下 ,含高分子液晶超滤膜的截留率相对于不含高分子液晶的超滤膜有较大提高 ,从 60 %～ 70 %提高到 90 %以上 .考察了相关制膜参数如溶剂、高分子液晶浓度、添加剂种类、用量、聚砜的浓度、铸膜气氛温度、蒸发时间等对含高分子液晶超滤膜性能的影响 .

A kind of polysulfone(PS) ultrafiltration(UF) membrane containing main-chain LCP made in our laboratory was prepared at high temperature (80?℃), whose retention to BSA is more than 90%. The results show that the retention of LCP/PS UF membrane increases greatly from 60%～70% to 90%or more, in comparison with the membrane without LCP under the same condition. A series of conditions of preparation, e.g. solvent, the contents of LCP and PS in casting solution, addictive, evaporation temperature and time, which maybe affect the properties of LCP/PS UF membrane, were studied.