The effects of the composition ofthe casting solution and evaporation time on the morphology of the membranes were investigated by the use of scanning electron microscopy (SEM).
采用电子扫描显微镜（SEM）研完了铸膜液组成和挥发时间对膜形态结构的影响。
The effect of composition of copolymer, polymer content of casting solution, additives et al on the performance of membrane were discussed.
讨论了共聚物组成、制膜液中聚合物含量、添加剂等与膜平均孔径的关系；
The UF membrane with molecular weight cut off 67000 can be made by selecting proper composition of casting solution and preparation condition.
选择适当的膜液组成和制备条件，可以制得截留分子量为67000的超滤膜。
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