本文以相转化法制备了聚醚砜(PES)/磺化聚砜(SPSF)共混新型纳滤膜，并考察了磺化聚砜磺化度以及聚醚砜/磺化聚砜共混比对低分子量PEG的截留率和脱盐性能的影响。结果表明，在SPSF磺化度为10%，PES/SPSF共混比例为1.5的条件下,操作压力为0.5MPa，料液温度为25℃，对PEG1000截留率达99.8%，纳滤膜对PEG800截留率达81%，对PEG600截留率达57.8%，对硫酸钠的截留率为69%,对氯化钠的截留率为23.5%，其通量为90.3L/（m2h）。

 Polyethersulfone(PES)/Sulfonated polysulfone(SPSF) blend nanofiltration membranes were prepared using a simple phase inversion technique. The permeability of nanofiltration membranes fabricated with different sulfonation degree SPSF and SPSF contents was systematically studied. The results showed that nanofiltration membranes with PES/10% sulfonation degree SPSF ratio of 1.5 had high rejection of Na2SO4 (69%), NaCl(23.5%)，PEG1000(99.8%), PEG800(81%)  and，PEG600（57.8%） large pure water flux(90.3L/(m2h)) at 0.5MPa and 25℃.

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