膜科学与技术

聚醚砜/磺化聚砜共混纳滤膜的制备及性能研究

作者：钟金成¹，²，何颖²，秦舒浩¹，³，陈卓²，张凯舟¹，³，姚勇¹，³，张敏敏¹，³?

单位： 1.贵州省材料技术创新基地，贵州，贵阳 220014；2.贵州师范大学化学与材料科学学院，贵州贵阳 550001；3.国家复合改性聚合物材料工程技术研究中心，贵州贵阳 550014

关键词：聚醚砜，磺化聚砜，纳滤，蒸发，脱盐率

出版年,卷(期):页码： 2016,36(2):1-6

摘要：

采用相转化法结合溶剂蒸发沉淀工艺制备新型聚醚砜（PES）/磺化聚砜(SPSF)共混纳滤膜，并分别研究了PES/SPSF共混比、乙醇质量分数、烘箱内蒸发温度与时间对膜的脱盐率及产水量的影响。结果表明：磺化聚砜的增加，可以提高膜的致密性，从而提高膜的脱盐率。添加乙醇与二甲基乙酰胺（DMAc）作为混合溶剂，当乙醇质量分数为15%，蒸发时烘箱内温度为70℃，蒸发时间为3min时，对2g/L的Na2S04盐溶液脱盐率为57%，产水量为16 L/(m2•h)。当保持其它工艺参数不变的情况下，只提高蒸发温度为100℃时，纳滤膜对2g/L的Na2S04盐溶液脱盐率为65%.

Polyethersulfone(PES)/Sulfonatedpolysulfone(SPSF) blend nanofiltration membranes were prepared using phase inversion technique combined with solvent evaporation process. The influence ofpolyether sulfone/Sulfonatedpolysulfone blended mass ratio,mass fraction of ethanol and evaporation temperature and time in ovenon desalination rate and water yield of membrane were studied respectively. The results demonstrated thatincrease of the content of sulfonatedpolysulfone could improve the density of membrane,which contributed to the increase of desalination rate. By adding ethanol and DMAc as solvent systemsinto the blending system, the membraneresulted in the rejection of 2g/L Na2S04(57%) solution and water yield((16 L/(m2•h)) , with 15% ethanol(w/w), evaporation inside the oven temperature(70℃) and the evaporating time (3 min). When evaporating temperature was increased to 100℃ with other process conditions remain unchanged,the rejection of 2g/L Na2S04solution enhanced to 65%.

第一作者简介：钟金成(1988-)，男，贵州省贵阳市人，硕士研究生，主要从事环境化学及水处理技术方面的研究.

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