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以耐高温和耐氧化性能较好的磺化杂萘联苯共聚醚砜(SPPBES)为涂层材料制备了3种复合纳滤.通过考察次氯酸钠浓度、浸泡时间、次氯酸钠溶液pH对复合纳滤膜分离性能的影响,详细研究复合纳滤膜的耐氯性能.实验结果表明,随着次氯酸钠浓度的提高,复合膜的脱盐率逐渐降低;3种复合膜在质量分数300×10-6次氯酸钠溶液浸泡30天,膜性能没有显现变化,表现出良好的耐氯性能;与在次氯酸钠溶液(pH为4、12)浸泡的复合膜相比,在次氯酸钠(pH7)溶液中浸泡的复合膜性能变化较小,SPPBES复合膜在pH为4~12范围内具有很好的耐氯性能.

参考文献

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