【摘要】 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.更多还原

【Abstract】 Sulfonated copoly(phthalazinone biphenyl ether sulfone)(SPPBES)has high thermal stability and chlorine resistance.A series of thin composite nanofiltration membranes (SPPBES-1,SPPBES-2, SPPBES-3)were prepared by coating sulfonated copoly(phthalazinone biphenyl ether sulfone)on poly (phthalazinone ether sulfone ketone)ultrafiltration support membranes.In this work,the chlorine resistance of SPPBES composite nanofiltration membranes was discussed.The effects of chlorine exposure time,chlorine concentration and pH of NaClO on the performance of composite membranes were investigated.The rejection to the NaCl increased with the increase of chlorine concentration.These membranes displayed the long-term stability for 30days under chlorine mass fraction of NaClO 300×10-6. SPPBES composite membrane showed a good stability in sodium hypochlorite at pH 4～12.更多还原