膜科学与技术

致孔剂对氧化石墨烯改性聚砜复合超滤膜结构和性能的影响

作者：李丽华，胡朝武，马明明，金文杰

单位：辽宁科技大学化工学院环境工程系，鞍山 114051

关键词：浸没沉淀相转化；氧化石墨烯改性聚砜超滤膜；致孔剂；分离性能；抗污染性能

出版年,卷(期):页码： 2016,36(1):39-44

摘要：

分别以聚乙烯吡咯烷酮（PVP-K30）、聚乙二醇（PEG-400）、十六烷基三甲基溴化铵（CTAB）和十二烷基硫酸钠（SDS）为致孔剂，采用浸没沉淀相转化方法制备了四种不同的PS/GO复合超滤膜，并通过扫描电镜表征、水通量和通量恢复率测试等手段，研究了致孔剂种类及用量对PS/GO复合超滤膜结构、分离性能和抗污染性能的影响作用。结果表明：四种致孔剂均可在不同程度上促进PS/GO复合膜孔结构的进一步发展，提高复合膜的水通量和通量恢复率，降低膜污染阻力。其中CTAB的影响作用最大，在截留率基本保持不变的前提下，可显著提高膜的水通量。当CTAB为2%时，膜污染阻力最小，膜抗污染性能显著增强。

Through immersion precipitation phase inversion method, four different kind of graphene oxide modified polysulfone (PS/GO) composite ultrafiltration membranes were prepared using polyvinylpyrrolidon (PVP-K10), polyethyleneglycol (PEG-400), cetyl trimethyl ammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) as porogens, respectively. The influence of the type and amount of porogens on the membrane structure, separation performance and antifouling performance was investigated by SEM, water flux and flux recovery rate. The results showed that the addition of four different kinds of porogens could all facilitate the further development of pore structures of GO modified ultrafiltration membranes, and thus increase the the water fluxes. Moreover, it was found that the addition of four different kinds of porogens could lead to the improvement of flux recovery rate and the decrease of fouling resistance. Among them, the promoting effect of CTAB for the water fluxes was highest compared with that of other porogen, while the retention rates remained unchanged. When the amount of CTAB was up to 2%, the fouling resistance was reduced to the lowest, and the antifouling performance was enhanced remarkably.

李丽华（1971-），女，辽宁鞍山人，博士，副教授，主要从事环境生物技术、环境电化学及环境功能材料的制备研究工作。通讯作者，电话：15998095872，E-mail:lilh2011@163.com

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