论文部分内容阅读
以氯化-1-烯丙基-3-乙烯基咪唑离子液体为反应单体,偶氮二异丁腈(AIBN)为引发剂,通过自由基聚合先合成聚离子液体预聚物,并将其与聚偏氟乙烯(PVDF)、聚乙二醇(PEG)进一步共混反应,以制备聚离子液体/PVDF共混铸膜液.然后将该铸膜液在聚丙烯(PP)微孔膜表面进行涂覆成膜,以制备具有互穿网络结构的聚离子液体/PVDF荷电复合膜.采用红外光谱、扫描电镜、Zeta电位计等对复合膜表面的化学结构、形貌及荷电性能等进行分析,并采用水通量测定仪对复合膜的纯水通量及蛋白质和染料的分离性能等进行了研究.结果表明,该复合膜表面具有较好的荷电性能,且随聚离子液体的加入可以有效提高膜的亲水性和抗污染性,复合膜M2的纯水通量可达到101.7 L·m-2·h-1,该膜对溶菌酶和染料罗丹明6G的截留率分别为88.0%和94.1%,该分离膜经清水反冲洗后通量恢复率分别达到72.5%和91.8%.
Using 1-allyl-3-vinylimidazolium chloride ionic liquid as the reactive monomer and azobisisobutyronitrile (AIBN) as the initiator, the polyionic liquid prepolymer was synthesized by free radical polymerization, It was further blended with polyvinylidene fluoride (PVDF) and polyethylene glycol (PEG) to prepare a polyionic liquid / PVDF co-casting solution, which was then coated on a polypropylene (PP) The surface of the composite membrane was coated to prepare a polyion liquid / PVDF composite membrane with an interpenetrating network structure.The chemical structure, morphology and chargeability of the composite membrane surface were investigated by infrared spectroscopy, scanning electron microscopy and Zeta potentiometer , Etc. The pure water flux of the composite membrane and the separation performance of proteins and dyes were also studied by water flux analyzer.The results showed that the surface of the composite membrane has good charge performance and with the polycation The addition of liquid can effectively improve the hydrophilic and anti-fouling properties of the membrane. The pure water flux of the composite membrane M2 can reach 101.7 L · m-2 · h-1, and the rejection of lysozyme and rhodamine 6G 88.0% and 94.1% respectively. The flux recovery rate of this separation membrane reached 72.5% and 91.8% respectively after the water was backwash.