Abstract New-style thin film composite nanofiltration (TFC NF) membrane with a stripe-like surface structure, superior interfacial bonding, expected permeability and antifouling performance was successfully fabricated via interfacial polymerization. The aminated polyvinyl chloride (APVC) membrane prepared by amination reaction of polyvinyl chloride (PVC) with triethylenetetramine (TETA) was used as the support layer. The new graphene oxide-polyamide (GO-PA) selective layer was formed by adding graphene oxide (GO) to the aqueous solution to participate in the interfacial polymerization process. The effects of amination modification of PVC substrate membrane and addition of GO during the interfacial polymerization on the structure and performances of the TFC NF membranes were studied. The results indicated that both of the amine group on the surface of the APVC membrane and GO participated in the interfacial polymerization, which endowed the GO-PA/APVC membrane with a new-style stripe-like surface structure and a thicker, gradually looser cross-sectional structure. Meanwhile, the effective desalination active layer of the GO-PA/APVC membrane was much thinner than that of the PA/APVC membrane. The special structure was beneficial to accelerate the speed of water transmission and effectively overcome the trade-off effect during the desalination process. Therefore, the water permeability of GO-PA/APVC membrane was improved more than 60% while the salt rejection remained stable compared with PA/APVC membrane. Moreover, the GO-PA/APVC membrane exhibited superior interfacial bonding and antifouling properties.

中文翻译：

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一种新型条纹状结构的界面增强型GO-PA/APVC纳滤膜的设计

摘要 通过界面聚合成功地制备了具有条纹状表面结构、优异的界面结合、预期的渗透性和防污性能的新型薄膜复合纳滤（TFC NF）膜。采用聚氯乙烯(PVC)与三亚乙基四胺(TETA)胺化反应制备的胺化聚氯乙烯(APVC)膜作为支撑层。通过在水溶液中加入氧化石墨烯（GO）参与界面聚合过程，形成新的氧化石墨烯-聚酰胺（GO-PA）选择性层。研究了界面聚合过程中PVC基材膜的胺化改性和GO的添加对TFC NF膜结构和性能的影响。结果表明，APVC 膜表面的胺基和 GO 均参与了界面聚合，使 GO-PA/APVC 膜具有新型条纹状表面结构和较厚、逐渐松散的交叉结构。 -截面结构。同时，GO-PA/APVC膜的有效脱盐活性层比PA/APVC膜薄得多。特殊的结构有利于加快输水速度，有效克服海水淡化过程中的权衡效应。因此，与PA/APVC膜相比，GO-PA/APVC膜的透水性提高了60%以上，而脱盐率保持稳定。此外，GO-PA/APVC 膜表现出优异的界面结合和防污性能。