A novel low-cost polyvinyl chloride (PVC) membrane was synthesized by phase inversion and fast and facile bio-inspired technique was used for substrate modification of a thin-film composite (TFC) forward osmosis (FO) membrane. Using DI water as feed solution (FS) and 1 M NaCl as draw solution (DS), water flux (WF) ranging from 4.15 to 15.95 LMH and reverse salt flux (RSF) ranging from 0.87 to 3.50 gMH were produced when the dope polymer solution concentration decreased from 17 to 10 wt%. Then, the substrate with 10 wt% PVC was selected for modification and the substrate was coated by dopamine (DA) solution for 1 and 3 h to enhance the membrane hydrophilicity and facilitate interfacial polymerization. Compared to the pristine membrane, the 1 h polydopamine (PDA) modified membrane displayed higher WF (18.90 LMH) and lower RSF (3.35 gMH). Whereas, for the longer coating time, WF decreased (9.70 LMH) due to the membrane surface pores blocking by the PDA layer. Finally, for understanding whether the experimental data can be supported by a theoretical model, the obtained experimental results were compared with a developed computational fluid dynamics (CFD) model and the results showed acceptable agreement with each other. The results of this work introduce a low-cost and facile approach for FO membrane fabrication by utilizing PVC polymer and PDA coating.

通过相转化合成了一种新型的低成本聚氯乙烯（PVC）膜，并利用快速简便的生物启发技术对薄膜复合材料（TFC）正向渗透（FO）膜进行了底物改性。当使用掺杂聚合物时，使用去离子水作为进料溶液（FS）和1 M氯化钠作为汲取溶液（DS），产生的水通量（WF）为4.15至15.95 LMH，反盐通量（RSF）为0.87至3.50 gMH。溶液浓度从17 wt％降低到10 wt％。然后，选择具有10 wt％PVC的基材进行改性，并用多巴胺（DA）溶液涂覆该基材1到3 h，以增强膜的亲水性并促进界面聚合。与原始膜相比，1 h聚多巴胺（PDA）改性的膜显示出较高的WF（18.90 LMH）和较低的RSF（3.35 gMH）。鉴于，对于更长的涂覆时间，由于膜表面孔被PDA层阻塞，导致WF降低（9.70 LMH）。最后，为了了解实验数据是否可以由理论模型支持，将获得的实验结果与已开发的计算流体动力学（CFD）模型进行了比较，结果表明彼此可以接受。这项工作的结果为通过使用PVC聚合物和PDA涂层制造FO膜提供了一种低成本且简便的方法。将获得的实验结果与开发的计算流体动力学（CFD）模型进行比较，结果表明彼此之间可以接受。这项工作的结果介绍了一种利用PVC聚合物和PDA涂层制造FO膜的低成本简便方法。将获得的实验结果与开发的计算流体动力学（CFD）模型进行比较，结果表明彼此之间可以接受。这项工作的结果为通过使用PVC聚合物和PDA涂层制造FO膜提供了一种低成本且简便的方法。