Thin-film composite (TFC) reverse osmosis (RO) membranes whose ultrathin selective layer is composed of polyamide (PA) have been extensively employed in desalination and purification of water. However, the poor permeability, selectivity, and antifouling properties have limited their application, thus provoked several studies. In this work, a semi-interpenetrating polymer network (semi-IPN) based on PA and poly (N-vinyl-2-pyrrolidone) (PVP) was fabricated via in situ polymerization to enhance the permselectivity and antifouling property of RO membrane. The successfully fabricated PA/PVP semi-IPN was characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction, and Brunner-Emmet-Teller (BET) measurements. Atomic force microscopy measurement showed that the hydrophilicity of the membrane was substantially improved. The optimal resultant membrane (0.5–10s-NVP) showed 43.2% and 0.2% increments in water flux and salt rejection, respectively. The antifouling performance was substantially improved; the 0.5–10s-NVP exhibited a lower decline ratio in the normalized water flux after the Bovine serum albumin (BSA) fouling process. Furthermore, the good stability of the semi-IPN was revealed by XPS after a 7-d continuous crossflow test. This work provides a guideline for physicochemical properties and microstructural design of novel RO membranes.

超薄选择层由聚酰胺（PA）组成的薄膜复合（TFC）反渗透（RO）膜已广泛用于水的脱盐和净化。然而，差的渗透性，选择性和防污性能限制了它们的应用，因此引发了一些研究。在这项工作中，通过原位聚合制备了基于PA和聚（N-乙烯基-2-吡咯烷酮）（PVP）的半互穿聚合物网络（semi-IPN），以增强RO膜的渗透选择性和防污性能。通过X射线光电子能谱（XPS），X射线衍射和Brunner-Emmet-Teller（BET）测量来表征成功制造的PA / PVP半IPN。原子力显微镜测量显示膜的亲水性得到显着改善。最佳的合成膜（0.5-10s-NVP）分别显示出水通量和脱盐率分别增加43.2％和0.2％。防污性能大大提高；在牛血清白蛋白（BSA）结垢过程中，0.5-10s-NVP在归一化水通量中的下降率较低。此外，经过7天连续错流测试后，XPS显示了半IPN的良好稳定性。这项工作为新型反渗透膜的理化性质和微观结构设计提供了指导。在连续7天的连续错流测试后，XPS显示了半IPN的良好稳定性。这项工作为新型反渗透膜的理化性质和微观结构设计提供了指导。在连续7天的连续错流测试后，XPS显示了半IPN的良好稳定性。这项工作为新型反渗透膜的理化性质和微观结构设计提供了指导。