Thin film composite (TFC) technology has been widely used to prepare reverse osmosis (RO) membrane, in which the relationship between support layer and selective layer plays a significant role. To thoroughly clarify the influence of support layer pore size on the properties of selective layer, herein, we prepared a series of polysulfone (PSf) support layers with different surface pore sizes by adjusting casting solution concentrations. Afterward, polyamide (PA) selective layers were prepared on top of PSf support layers via interfacial polymerization method. Detailed studies were performed to illustrate membrane-forming dynamics, TFC morphologies and membrane performances. The pore size of support layer has a substantial effect on the aqueous monomer diffusion behavior as well as selective layer morphologies and overall performances; specifically, resulting in differences in both thickness and roughness of PA layer and also inducing different membrane performances. Combined with anti-backflush experiments, we also provide an insight view into the interfacial adhesion between support layer and selective layer.

薄膜复合（TFC）技术已广泛用于制备反渗透（RO）膜，其中支撑层和选择性层之间的关系起着重要作用。为了彻底阐明支撑层孔径对选择性层性能的影响，本文通过调节浇铸溶液浓度制备了一系列具有不同表面孔径的聚砜（PSf）支撑层。然后，通过界面聚合方法在 PSf 支撑层的顶部制备聚酰胺 (PA) 选择性层。进行了详细的研究以说明成膜动力学、TFC 形态和膜性能。支撑层的孔径对水性单体的扩散行为以及选择性层的形态和整体性能有很大影响；具体来说，导致 PA 层厚度和粗糙度的差异，并导致不同的膜性能。结合抗反吹实验，我们还提供了对支撑层和选择性层之间界面粘附力的深入了解。