The development of commercial-scale thin-film composite (TFC) hollow fiber membranes and modules for reverse osmosis (RO) has been lagging behind spiral wound TFC flat-sheet membranes and modules for many years. The delay arises from the challenges of synthesizing a defect-free polyamide selective layer on hollow fibers in modules. In order to solve this problem, a novel interfacial polymerization method is presented in this work to fabricate 1-inch TFC hollow fiber membrane modules for RO applications. By circulating the m-phenylenediamine (MPD) solution on the lumen side under a positive pressure and circulating the trimesoyl chloride (TMC) solution at the atmosphere pressure, a strong, uniform and defect-free polyamide selective layer is formed on the inner surface of hollow fiber membranes in modules. Under pressure, not only MPD monomers are evenly distributed on the inner surface of each hollow fiber substrate in modules, but also sufficient MPD monomers can retain in the substrate pores for further reaction with TMC monomers. The best RO performance obtained by this newly developed TFC hollow fiber membrane module has a water permeability of 4.49 L m⁻² h⁻¹ bar⁻¹ and a NaCl rejection of ~99%, using a feed solution of 1000 ppm NaCl under a transmembrane pressure of 20 bar. The novel interfacial polymerization method may provide useful insights to fabricate TFC hollow fiber membrane modules for desalination of brackish water.

多年来，商业规模的用于反渗透（RO）的薄膜复合（TFC）中空纤维膜和组件的开发一直落后于螺旋缠绕TFC平板膜和组件。延迟源于在模块中的中空纤维上合成无缺陷聚酰胺选择层的挑战。为了解决这个问题，在这项工作中提出了一种新颖的界面聚合方法来制造用于RO应用的1英寸TFC中空纤维膜组件。通过在正压下使内苯二胺（MPD）溶液在管腔侧循环，并在大气压下使偏苯三酰氯（TMC）溶液循环，可以在膜的内表面上形成坚固，均匀且无缺陷的聚酰胺选择层。模块中的中空纤维膜。在压力之下，MPD单体不仅均匀地分布在模块中每个中空纤维基材的内表面上，而且足够的MPD单体可以保留在基材孔中，以便与TMC单体进一步反应。通过这种新开发的TFC中空纤维膜组件获得的最佳RO性能具有4.49 L m的透水性^-2  h ^-1 bar ^-1，在1000 bar的跨膜压力下使用1000 ppm NaCl的进料溶液，NaCl的截留率约为99％。新颖的界面聚合方法可为制造用于微咸水脱盐的TFC中空纤维膜组件提供有用的见识。