A polyamide/poly(vinylidene fluoride) composite hollow fiber membrane (HFM) was designed by in situ interfacial polymerization (IP) during the fiber spinning process. Using a piperazine aqueous solution as the bore fluid and a dual-bath coagulation, the PA outer layer was formed via IP of the PIP in the bore fluid and TMC in the second reactive bath during phase inversion process. Chemical structure, membrane morphology and surface property were characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM), and zeta potential. The effects of several parameters involved in the membrane fabrication (e.g., piperazine concentration, bore fluid flow rate, residence time and heat treatment temperature) on the morphology and performance of resultant composite HFMs were investigated. The composite HFM showed a performance that is comparable favorably with conventional nanofiltration membranes in terms of showed water permeability (10.2 L/m²·h·bar), high rejection to dyes (i.e., 100% for CR and EBT, 99.99% for RhB and MB, 98.3% for MO) and low salt rejections (NaCl 6.2%). Moreover, the newly developed composite HFM showed good stability and flux recovery with simple water rinsing for treatment of simulated textile wastewater. This work is expected to provide a new approach to designing composite HFMs for the treatment and reuse of textile wastewater.

通过纤维纺丝过程中的原位界面聚合（IP）设计了聚酰胺/聚偏氟乙烯复合中空纤维膜（HFM）。在相转化过程中，使用哌嗪水溶液作为钻孔液并进行双浴凝固，通过钻孔液中PIP的IP和第二反应槽中的TMC的IP形成PA外层。化学结构，膜形态和表面性质通过傅里叶变换红外光谱（FTIR），X射线光电子能谱仪（XPS），扫描电子显微镜（SEM）和Zeta电位进行表征。膜制造过程中涉及的几个参数的影响（例如，哌嗪浓度，孔流体流速，停留时间和热处理温度）对所得复合HFM的形貌和性能进行了研究。复合材料的HFM表现出的水渗透率（10.2 L / m）可与传统的纳滤膜媲美² ·h·bar），对染料的高截留率（即CR和EBT为100％，RhB和MB为99.99％，MO为98.3％）和低盐截留率（NaCl 6.2％）。此外，新开发的复合HFM具有良好的稳定性和通量恢复性，并且通过简单的水冲洗即可处理模拟的纺织废水。预期这项工作将为设计用于处理和再利用纺织废水的复合HFM提供一种新方法。