Different PPSU nanofiltration (NF) fibers were used for the first time as a potential fiber for saline water desalination by forward osmosis (FO). The characteristics of fibers, such as their surface structure, cross-sectional structure, and thickness were measured using a SEM and an AFM, with fiber porosity also measured. The effects of the PPSU amount and operating conditions on the performance of water transport were investigated. The structural parameter (S = 467–601) displayed small values for three PPSU fibers due to their high porosity and because the fiber was less thick, which corresponded well to their performance. The prepared PPSU fiber tested under the FO process displayed high water fluxes utilizing 3.0 M NaCl as the draw solution. High salt rejection for all PPSU FO fibers was obtained, and the salt reverse fluxes were preserved below 7.30, 6.58, and 3.89 gMH for PPSU 25, 29, and 30 wt.%, respectively. Increasing the PPSU amounts led to decreasing the specific reverse salt flux. The PPSU NF hollow fibers prepared in this work are eligible FO membranes for water desalination.

首次使用不同的PPSU纳滤（NF）纤维作为通过正向渗透（FO）进行盐水脱盐的潜在纤维。使用SEM和AFM测量纤维的特性，例如其表面结构，横截面结构和厚度，并且还测量纤维孔隙率。研究了PPSU量和操作条件对水传输性能的影响。三根PPSU纤维的结构参数（S = 467–601）由于孔隙率高且纤维的厚度较小，因此显示出较小的值，这与它们的性能非常吻合。在FO工艺下测试的制备PPSU纤维利用3.0 M NaCl作为拉伸溶液显示出高水通量。所有PPSU FO纤维均具有较高的脱盐率，对于PPSU 25、29和30 wt。％，盐反向通量分别保持在7.30、6.58和3.89 gMH以下。PPSU量的增加导致比反盐通量的降低。在这项工作中制备的PPSU NF中空纤维是合格的FO膜，可用于水脱盐。