Commercial nanofiltration polyethersulfone (NF2) membrane was modified via ultraviolet (UV) photografting to prepare a high-performance forward osmosis (FO) membrane. The optimized condition of grafting parameters was obtained using central composite design (CCD) and response surface methodology (RSM). UV-photografting time and acrylic acid (AA) monomer concentration were the considered variables, while the two RSM responses were water permeate flux and reverse salt diffusion flux (RSD). Quadratic models were established between the responses and the independent parameters using analysis of variance (ANOVA). The membranes were characterized with functional group, morphology and surface roughness. The obtained optimum conditions were 2.81 min grafting time and 27.85 g/L AA monomer concentration. Under these conditions, a maximum water permeate flux of 1.52±0.04 L/m²·h was achieved with an RSD value of 10.09±0.36 g/m²·h. The optimized membrane exhibited a higher water flux compared to the unmodified NF2 membrane without any significant change of the RSD value.

商用纳滤聚醚砜 (NF2) 膜通过紫外线 (UV) 光接枝改性制备高性能正向渗透 (FO) 膜。使用中心复合设计(CCD)和响应面方法(RSM)获得接枝参数的优化条件。UV-photografting 时间和丙烯酸 (AA) 单体浓度是考虑的变量，而两个 RSM 响应是水渗透通量和反向盐扩散通量 (RSD)。使用方差分析 (ANOVA) 在响应和独立参数之间建立二次模型。膜的特征在于官能团、形态和表面粗糙度。获得的最佳条件是接枝时间为 2.81 分钟，AA 单体浓度为 27.85 g/L。在这些条件下，² ·h 的 RSD 值为 10.09±0.36 g/m ² ·h。与未改性的 NF2 膜相比，优化的膜表现出更高的水通量，而 RSD 值没有任何显着变化。