Abstract A novel thin-film nanocomposite (TFN) forward osmosis (FO) membrane was fabricated by loading bovine serum albumin (BSA)/gold nanoparticles (GNPs) on the surface of a cockscomb-like nylon supporting membrane. The influence of the embedded BSA/GNPs on surface morphology, surface roughness, surface charge, separation, and FO performance of the TFN-FO membrane was investigated. The water flux of the BSA/GNPs-modified FO membrane could be increased to 55.2 ± 5.4 LMH, and the Js/Jw value was substantially decreased to 0.034 g/L, indicating a high selectivity of the modified membrane. BSA/GNPs located between the top of the nylon supporting membrane and the bottom of the polyamide (PA) skin layer provided passage for water transport and increased the roughness of the PA layer, thus enhancing the effective area on which the osmotic pressure could act. In addition, BSA/GNPs located at the bottom surface of the nylon supporting membrane provided a nearly electroneutral surface in the solution and alleviated dilutive concentration polarization. In summary, choosing a nylon membrane with a special cockscomb-like surface structure as the supporting layer to load BSA/GNPs nanoparticles proved to be a creative and effective nano-modification method for fabricating high-performance TFN-FO membranes.

中文翻译：

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具有高性能分散牛血清白蛋白 (BSA)/金纳米粒子 (GNP) 界面层的新型鸡冠状基底支撑 TFN-FO 膜

摘要 通过在鸡冠状尼龙支撑膜表面负载牛血清白蛋白（BSA）/金纳米粒子（GNP），制备了一种新型薄膜纳米复合材料（TFN）正渗透（FO）膜。研究了嵌入的 BSA/GNPs 对 TFN-FO 膜的表面形态、表面粗糙度、表面电荷、分离和 FO 性能的影响。BSA/GNPs改性FO膜的水通量可提高至55.2±5.4 LMH，Js/Jw值大幅降低至0.034 g/L，表明改性膜具有较高的选择性。位于尼龙支撑膜顶部和聚酰胺 (PA) 表层底部之间的 BSA/GNP 为水传输提供了通道并增加了 PA 层的粗糙度，从而增加渗透压作用的有效面积。此外，位于尼龙支撑膜底面的 BSA/GNPs 在溶液中提供了一个近乎电中性的表面，并减轻了稀释浓度极化。总之，选择具有特殊鸡冠状表面结构的尼龙膜作为承载 BSA/GNPs 纳米粒子的支撑层被证明是一种创造性且有效的纳米改性方法，可用于制造高性能 TFN-FO 膜。