Abstract In this work, a salt-responsive thin film composite (TFC) forward osmosis (FO) membrane has been prepared by grafting poly(sulfobetaine methacrylate) (PSBMA) brushes on a commercial FO membrane surface via an ATRP reaction for advanced treatment of oil/water emulsions. By varying polymerization time, the optimum modified membrane (i.e. TFC-PSBMA) was obtained, which exhibited superhydrophilic and ultralow oil-adhesion properties. Dynamic fouling experiments using a feed solution of 10,000 ppm oil/water emulsion demonstrated the superior anti-fouling ability of the TFC-PSBMA membrane, as displayed by the lower water flux decline compared to the TFC-control membrane. Furthermore, multi-cycle FO fouling tests showed that the irreversible membrane fouling of the TFC-PSBMA membrane can be significantly alleviated by using salt cleaning in long-term use. The salt-responsive properties of the PSBMA brushes were considered to provide a driving force for the release of oil foulants from the membrane surface.

中文翻译：

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用两性离子聚合物对 TFC FO 膜进行表面功能化：提高防污和盐响应清洁性能

摘要 在这项工作中，通过 ATRP 反应将聚（磺基甜菜碱甲基丙烯酸酯）（PSBMA）刷接枝到商业 FO 膜表面，制备了盐响应薄膜复合（TFC）正渗透（FO）膜，用于石油的深度处理。 /水乳液。通过改变聚合时间，得到了最佳的改性膜（即TFC-PSBMA），该膜具有超亲水性和超低油粘附性。使用 10,000 ppm 油/水乳液进料溶液的动态污染实验证明了 TFC-PSBMA 膜具有优异的抗污染能力，与 TFC 控制膜相比，水通量下降较低。此外，多循环 FO 污染测试表明，TFC-PSBMA 膜的不可逆膜污染在长期使用中可以通过盐清洗得到显着缓解。PSBMA 刷子的盐响应特性被认为是从膜表面释放油污的驱动力。