亲水防污薄膜纳米复合正渗透膜：两性离子功能化碳纳米纤维改性的效果,Industrial & Engineering Chemistry Research

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亲水防污薄膜纳米复合正渗透膜：两性离子功能化碳纳米纤维改性的效果
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-12-30 , DOI: 10.1021/acs.iecr.3c03579
Mehrasa Yassaria ₁ , Alireza Shakeria ₁ , Pooria Karami ₂ , Mohtada Sadrzadeh ₂

Affiliation

聚酰胺（PA）活性层在薄膜复合（TFC）膜的渗透和防污性能中起着关键作用。在这项研究中，我们合成了一种基于天然的两性离子薄膜纳米复合材料（TFN）膜，具有改善的有机污染抵抗能力。将亲水性两性离子聚（磺基甜菜碱甲基丙烯酸酯）（PSBMA）通过化学方法引入到纤维素纳米纤维（CNF）的表面，形成CNF- g -PSBMA，随后将其掺入PA选择性层中。合成的 TFC 膜的横截面透射电子显微镜图像和 3D 原子力显微镜表面形貌表明，CNF- g -PSBMA 导致形成更薄、更光滑的 PA 层。在两种 FO 和压力延迟渗透 (PRO) 模式下的正向渗透 (FO) 过滤装置中研究了膜的性能。FO 和 PRO 模式下的水通量分别增加了 16.3 和 38 LMH，反向盐通量与原始膜相似。与未改性的 TFC 相比，改性的 TFN 膜由于其改善的亲水性和更光滑的表面，对海藻酸钠和牛血清白蛋白污染物的防污性能增强了四倍。由于加入了基于天然的绿色材料，CNF- g -PSBMA 修饰的 TFN 在 FO 过滤中显示出巨大的应用潜力，显着增强了膜的性能。

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Hydrophilic Antifouling Thin-Film Nanocomposite Forward Osmosis Membranes: Effect of Zwitterion-Functionalized Carbon Nanofiber Modification

The polyamide (PA) active layer plays a key role in the permeation and antifouling properties of thin-film composite (TFC) membranes. In this study, we synthesized a nature-based zwitterionic thin-film nanocomposite (TFN) membrane with improved organic fouling resistance. Hydrophilic zwitterionic poly(sulfobetaine methacrylate) (PSBMA) was chemically introduced onto the surface of cellulose nanofibers (CNFs) to form CNF-g-PSBMA, which was subsequently incorporated into the PA selective layer. The cross-sectional transmission electron microscopy images and 3D atomic force microscopy surface topographies of synthesized TFC membranes showed that CNF-g-PSBMA led to the formation of a thinner and smoother PA layer. The performance of membranes was investigated in a forward osmosis (FO) filtration setup in two FO and pressure-retarded osmosis (PRO) modes. The water flux in FO and PRO modes showed an increase of 16.3 and 38 LMH, respectively, with a reverse salt flux similar to that of the pristine membrane. The modified TFN membranes revealed enhanced antifouling properties against sodium alginate and bovine serum albumin foulants up to four times compared with the unmodified TFC because of their improved hydrophilicity and smoother surface. The CNF-g-PSBMA-modified TFNs demonstrated great potential for use in FO filtration, thanks to the incorporation of nature-based green materials, which significantly enhanced the membrane performance.

更新日期：2023-12-30

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