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Preparation and characterization of novel forward osmosis membrane incorporated with sulfonated carbon nanotubes

机译：新型磺化碳纳米管正渗透膜的制备与表征

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In this study, carbon nanotubes (CNTs) were modified with sulfonated groups and incorporated into the active layer of a forward osmosis (FO) membrane to achieve a desirable thin-film nanocomposite (TFN) FO membrane. Different concentrations of sulfonated carbon nanotubes (SCNTs) were added, and their impact on the FO membrane was also investigated, including the hydrophilicity, roughness, membrane morphology and FO performance. With the addition of SCNTs, the membrane surface got smoother and denser, and the hydrophilicity also improved significantly. Regarding FO performance, SCNTs-functionalized FO membranes exhibited higher water flux ( J _(w) ) and lower reverse salt flux ( J _(s) ). The optimal J _(w) of 29.9 ± 1.6 LMH was achieved by using 1 M NaCl solution as the draw solution (DS) and deionized (DI) water as the feed solution (FS), almost 140% higher than the control (21.3 ± 2.1 LMH) and J _(s) decreased to about 12%.
机译：在这项研究中，碳纳米管（CNTs）被磺化基团修饰，并掺入正向渗透（FO）膜的活性层中，以获得理想的薄膜纳米复合材料（TFN）FO膜。添加了不同浓度的磺化碳纳米管（SCNT），并研究了它们对FO膜的影响，包括亲水性，粗糙度，膜​​形态和FO性能。加入SCNT后，膜表面变得更光滑，更致密，亲水性也显着提高。关于FO性能，SCNTs官能化的FO膜表现出较高的水通量（J_（w））和较低的反向盐通量（J_（s））。通过使用1 M NaCl溶液作为汲取溶液（DS）和去离子（DI）水作为进料溶液（FS）达到29.9±1.6 LMH的最佳J _（w），比对照（21.3）高出近140％ ±2.1 LMH）和J_（s）降低至约12％。

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