Li Yonghao, Zhao Yuntao, Tian Enling, Ren Yiwei
Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences No. 266 Fangzheng Avenue, Shuitu Hi-tech Industrial Park, Shuitu Town, Beibei District Chongqing 400714 China
University of Chinese Academy of Sciences Beijing 100049 China.
RSC Adv. 2018 Dec 7;8(71):41032-41039. doi: 10.1039/c8ra08900k. eCollection 2018 Dec 4.
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 ( ) and lower reverse salt flux ( ). The optimal 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 decreased to about 12%.
在本研究中，碳纳米管（CNTs）用磺化基团进行了改性，并被纳入到正向渗透（FO）膜的活性层中，以制备出理想的薄膜纳米复合（TFN）FO膜。添加了不同浓度的磺化碳纳米管（SCNTs），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。随着SCNTs的添加，膜表面变得更光滑、更致密，亲水性也显著提高。关于FO性能，SCNTs功能化的FO膜表现出更高的水通量（ ）和更低的反向盐通量（ ）。以1 M NaCl溶液作为汲取液（DS）和去离子（DI）水作为进料液（FS）时，实现了29.9±1.6 LMH的最佳 ，比对照（21.3±2.1 LMH）高出近140%，并且 降低到约12%。
