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Construction of facilitated mass transfer composite membranes with triple-layer water nanochannel architecture for forward osmosis process using cGO-coated polysulfone separation membrane as the substrate
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-08-02 , DOI: 10.1039/d2en00485b Hongbin Li 1 , Wenying Shi 1, 2 , Yuheng Su 1 , Mengjie Fan 1 , Tengfei Li 1 , Sisi Ma 1 , Yin Tian 1 , Zongsheng Wang 1
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-08-02 , DOI: 10.1039/d2en00485b Hongbin Li 1 , Wenying Shi 1, 2 , Yuheng Su 1 , Mengjie Fan 1 , Tengfei Li 1 , Sisi Ma 1 , Yin Tian 1 , Zongsheng Wang 1
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Forward osmosis (FO) composite membrane with triple-layer water nanochannel architecture was constructed to improve membrane permeability. A hydrophilic carboxylated graphene oxide (cGO)–polyamide (PA) composite was prepared through interfacial polymerization (IP) of m-phenylenediamine (MPD) and trimesoyl chloride (TMC). The cGO nanosheet-coated polysulfone (PSF) separation membrane was developed and used as the substrate via a facile vacuum suction filtration (VSF) method. The microstructure and separation performance of different FO composite membranes were compared and analyzed by SEM, AFM) and FO permselectivity performance test. With the increase of cGO concentration in the coating solution, the WCA of the cGO-coated PSF membrane decreased, accompanied by an increase in water flux. When the cGO concentration was 40 mg L−1, the WCA and pure water flux of the modified PSF membrane can reach 42° and 138.6 L m−2 h−1, which were 41.0% lower and 69.5% higher than those of the pristine PSF membrane, respectively. The triple-layer water nanochannel architecture, composed of the PA top layer, cGO–PA layer and cGO nanosheet layer, of the FO composite membrane facilitated rapid water longitudinal transport and hence increased the water flux by 60% without weakening the selective separation characteristics (using 0.5 mol L−1 NaCl aqueous solution and pure water as the draw solution and feed solution, respectively). Finally, a three-cycle operation was performed to evaluate membrane durability and the water mass transport model of the cGO-coated FO membrane was proposed.
中文翻译：
以cGO包覆的聚砜分离膜为基材构建具有三层水纳米通道结构的促进传质复合膜用于正向渗透过程
构建了具有三层水纳米通道结构的正向渗透（FO）复合膜，以提高膜的渗透性。通过间苯二胺（MPD）和均苯三甲酰氯（TMC）的界面聚合（IP）制备亲水性羧化氧化石墨烯（cGO）-聚酰胺（PA）复合材料。开发了 cGO 纳米片包覆的聚砜 (PSF) 分离膜，并通过一种简便的真空抽滤（VSF）方法。通过SEM、AFM)和FO选择渗透性能测试对不同FO复合膜的微观结构和分离性能进行了对比分析。随着包覆溶液中cGO浓度的增加，cGO包覆的PSF膜的WCA降低，同时水通量增加。当cGO浓度为40 mg L -1时，改性PSF膜的WCA和纯水通量可以达到42°和138.6 L m -2 h -1，分别比原始 PSF 膜低 41.0% 和高 69.5%。FO复合膜的三层水纳米通道结构，由PA顶层、cGO-PA层和cGO纳米片层组成，促进了水的快速纵向传输，因此在不削弱选择性分离特性的情况下将水通量提高了60%。分别使用 0.5 mol L -1 NaCl 水溶液和纯水作为汲取溶液和进料溶液）。最后，进行三循环操作以评估膜的耐久性，并提出了 cGO 涂层 FO 膜的水传质模型。
更新日期：2022-08-02
中文翻译：
以cGO包覆的聚砜分离膜为基材构建具有三层水纳米通道结构的促进传质复合膜用于正向渗透过程
构建了具有三层水纳米通道结构的正向渗透（FO）复合膜，以提高膜的渗透性。通过间苯二胺（MPD）和均苯三甲酰氯（TMC）的界面聚合（IP）制备亲水性羧化氧化石墨烯（cGO）-聚酰胺（PA）复合材料。开发了 cGO 纳米片包覆的聚砜 (PSF) 分离膜，并通过一种简便的真空抽滤（VSF）方法。通过SEM、AFM)和FO选择渗透性能测试对不同FO复合膜的微观结构和分离性能进行了对比分析。随着包覆溶液中cGO浓度的增加，cGO包覆的PSF膜的WCA降低，同时水通量增加。当cGO浓度为40 mg L -1时，改性PSF膜的WCA和纯水通量可以达到42°和138.6 L m -2 h -1，分别比原始 PSF 膜低 41.0% 和高 69.5%。FO复合膜的三层水纳米通道结构，由PA顶层、cGO-PA层和cGO纳米片层组成，促进了水的快速纵向传输，因此在不削弱选择性分离特性的情况下将水通量提高了60%。分别使用 0.5 mol L -1 NaCl 水溶液和纯水作为汲取溶液和进料溶液）。最后，进行三循环操作以评估膜的耐久性，并提出了 cGO 涂层 FO 膜的水传质模型。
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