We fabricated a thin-film composite (TFC) forward osmosis (FO) membrane with an ultrathin spray-coated carbon nanotube (CNT) interlayer. The impact of the CNT interlayer on the polyamide (PA) layer structural properties and transport behavior in FO were investigated. Results indicate that the CNT interlayer provides an interface which enables the formation of a highly permeable and selective PA layer with a large effective surface area for water transport, while inhibiting the formation of a flower-like PA structure inside the substrate pores. The TFC-FO membrane with the CNT interlayer exhibited a much greater water flux than previously reported for FO membranes, while maintaining comparable salt rejection. Specifically, a membrane perm-selectivity or ratio of water (A) to salt permeability coefficients (B) (A/B value) of 39 bar^–1 was achieved for the TFC-PA-CNT membrane. Implications of the results for the fabrication of high-performance TFC-FO membranes are further discussed.

中文翻译：

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具有超薄喷涂碳纳米管夹层的高性能薄膜复合膜

我们制造了具有超薄喷涂碳纳米管（CNT）中间层的薄膜复合（TFC）正渗透（FO）膜。研究了CNT中间层对FO中聚酰胺（PA）层结构性能和传输行为的影响。结果表明，CNT中间层提供了一种界面，该界面使得能够形成具有高有效表面积的高渗透性和选择性PA层，用于水传输，同时抑制了基材孔内花状PA结构的形成。具有CNT中间层的TFC-FO膜的水通量比以前报道的FO膜大得多，同时保持了相当的除盐率。具体而言，膜的渗透选择性或水（A）与盐渗透系数的比值（TFC-PA-CNT膜的B）（A / B值）达到39 bar ^–1。进一步讨论了结果对制造高性能TFC-FO膜的影响。