Abstract A novel layer consisting of nano graphene oxide (NGO) sheets was created with disordered arrangement and dual-channel structures on modified Polyphenylene sulfide (PPS) support surface. Polyamide (PA) and Piperazine (PIP) were used to cross-link and fasten the NGO layer, constructing water molecule transport channels. Meanwhile, the interlayer spacing of NGO and transport capacity of polyamide permeation channels could be changed by adjusting PIP content, thereby a large number of small-sized vacancy were formed as water molecular transport channels and played a role in intercepting small molecules and metal salts. Physicochemical structure and application performance of the composite membranes were analyzed using various testing methods, showing that the introduction of polyamide greatly increased water flux and metal salts rejection rate. In particular, M-3 membrane with the best performance was achieved with salt rejections of 48.24%, 92.14%, 92.93% and 91.23% for NaCl, CuSO4, ZnSO4 and AlCl3, and a water flux of 40.80 LMH at 0.6 MPa.

中文翻译：

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用于海水淡化的无序排列混合PPS复合膜的NGO/PA层

摘要 在改性聚苯硫醚 (PPS) 支撑表面上创建了一种由纳米氧化石墨烯 (NGO) 片组成的新型层，具有无序排列和双通道结构。聚酰胺（PA）和哌嗪（PIP）用于交联和固定非政府组织层，构建水分子传输通道。同时，通过调节PIP含量可以改变NGO的层间距和聚酰胺渗透通道的传输能力，从而形成大量小空位作为水分子传输通道，起到拦截小分子和金属盐的作用。采用多种测试方法对复合膜的理化结构和应用性能进行了分析，表明聚酰胺的引入大大提高了水通量和金属盐去除率。尤其是性能最佳的 M-3 膜，对 NaCl、CuSO4、ZnSO4 和 AlCl3 的脱盐率分别为 48.24%、92.14%、92.93% 和 91.23%，在 0.6 MPa 下的水通量为 40.80 LMH。