Abstract Novel thin film composite membranes based on layer-by-layer (LbL) self-assembly of polyethyleneimine (PEI) and graphene oxide (GO) on chlorine-treated polyamide membranes were prepared for pervaporation dehydration of alcohols. To improve the membrane perfoarmance, the self-assembled bilayers were crosslinked with glutaraldehyde. A two-level factorial design was used to determine the effects of the main factors involved in the membrane preparation and their interactions on the permeation flux and separation factor. The impacts of the number of bilayers on the membrane performance were considered to gain an insight into the mass transfer resistance contributed by the bilayers. At 60 °C, the crosslinked (PEI/GO)7 LbL membrane showed a flux of 1770 and 1494 g/m2 h for ethanol/water and isopropanol/water mixtures, respectively, at 2 wt% water in feed, with a corresponding separation factor of 77 and 197. The long-term stability test showed the feasibility of the crosslinked membranes for alcohol dehydration.

中文翻译：

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氧化石墨烯和聚乙烯亚胺的逐层组装膜用于乙醇和异丙醇脱水

摘要 基于聚乙烯亚胺（PEI）和氧化石墨烯（GO）在氯处理的聚酰胺膜上逐层（LbL）自组装，制备了新型薄膜复合膜，用于醇的渗透蒸发脱水。为了提高膜性能，自组装双层与戊二醛交联。使用两水平因子设计来确定涉及膜制备的主要因素及其对渗透通量和分离因子的相互作用的影响。考虑双层数量对膜性能的影响，以深入了解双层所贡献的传质阻力。在 60 °C 时，交联 (PEI/GO)7 LbL 膜的乙醇/水和异丙醇/水混合物的通量分别为 1770 和 1494 g/m2 h，