ABSTRACT Herein, a novel branched polyamide (BPA-1and BPA-2) was synthesised by direct polycondensation using branched polyethyleneimine and two different dicarboxylic acids (adipic acid and Hexafluoroisopropylidene bis benzoic acid) as monomers. The newly developed BPA was blended with poly (acrylonitrile) (PAN) separately at ratio of 3:1 (BPA/PAN) to form a branched BPA/PAN membrane via the solution-casting method. The prepared membrane was characterised using FTIR, X-ray, SEM and TGA and so that used for the dehydration of alcohols by pervaporation process. The experimental results revealed that the permeation flux of the BPA/PAN membrane increased with increasing feed ethanol concentration and feed temperature, but an increase in the number of carbon atoms inalcohol results in an increase in the permeation rate. The best separation performance could be achieved for the BPA-2/PAN membrane at 60°C for 80% ethanol in the feed with a total flux of 925 g m−2 h−1 and a separation selectivity of 1696.

中文翻译：

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支化聚酰胺/聚丙烯腈共混膜：合成、表征和渗透蒸发应用

摘要 在此，以支化聚乙烯亚胺和两种不同的二元羧酸（己二酸和六氟异亚丙基双苯甲酸）为单体，通过直接缩聚反应合成了一种新型支化聚酰胺（BPA-1 和 BPA-2）。新开发的 BPA 与聚丙烯腈 (PAN) 分别以 3:1 (BPA/PAN) 的比例混合，通过溶液浇铸法形成支化的 BPA/PAN 膜。使用FTIR、X射线、SEM和TGA对制备的膜进行了表征，并用于通过渗透蒸发工艺脱水醇。实验结果表明，BPA/PAN 膜的渗透通量随着进料乙醇浓度和进料温度的增加而增加，但醇中碳原子数的增加导致渗透率增加。