Branched polyamides (BPAs) were prepared through a polycondensation method and then blended with poly(acrylonitrile) (PAN; 3:1) to construct the nanocomposite membranes having various concentrations of graphene oxide (GO) (2 and 5 wt%). The BPA/PAN and BPA/PAN/GO membranes were applied for selective removal of chlorinated volatile organic compounds (Cl-VOCs) from water by pervaporation. Impacts of feed composition, GO content and distinct feed types were investigated on pervaporation performance. Membranes were water selective and the permeation rate incremented with GO elevation. The highest permeation rate (203 g/m² h) and separation factor (10) were detected for BPA/PAN/GO-5 nanocomposite membrane containing 5 wt% GO for separating the pentachloroethane/water mixtures at 30 °C for 0.1 wt% pentachloroethane in feed. Separation of pentachloroethane/water mixture proceeded easier than those of 1,1,1,2-tetrachloroethane/water, trichloroethylene/water, and 1,2-dichloroethylene/water mixtures because of the larger molecular size of pentachloroethane.

中文翻译：

---

新型支化聚酰胺/聚（丙烯腈）/氧化石墨烯膜，用于通过全蒸发从水中分离氯代挥发性有机化合物

通过缩聚法制备支化聚酰胺（BPA），然后将其与聚（丙烯腈）（PAN; 3：1）混合以构建具有各种浓度的氧化石墨烯（GO）（2和5 wt％）的纳米复合膜。将BPA / PAN和BPA / PAN / GO膜用于通过全蒸发从水中选择性去除氯化挥发性有机化合物（Cl-VOC）。研究了饲料组成，GO含量和不同饲料类型对全蒸发性能的影响。膜是水选择性的，并且渗透率随着GO的升高而增加。最高渗透率（203 g / m ²h）和分离因子（10）对于含有5wt％GO的BPA / PAN / GO-5纳米复合膜进行检测，以在进料中以0.1wt％五氯乙烷在30℃下分离五氯乙烷/水混合物。由于五氯乙烷的分子较大，因此五氯乙烷/水混合物的分离比1,1,1,2-四氯乙烷/水，三氯乙烯/水和1,2-二氯乙烯/水的混合物更容易进行。