Hyperbranched polymer composite membrane using water as solvent for separating aromatic/aliphatic hydrocarbon mixtures
Hyperbranched polymer composite membrane using water as solvent for separating aromatic/aliphatic hydrocarbon mixtures
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DOI：
10.1016/j.seppur.2017.02.017
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发表时间：
2017-05
影响因子：
8.6
通讯作者：
Naixin Wang;Tong-chi Wu;L. Wang;Li Xiaoting;Cui Zhao;Jie Li;S. Ji
中科院分区：
文献类型：
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作者：
Naixin Wang;Tong-chi Wu;L. Wang;Li Xiaoting;Cui Zhao;Jie Li;S. Ji
芳香族/脂肪族混合物的分离在化学工业中具有重要意义。渗透汽化技术因其能耗低、环境友好等优点而受到越来越多的关注。然而，膜的形成大多使用有毒的有机溶剂，而在本研究中，使用水来代替制备分离芳香族/脂肪族混合物的膜。将W3000分散在水中形成胶束，然后通过负压驱动组装法将其沉积在管状多孔陶瓷基体表面。采用TEM、SEM、FTIR等手段对乳液及复合膜进行了表征。用NMR XLD分析系统测试了W3000的交联密度。该膜用于分离芳香族/脂肪族混合物通过渗透汽化。结果表明，以水为溶剂制备的复合膜对甲苯/正庚烷混合物的渗透汽化分离指数（PSI）比以DMF为溶剂制备的复合膜提高了3.3倍。所制备的复合膜具有较好的综合渗透汽化性能。这种简单的策略可能具有潜在的应用渗透汽化分离芳香族/脂肪族混合物在工业中。
The separation of aromatic/aliphatic mixtures is significant in chemical industry. Pervaporation has attracted increasing attention due to its low energy consumption and environmentally friendly process. However, the formation of membranes mostly use toxic organic solvents, whereas in this study water was used instead to prepare membrane in separating aromatic/aliphatic mixtures. W3000 were dispersed in water to form micelles, which were then deposited onto the surface of the tubular porous ceramic substrate through the negative pressure-driven assembly method. The emulsion and composite membranes were characterized by TEM, SEM and FTIR. The crosslinking density of W3000 was also tested using NMR XLD analyzing system. The membranes were used for separating aromatic/aliphatic mixtures through pervaporation. The results showed that compared with the membrane prepared by DMF, the pervaporation separation index (PSI) of the composite membrane formed using water as solvent was 3.3-fold increased for separating toluene/n-heptane mixtures. The as-prepared composite membranes showed a better comprehensive pervaporation performance. This facile strategy may have a potential in the application of pervaporation for separating aromatic/aliphatic mixtures in industry.