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首页> 外文期刊>Separation and Purification Technology >Interfacial polymerized thin-film composite membranes for pervaporation separation of aqueous isopropanol solution
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Interfacial polymerized thin-film composite membranes for pervaporation separation of aqueous isopropanol solution

机译：用于异丙醇水溶液全蒸发分离的界面聚合薄膜复合膜

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摘要

High-performance polyamide thin-film composite membranes were successfully prepared using interfacial polymerization of triethylenetetramine (TETA) and trimesoyl chloride (TMC) on the surface of a modified polyacrylonitrile (mPAN) membrane for alcohol dehydration by pervaporation. Attenuated total reflection infrared spectroscopy (FTIR-ATR), scanning electron microscope (SEM), atomic force microscope (AFM) and the contact angle were used to characterize the chemical structures, morphologies and hydrophilicity of the composite membrane active layers. The best pervaporation performance was achieved by using the TETA-TMC/mPAN composite membrane that is prepared by immersing mPAN in 0.1 wt.% aqueous TETA solution for 5 s and then contact with 0.05 wt.% organic TMC solution for 10 s. The pervaporation separation of a 70 wt.% isopropanol-water mixture through the composite membrane with the ultra thin polyamide layer at 70 °C, the permeation rate and water concentration in permeate were 3.4 kg/m~2 h and higher than 99 wt.%, respectively. It was also found that TETA-TMC/mPAN exhibited superior performance to the composite membranes discussed in the literature.
机译：通过在改性聚丙烯腈（mPAN）膜表面进行三亚乙基四胺（TETA）和均苯三甲酰氯（TMC）的界面聚合，成功地制备了高性能聚酰胺薄膜复合膜，以通过全蒸发进行乙醇脱水。利用衰减全反射红外光谱（FTIR-ATR），扫描电子显微镜（SEM），原子力显微镜（AFM）和接触角表征了复合膜活性层的化学结构，形貌和亲水性。通过使用TETA-TMC / mPAN复合膜获得最佳的全蒸发性能，该复合膜是通过将mPAN浸入0.1 wt％的TETA水溶液中5 s，然后与0.05 wt％的有机TMC溶液接触10 s而制得的。 70wt。％的异丙醇-水混合物在70°C下通过具有超薄聚酰胺层的复合膜的渗透汽化分离，渗透速率和渗透液中的水浓度为3.4 kg / m〜2 h，高于99 wt。％。 ％， 分别。还发现，TETA-TMC / mPAN的性能优于文献中讨论的复合膜。

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