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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of Soluble Polyimides and Ultrafiltration Membrane Performances
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Preparation of Soluble Polyimides and Ultrafiltration Membrane Performances

机译：可溶性聚酰亚胺的制备及超滤膜性能

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摘要

Various soluble polyimides with bis[4-(3-aminophenoxy)phenyl]sulfone and three kinds of dianhydrides were prepared in a polar N-methyl-2-pyrrolidone solvent by the traditional chemical two-step method. All the polymers synthesized had good solubilities in polar solvents and excellent thermal properties. Wide-angle X-ray diffraction studies showed that all polyimides were amorphous. Polyimide ultrafiltration asymmetric membranes were successfully prepared by the traditional phase-inversion method. The cross sections of the polyimide ultrafiltration membranes showed a very thin surface layer and a porous sublayer. The pure water flux was very high and the solute rejection rate at poly(ethylene glycol) of MW 20,000 was above 90%.
机译：采用传统的化学两步法，在极性N-甲基-2-吡咯烷酮溶剂中，制备了具有双[4-（3-氨基苯氧基）苯基]砜和三种二酐的各种可溶性聚酰亚胺。合成的所有聚合物在极性溶剂中均具有良好的溶解性和出色的热性能。广角X射线衍射研究表明，所有聚酰亚胺都是无定形的。采用传统的相转化方法成功制备了聚酰亚胺超滤不对称膜。聚酰亚胺超滤膜的横截面显示出非常薄的表面层和多孔的亚层。纯水通量非常高，分子量为20,000的聚乙二醇的溶质截留率高于90％。

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