In order to make membrane separation technologies more cost‐competitive with the well‐established processes that are energy intensive for gas/vapor separation, a defect‐free membrane with a high gas permeance is necessary. However, it remains challenging to meet these needs because of the difficulties in developing a suitable material and process that are economical and practical. Herein, a novel and straightforward strategy is presented to produce a defect‐free hollow fiber composite membrane using a highly crosslinked polydimethylsiloxane (PDMS) synthesized by using a postcrosslinking method. The PDMS can be directly coated on a polyacrylonitrile (PAN) membrane substrate, and the resultant PDMS/PAN composite membrane has ultrahigh C₃H₈ and C₃H₆ permeances that are higher than 10 000 and 11 000 GPU, respectively, and the corresponding permselectivity of C₃H₈/N₂ and C₃H₆/N₂ are about 21 and 24, respectively. The newly developed methods and materials may open up a new cost‐effective method to fabricate next‐generation composite membranes for the recovery of hydrocarbons, organic vapors, and gases.

中文翻译：

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通过高交联PDMS的超高通量复合中空纤维膜，用于回收烃：丙烷和丙烯

为了使膜分离技术与在气体/蒸汽分离方面消耗大量能量的成熟工艺更具成本竞争力，必须使用具有高透气性的无缺陷膜。然而，由于在开发经济和实用的合适材料和工艺方面存在困难，因此满足这些需求仍然具有挑战性。在此，提出了一种新颖而直接的策略，该方法使用通过后交联法合成的高度交联的聚二甲基硅氧烷（PDMS）来生产无缺陷的中空纤维复合膜。PDMS可以直接涂覆在聚丙烯腈（PAN）膜基材上，所得的PDMS / PAN复合膜具有超高的C ₃ H ₈和C ₃ H ₆分别高于10 000和11 000 GPU的磁导率，以及C ₃ H ₈ / N ₂和C ₃ H ₆ / N ₂的相应磁导率分别约为21和24。新开发的方法和材料可能会开辟一种新的具有成本效益的方法，以制造用于回收碳氢化合物，有机蒸气和气体的下一代复合膜。