一、前言近几十年来,人们对聚合物透气性进行了广泛研究,证明聚二甲基硅氧烷(PDMS)是透气性最好的合成高分子膜材料。随着制膜技术和工艺的不断发展与完善,气体膜分离技术已在部分领域得到应用。空气中氧气的富集是该项技术最重要的一个应用方向。目前,商品富氧器中使用的分离膜材料基本为PDMS、PDMS改性聚合物[如聚碳酸酯与PDMS嵌段共聚物(PC—PDMS)、聚苯醚与PDMS接枝共聚物(PPO—PDMS)、聚对羟基苯乙烯与PDMS交联共聚物(PHS—PDMS)等]及其它一些透气性较好的高分 I. Introduction In recent decades, extensive research has been conducted on the permeability of polymers to prove that polydimethylsiloxane (PDMS) is the best breathable synthetic polymer membrane material. With the continuous development and improvement of membrane technology and process, gas membrane separation technology has been applied in some areas. The enrichment of oxygen in the air is one of the most important applications of this technology. At present, the separation membrane material used in the product oxygenator is basically PDMS, PDMS modified polymer [such as polycarbonate and PDMS block copolymer (PC-PDMS), polyphenylene ether and PDMS graft copolymer (PPO- PDMS), poly-p-hydroxystyrene and PDMS cross-linked copolymer (PHS-PDMS), etc.] and some other good permeability of the score