哌嗪鎓介导的交联聚酰亚胺-聚二甲基硅氧烷（PI-PDMS）共聚物膜：PDMS含量对CO分离的影响

You Hyelim, Hossain Iqubal, Kim Tae-Hyun

Organic Material Synthesis Laboratory, Department of Chemistry, Incheon National University Incheon 406-772 Korea

Research Institute of Basic Sciences, Incheon National University Incheon 406-772 Korea.

RSC Adv. 2018 Jan 3;8(3):1328-1336. doi: 10.1039/c7ra10949k. eCollection 2018 Jan 2.

We synthesized copolymers consisting mostly of physically stable rigid polyimide (PI) and a low content of highly permeable rubbery polydimethylsiloxane (PDMS), that were crosslinked by CO-philic ionic piperazinium groups attached to the side chains of the copolymers. These crosslinked copolymers (xPI-PDMSs) were fashioned into membranes that showed very high levels of thermochemical stability and excellent CO separation performance ( of 799 Barrer and CO/N permselectivity of 15.7). The inclusion of the piperazinium groups not only endowed these xPI-PDMS membranes with increased selectivity for CO, but also good resistance to CO plasticization. The effect of PDMS content on morphology and CO separation properties of xPI-PDMS was also investigated.

我们合成了主要由物理稳定的刚性聚酰亚胺（PI）和低含量高渗透性橡胶状聚二甲基硅氧烷（PDMS）组成的共聚物，这些共聚物通过连接在共聚物侧链上的亲CO离子哌嗪鎓基团进行交联。这些交联共聚物（xPI-PDMSs）被制成具有非常高的热化学稳定性和优异CO分离性能（渗透率为799 Barrer，CO/N渗透选择性为15.7）的膜。哌嗪鎓基团的引入不仅赋予这些xPI-PDMS膜对CO更高的选择性，还赋予其良好的抗CO增塑性能。还研究了PDMS含量对xPI-PDMS形态和CO分离性能的影响。