构建界面兼容的Por-POF/PIM-1混合基质膜用于CO2/N2高效分离
Building interfacial compatible Por-POF/PIM-1 mixed matrix membranes for efficient CO2/N2 separation
王晓楠 1倪飞 1李海壮 1沈舒欣 1孙腾腾 1王康军 1于广莉1
作者信息
- 1. 沈阳化工大学化学工程学院,沈阳 110142
- 折叠
摘要
混合基质膜(MMMs)在实现优异的CO2分离方面潜力很大,但其性能往往受到填料与基质之间界面兼容性差的限制.本研究将卟啉基多孔有机框架(Por-POF)分散在可溶性的固有微孔聚合物(PIM-1)中,制备了 一系列高渗透选择性MMMs.Por-POF的纯有机属性增强其与纯有机聚合物基质的相互作用,从而制备界面相容性良好的膜材料.多孔的Por-POF可以增加膜的自由体积分数,提高了薄膜的渗透通量.此外,Por-POF孔壁上富集了大量氮,对CO2具有较强的吸附作用,从而提高CO2/N2选择性.气体渗透实验表明,与纯PIM-1膜相比,Por-POF/PIM-1膜的CO2渗透通量和CO2/N2选择性分别提高了 157％和64％.本研究为合理设计和构建高性能的分离膜提供了一种独特的思路.
Abstract
Mixed matrix membranes(MMMs)have great potential to achieve excellent CO2 separation,while their performances are often limited by poor interfacial compatibility between fillers and matrix.Here,a rational design and facile construction of highly permeable MMMs is presented by dispersing porphyrin based porous organic framework(Por-POF)within solution-processable polymer of intrinsic microporosity(PIM-1).The pure organic nature of Por-POF enhances its interaction with the pure organic polymer matrixes,leading to good interfacial compatibility in the resultant MMMs.Porous Por-POF fillers can increase the membrane fractional free volume that enhances the membrane gas permeability.Besides,Por-POF exhibits enriched nitrogen in its pore walls that has a strong adsorption effect on CO2,thus achieving higher CO2/N2 selectivity.Gas permeations demonstrate that CO2 permeability and CO2/N2 selectivity for Por-POF/PIM-1 increased by 157％and 64％,respectively,compared with pure PIM-1.This study will further bring unique insights for the rational design and construction of high performances separation membranes.
关键词
混合基质膜/Por-POF/界面相容性/CO2分离Key words
mixed matrix membranes/Por-POF/interfacial compatibility/CO2 separation引用本文复制引用
基金项目
大学生创新创业训练项目(202210149011)
辽宁省博士启动基金项目(2022-BS-213)
国家自然科学基金项目(22208224)
出版年
2024
NETL
NSTL
万方数据