氨基胺改性UiO-66@PIM-1混合矩阵膜增强CO2分离和抗衰老性能
Jiaming Gao1, Yongchao Sun1, Feifei Kang1
1State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.
Membranes
|September 27, 2023
概括
这项研究开发了使用PIM-1聚合物和氨基胺修饰的UiO-66 (UiO-66-AO) 填充剂进行增强二氧化碳 (CO2) 分离的先进混合矩阵膜 (MMM). 新的膜显示出更好的二氧化碳透性和选择性,超过了以前的基准.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 混合矩阵膜 (MMM) 经常存在填充剂-聚合物兼容性差,导致孔隙不选择性和性能降低.
- 有效的二氧化碳 (CO2) 分离技术对于缓解气候变化和实现工业气体净化至关重要.
研究的目的:
- 开发具有增强CO2分离性能和更好的稳定性的新型MMM.
- 调查胺素功能化的UiO-66 (UiO-66-AO) 填充剂在改善聚合物矩阵兼容性和CO2传输方面的作用.
主要方法:
- 使用PIM-1作为聚合物矩阵和UIO-66-AO作为填充剂制造MMM.
- 膜结构的特征,气体透性 (CO2,N2) 和选择性.
- 对罗伯森上限的膜性能评估和对38天的老化性能评估.
主要成果:
- 与纯PIM-1膜相比,UiO-66-AO@PIM-1MMM的CO2透率增加了35.2%,CO2/N2选择性增加了45.2%.
- 实现了7535.5的二氧化碳透率和26.9的二氧化碳2/N2选择性,超过了2008年罗伯森上限.
- 膜表现出改善的老化特性,在38天后保留了大约74%的原始二氧化碳透性.
结论:
- 在UIO-66-AO和PIM-1之间的结网显著提高了接口兼容性.
- 在UiO-66-AO中存在的氨基基胺基组促进了选择性二氧化碳的运输,从而提高了膜的性能.
- UiO-66-AO@PIM-1 MMM显示了高效和稳定的二氧化碳分离应用的巨大潜力.
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