组装-解离-重建合成共价有机框架膜的高连续性高效的CO2分离
Hao Zhang1, Tianci Shao1, Zeliang Cheng1
1Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Angewandte Chemie (International ed. in English)
|July 8, 2024
概括
研究人员开发了一种新方法,以创建连续的共价有机框架 (COF) 膜,以有效地分离CO2/N2. 这种组装-解离-重建技术产生了对气体分离应用至关重要的高性能膜.
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.
- 纳米技术 纳米技术
背景情况:
- 聚合有机框架 (COF) 是先进的多孔材料,具有基于膜的分离的显著潜力.
- 在COF膜中实现高连续性对于高效的气体分离至关重要,特别是对于CO2/N2混合物.
- 当前的制造方法在生产无缺陷,连续的COF膜方面面临着挑战.
研究的目的:
- 开发一种用于制造专为CO2/N2分离的连续COF膜的新策略.
- 研究组装-解离-重建方法,以创建高性能COF膜.
- 通过精确的结构控制,增强COF膜的气体分离特性.
主要方法:
- 一个母COF用双节点化物和三节点氨基单体合成.
- 基因COF被分离成高比例纳米片.
- 通过水蒸发过程中的表面反应,纳米薄膜被重建成无裂纹的膜.
主要成果:
- 制造的COF膜呈现出高晶度和开放的孔隙.
- 膜表现出对二氧化碳吸附的强烈亲和力,而不是N2.
- 获得的CO2透率>1060GPU和CO2/N2选择性>30.6.6.
结论:
- 组装-解离-重建策略是制造连续,高性能COF膜的有效方法.
- 该方法为精确制造气体分离膜提供了有价值的指导.
- 开发的COF膜对高效的CO2/N2分离应用有很大的前景.
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