具有史无前例的烯/分离性能的异质培养的化物伊米达酸框架膜
Hyuk Taek Kwon, Hae-Kwon Jeong, Albert S Lee1
1Materials Architecturing Research Center, Korea Institute of Science and Technology , Hwarang-ro 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea.
Journal of the American Chemical Society
|September 15, 2015
概括
研究人员开发了新的ZIF-67膜,以有效地分离/,克服了当前聚合物材料的局限性. 这些先进的膜为传统的冷蒸方法提供了有前途的节能替代方案.
科学领域:
- 材料科学
- 化学工程
- 分离科学
背景情况:
- 通过冷蒸进行/分离至关重要,但耗费大量能源.
- 基于膜的分离提供了能源效率,但缺乏合适的商业材料.
- 焦化物伊米达酸框架 (ZIF-8) 是有前途的,但在膜中的微结构控制是具有挑战性的.
研究的目的:
- 开发用于有效分离/的先进膜.
- 通过探索ZIF-67来克服ZIF-8膜性能方面的局限性.
- 研究改善膜微观结构的异质生长策略.
主要方法:
- 在ZIF-8种子层上产生ZIF-67的异质生长,从而形成良好的交织膜.
- 在ZIF-67膜上增生ZIF-8层以进一步增强微观结构.
- 用于/分离的膜特性.
主要成果:
- 制造出第一个完善的ZIF-67膜.
- 使用ZIF-67膜实现了令人印象深刻的高/分离能力.
- 在三级ZIF-8/ZIF-67膜中观察到前所未有的高分离因子 (∼200),可能是由于增强的粒度边界结构.
结论:
- 新的异质生长策略使得/分离的高性能ZIF-67膜成为可能.
- 开发的膜比现有的聚合物材料具有显著的进步.
- 这些发现为节能工业分离工艺铺平了道路.
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