金属有机框架 (MOF) 单层和独立多层的自组装
Yuji Katayama1,2, Mark Kalaj1, Kyle S Barcus1
1Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States.
Journal of the American Chemical Society
|November 30, 2019
概括
研究人员使用金属有机框架 (MOF) 纳米粒子制造了第一个自组装的多孔单层膜. 这些先进的MOF薄膜为高功能的多孔膜和涂层提供了新的可能性.
科学领域:
- 材料科学
- 纳米技术
- 化学工程
背景情况:
- 金属有机框架 (MOF) 具有可调节的孔隙性和高表面积,使其对各种应用具有吸引力.
- 制造具有可控形态的独立MOF材料仍然是一个重大挑战.
- 现有的方法通常会导致对片架构的控制有限.
研究的目的:
- 开发一种用于制造MOF纳米粒子自组合多孔单层和多层膜的新方法.
- 调查液体空气接口的自组装过程.
- 展示基于MOF的独立片和异构结构的创造潜力.
主要方法:
- 在液体-空气接口上自组装MOF纳米粒子以形成单层 (SAMM).
- 用聚甲酸 (PMMA) 修改MOF颗粒的表面,使用组胺来促进自我组装.
- 堆叠SAMM以创建多层薄膜和MOF/聚合物异构结构.
- 将SAMM涂在微粒上,使其可以作为独立的薄膜进行处理.
主要成果:
- 首次成功制造出完全由MOF纳米粒子组成的自组合多孔单层薄膜.
- 在单层中达到高MOF含量 (87%重量,89%体积).
- 证明能够将单层叠加到多层薄膜,包括交替的MOF/聚合物结构.
- 从仅仅五个叠加的层中创建独立的光MOF薄膜.
结论:
- 在液体-空气接口上自组装为制造高度排序的MOF薄膜提供了有效的途径.
- 开发的方法可以创建具有高级应用潜力的独立多层MOF结构.
- 这些MOF单层代表了开发高功能的多孔膜和涂层的重大进步.
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