用于气体分离的超薄,高负载混合矩阵膜的固体溶剂处理
Guining Chen1, Cailing Chen2, Yanan Guo1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211800, China.
概括
研究人员使用一种新的固体溶剂方法开发了超薄混合基质膜 (MMM). 这些先进的MMM可以在高度的填充剂中实现更高的气体分离性能.
科学领域:
- 材料科学
- 化学工程
- 纳米技术
背景情况:
- 混合矩阵膜 (MMM) 通过将聚合物与填充物结合,提供分子分离的潜力.
- 挑战包括控制界面兼容性和实现超薄的选择性层,特别是在高填充量时.
研究的目的:
- 开发一种新的加工策略,用于制造具有高填充量的超薄MMM.
- 为了提高MMM的气体分离性能.
主要方法:
- 使用聚合物作为金属盐的溶剂,采用了固体溶剂加工策略.
- 这形成了一个超薄的前体层,固定金属盐并控制其转化为金属有机框架 (MOF).
- 该方法促进了MOF在聚合物矩阵中的粘附.
主要成果:
- 制造超薄的MMM,其厚度低于100纳米,填充量高达80体积%.
- 由此产生的膜显著增强了气体选性能.
- 透度和/或二氧化选择性比最先进的膜高一到两级.
结论:
- 固体溶剂加工策略对于制造高性能超薄MMM是有效的.
- 这种方法克服了MMM在高填充量时的界面兼容性和处理方面的限制.
- 开发的MMM显示了先进气体分离应用的特殊潜力.
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