<br>用于复合膜和气体分离应用的 2D MOF 和沸石：简要回顾,ACS Materials Au

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用于复合膜和气体分离应用的 2D MOF 和沸石：简要回顾
ACS Materials Au ( IF 5.7 ) Pub Date : 2023-12-12 , DOI: 10.1021/acsmaterialsau.3c00072
Minsu Kim ₁ , Wooyoung Choi ₁ , Choong Hoo Lee ₁ , Dae Woo Kim ₁

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由于其经济可行性和可加工性，商业膜主要由聚合物制成。与蒸馏等传统分离技术相比，这种选择在能源效率、成本效益和操作简单性方面具有显着优势。然而，聚合物膜本质上表现出渗透性和选择性之间的权衡，这在罗伯逊上限中进行了总结。为了有可能超越这些限制，混合基质膜（MMM）可以作为一种替代解决方案，它可以通过将聚合物与金属有机框架（MOF）和沸石等无机添加剂相结合来构建。加入 MOF 纳米片和沸石纳米片等高纵横比填料非常重要。这种结合不仅提高了分离过程的效率，而且增强了膜的机械鲁棒性。我们概述了生产二维 (2D) 晶体（包括具有高纵横比的纳米晶体）的合成技术，并提供了将其集成到膜中以定制分离性能的示例。此外，我们提出了基于高纵横比材料的 MMM 领域的潜在研究轨迹，并得到基于数学模型的性能预测的支持。

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2D MOFs and Zeolites for Composite Membrane and Gas Separation Applications: A Brief Review

Commercial membranes have predominantly been fabricated from polymers due to their economic viability and processability. This choice offers significant advantages in energy efficiency, cost-effectiveness, and operational simplicity compared to conventional separation techniques like distillation. However, polymeric membranes inherently exhibit a trade-off between their permeability and selectivity, which is summarized in the Robeson upper bound. To potentially surpass these limitations, mixed-matrix membranes (MMMs) can be an alternative solution, which can be constructed by combining polymers with inorganic additives such as metal–organic frameworks (MOFs) and zeolites. Incorporating high-aspect-ratio fillers like MOF nanosheets and zeolite nanosheets is of significant importance. This incorporation not only enhances the efficiency of separation processes but also reinforces the mechanical robustness of the membranes. We outline synthesis techniques for producing two-dimensional (2D) crystals (including nanocrystals with high aspect ratio) and provide examples of their integration into membranes to customize separation performances. Moreover, we propose a potential trajectory for research in the area of high-aspect-ratio materials-based MMMs, supported by a mathematical-model-based performance prediction.

更新日期：2023-12-12

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