Asymmetric membranes for gas separation: interfacial insights and manufacturing.
Asymmetric membranes for gas separation: interfacial insights and manufacturing.
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作者：
现有技术的气体分离膜技术联合收割机结合了聚合物和其它材料（例如金属-有机骨架）的性质以产生混合基质膜（MMM）。尽管与纯聚合物膜相比，这些膜显示出增强的气体分离性能;但它们的结构仍存在主要挑战，包括表面缺陷、不均匀的填料分散和构成材料的不相容性。因此，为了避免当今膜制造方法带来的这些结构问题，我们采用电流体动力发射和溶液浇铸作为混合膜制造方法，以生产具有改善的气体渗透性和对CO2/N2、CO2/CH 4和O2/N2的选择性的ZIF-67/乙酸纤维素不对称膜。使用严格的分子模拟来揭示关键的ZIF-67/醋酸纤维素界面现象（例如，更高的密度、链刚性等）这是在设计最佳复合膜时必须考虑的。特别是，我们证明了不对称配置有效地利用这些界面特征，以产生优于MMM的膜上级。这些见解与拟议的制造技术相结合，可以加速膜在碳捕获、制氢和天然气升级等可持续过程中的部署。通过电流体动力学发射制造不对称膜，与混合基质膜相比，显示出增强的性能。这些膜利用M0 F-聚合物结晶界面来促进气体的分离。
State-of-the-art gas separation membrane technologies combine the properties of polymers and other materials, such as metal–organic frameworks to yield mixed matrix membranes (MMM). Although, these membranes display an enhanced gas separation performance, when compared to pure polymer membranes; major challenges remain in their structure including, surface defects, uneven filler dispersion and incompatibility of constituting materials. Therefore, to avoid these structural issues posed by today's membrane manufacturing methodologies, we employed electrohydrodynamic emission and solution casting as a hybrid membrane manufacturing method, to produce ZIF-67/cellulose acetate asymmetric membranes with improved gas permeability and selectivity for CO2/N2, CO2/CH4, and O2/N2. Rigorous molecular simulations were used to reveal the key ZIF-67/cellulose acetate interfacial phenomena (e.g., higher density, chain rigidity, etc.) that must be considered when engineering optimum composite membranes. In particular, we demonstrated that the asymmetric configuration effectively leverages these interfacial features to generate membranes superior to MMM. These insights coupled with the proposed manufacturing technique can accelerate the deployment of membranes in sustainable processes such as carbon capture, hydrogen production, and natural gas upgrading. Asymmetric membranes were manufactured via electrohydrodynamic emission, displaying enhanced performance compared to mixed matrix membranes. These membranes leveraged MOF–polymer crystalline interfaces to promote the separation of gas.
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影响因子：
11.9
作者：
Li, Yifan;He, Guangwei;Jiang, Zhongyi
通讯作者：
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影响因子：
3.2
作者：
Gopi, Sreerag;Pius, Anitha;Thomas, Sabu
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DOI：
10.1073/pnas.2114964119
发表时间：
2022-01-04
影响因子：
11.1
作者：
He S;Zhu B;Jiang X;Han G;Li S;Lau CH;Wu Y;Zhang Y;Shao L
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影响因子：
56.9
作者：
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通讯作者：
Yaghi, Omar M.
DOI：
10.1016/j.jrras.2014.01.003
发表时间：
2014-04-01
影响因子：
1.7
作者：
Kamal, H.;Abd-Elrahim, F. M.;Lotfy, S.
通讯作者：
Lotfy, S.