Grafting thermally labile molecules on cross-linkable polyimide to design membrane materials for natural gas purification and CO_2 capture

Youchang Xiao; Tai-Shung Chung

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Grafting thermally labile molecules on cross-linkable polyimide to design membrane materials for natural gas purification and CO_2 capture

机译：在可交联聚酰亚胺上接枝热不稳定分子，以设计用于天然气净化和CO_2捕集的膜材料

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A novel strategy to design molecularly the cavity size and free volume of flexible polyimide materials via thermal treatment of rigid and cross-linkable polyimides grafted with thermal liable side beta-cyclodextrin (CD) molecules is demonstrated in this study. The spaces occupied by the labile groups may become microvoids after low-temperature thermal degradation while the rigid polyimide backbone prevails. The thermal induced cross-linking reaction among polyimide chains may create ultra-fine micro-pores that integrally connect with microvoids. As a result, the thermally cured membranes fabricated from dense polyimide precursors show gas separation performance surpassing the trade-off lines, with tough and flexible mechanical properties. Thermal annealing at 425 ℃ produces polyimide membranes with the best CO_2 permeability of 4016 Barrer with reasonable gas pair selectivity.

机译：在这项研究中，展示了一种通过热处理接枝有热侧链β-环糊精（CD）分子的刚性和可交联聚酰亚胺来分子设计柔性聚酰亚胺材料的空腔尺寸和自由体积的新颖策略。低温热降解后，不稳定基团占据的空间可能会变成微孔，而硬质聚酰亚胺主链占优势。聚酰亚胺链之间的热诱导交联反应可能会产生与微孔整体连接的超细微孔。结果，由致密的聚酰亚胺前体制成的热固化膜显示出超过折衷方案的气体分离性能，具有坚韧而灵活的机械性能。在425℃进行热退火产生的聚酰亚胺膜具有4016 Barrer的最佳CO_2渗透率和合理的气体对选择性。

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《Energy & environmental science》 |2011年第1期|p.201-208|共8页
作者
Youchang Xiao; Tai-Shung Chung;
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Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 117576;

Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 117576;

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1. Modifying the molecular structure and gas separation performance of thermally labile polyimide-based membranes for enhanced natural gas purification [J] . Mei Ling Chua, You Chang Xiao, Tai-Shung Chung Chemical Engineering Science . 2013,第Null期

机译：修改热不稳定的聚酰亚胺基膜的分子结构和气体分离性能，以提高天然气的纯度
2. Cross-Linkable Polyimide Membrane for Natural Gas Purification and Carbon Dioxide Plasticization Reduction [J] . Alexis M.W.Hillock, William J.Koros Macromolecules . 2007,第3期

机译：用于天然气净化和二氧化碳减塑的可交联聚酰亚胺膜
3. Chemically cross-linkable polyimide membranes for improved transport plasticization resistance for natural gas separation [J] . Eguchi Hiroshi, Kim Danny J., Koros William J. Polymer: The International Journal for the Science and Technology of Polymers . 2015,第Null期

机译：化学可交联的聚酰亚胺膜，可改善运输抗塑化性，可用于天然气分离
4. Decarboxylated Crosslinked Polyimide Hollow Fiber Membranes for Natural Gas Purification [C] . Chien-Chiang Chen, W.J. Koros 20th annual meeting of the North American Membrane Society and 11th international conference on inorganic membranes 2010 . 2010

机译：用于天然气净化的脱羧交联聚酰亚胺中空纤维膜
5. Thickness dependent physical aging and supercritical carbon dioxide conditioning effects on crosslinkable polyimide membranes for natural gas purification. [D] . Kratochvil, Adam Michal. 2008

机译：厚度依赖性的物理老化和超临界二氧化碳调节对可交联聚酰亚胺膜的天然气净化作用。
6. Molecular Design and Property Prediction of Sterically Confined Polyimides for Thermally Stable and Transparent Materials [O] . Ki-Ho Nam, Hoi Kil Choi, Hyeonuk Yeo, 2018

机译：热稳定透明材料的空间受限聚酰亚胺的分子设计和性能预测
7. Enhanced CO 2 Capture and Hydrogen Purification by Hydroxy Metal–Organic Framework/Polyimide Mixed Matrix Membranes [O] . Canghai Ma, Jeffrey J. Urban 2019

机译：通过羟基金属 - 有机骨架/聚酰亚胺混合基质膜增强CO 2捕获和氢气净化

Grafting thermally labile molecules on cross-linkable polyimide to design membrane materials for natural gas purification and CO_2 capture

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