PIM-1 as a Solution-Processable 鈥淢olecular Basket鈥?for CO2 Capture from Dilute Sources

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• 作者：Simon H. Pang ; Melinda L. Jue ; Johannes Leisen ; Christopher W. Jones ; Ryan P. Lively
• 刊名：ACS Macro Letters
• 出版年：2015
• 出版时间：December 15, 2015
• 年：2015
• 卷：4
• 期：12
• 页码：1415-1419
• 全文大小：354K
• ISSN：2161-1653

文摘

Rising atmospheric CO₂ levels have triggered recent research into the science of amine materials supported on hard, porous materials such as mesoporous silica or alumina. While such materials can give high CO₂ uptakes and good sorption kinetics, they are difficult to utilize in practical applications due to difficulty in contacting large volumes of CO₂-laden gases with powder materials without significant pressure drops or sorbent attrition. Here, we describe a simple approach based on the impregnation of a permanently microporous polymer, PIM-1, with poly(ethylene imine) (PEI), removing the need for use of the hard oxide. PEI/PIM-1 composites demonstrate comparable performance to more traditionally studied oxide sorbents, with the benefit that PIM-1 is soluble in common solvents, making it eminently more viable for processing into morphologies that can facilitate heat and mass transfer and fabrication into low pressure drop contactors. In addition to adsorption studies performed on a variety of PEI/PIM-1 architectures, spin diffusion NMR studies were performed to suggest that PEI is well-dispersed within the PIM-1, allowing for rapid CO₂ adsorption.