Directional porous polyimide/polyethylene glycol composite aerogel with enhanced CO2 uptake performance

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2022-10-26 DOI:10.1177/09540083221136051

Yihao Nie, Xibin Yi, Xinfu Zhao, Shimo Yu, Jing Zhang, Xiaochan Liu, Sijia Liu, Z. Yuan, Minna Zhang

引用次数: 1

Abstract

The cost of CO2 separation and energy consumption can be decreased through the use of CO2 adsorption. Due to the electron-rich heteroatoms in its network, polyimide (PI) has a remarkable affinity for CO2. Polyethylene glycol (PEG) can increase the layer spacing of polymers, so as to change the mass transfer of CO2 in it. Furthermore, the ether bond (-O-) in PEG has good affinity for CO2. In this study, PEG-1000 was introduced into PI aerogel by mild sol-gel method at low temperature, and freeze-drying was used to produce PI/PEG composite aerogels with directional pore structure. The effect of PEG-1000 content and directional pore structure of the PI/PEG composite aerogels on CO2 adsorption performance were further studied. The L-PI/PEG-4 composite aerogel, which contains 4 g PEG and is directionally frozen in liquid nitrogen, has a CO2 adsorption capacity of 16.76 cm3/g at 25°C and 1 bar. L-PI/PEG-4 aerogel also exhibits high CO2/N2 selectivity and adsorption cycle stability.

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具有增强CO2吸收性能的定向多孔聚酰亚胺/聚乙二醇复合气凝胶

通过使用CO2吸附可以降低CO2分离的成本和能耗。聚酰亚胺（PI）由于其网络中的富电子杂原子，对CO2具有显著的亲和力。聚乙二醇（PEG）可以增加聚合物的层间距，从而改变其中CO2的传质。此外，PEG中的醚键（-O-）对CO2具有良好的亲和力。本研究采用温和的溶胶-凝胶法在低温下将PEG-1000引入PI气凝胶中，并利用冷冻干燥制备具有定向孔结构的PI/PEG复合气凝胶。进一步研究了PEG-1000含量和PI/PEG复合气凝胶定向孔结构对CO2吸附性能的影响。L-PI/PEG-4复合气凝胶含有4 g PEG，并在液氮中定向冷冻，在25°C和1巴下具有16.76 cm3/g的CO2吸附能力。L-PI/PEG-4气凝胶还表现出高的CO2/N2选择性和吸附循环稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.