差示扫描量热法
共晶体系
单体
离子液体
热重分析
化学工程
聚合物
材料科学
吸附剂
高分子化学
有机化学
化学
合金
催化作用
吸附
工程类
物理
热力学
作者
Mehmet Işık,Sonia Zulfiqar,Fatimah Edhaim,Fernando Ruipérez,Alexander Rothenberger,David Mecerreyes
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2016-10-18
卷期号:4 (12): 7200-7208
被引量:66
标识
DOI:10.1021/acssuschemeng.6b02137
摘要
The design of high performance solid sorbent materials for CO2 capture is a technology which has been employed to mitigate global warming. However, the covalent incorporation of functionalities into polymeric supports usually involves multistep energy-intensive chemical processes. This fact makes the net CO2 balance of the materials negative even though they possess good properties as CO2 sorbents. Here we show a new family of polymers which are based on amines, amidoximes, and natural carboxylic acids and can be obtained using sustainable low energy processes. Thus, deep eutectic monomers based on natural carboxylic acids, amidoximes, and amines have been prepared by just mixing with cholinium type methacrylic ammonium monomer. The formation of deep eutectic monomers was confirmed by differential scanning calorimetry measurements. In all cases, the monomers displayed glass transition temperatures well below room temperature. Computational studies revealed that the formation of eutectic complexes lengthens the distance between the cation and the anion causing charge delocalization. The liquid nature of the resulting deep eutectic monomers (DEMs) made it possible to conduct a fast photopolymerization process to obtain the corresponding poly(ionic liquids). Materials were characterized by means of nuclear magnetic resonance, differential scanning calorimetry, thermogravimetric analysis, and X-ray diffraction to evaluate the properties of the polymers. The polymers were then used as solid sorbents for CO2 capture. It has been shown that the polymers prepared with citric acid displayed better performance both experimentally and computationally. The current endeavor showed that sustainable poly(ionic liquids) based on deep eutectic monomers can be easily prepared to produce low-energy-cost alternatives to the materials currently being researched for CO2 capture.
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