Hypercrosslinked Polymers Incorporated With Imidazolium Salts for Enhancing CO2 Capture
Hypercrosslinked Polymers Incorporated With Imidazolium Salts for Enhancing CO2 Capture
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掺入咪唑鎓盐的超交联聚合物可增强二氧化碳捕获
DOI：
10.1002/pen.24282
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发表时间：
2016
影响因子：
3.2
通讯作者：
Ye Peng
中科院分区：
文献类型：
--
作者：
Hu Lingling;Ni Huagang;Chen Xiaolong;Wang Lele;Wei Ying;Jiang Tengfei;Lu Yaohong;Lu Xiaolin;Ye Peng
以4-乙烯基苄基氯、二乙烯基苯和咪唑离子液体为单体，通过自由基共聚和Friedel-Crafts烷基化反应，制备了咪唑盐掺杂的超高交联聚合物（ILHCPs）。采用FT-IR、固体13 C CP/MAS NMR、TGA和气体吸附等方法对产物的结构进行了表征。与非功能性超高交联聚合物（HCPs）相比，ILHCPs具有优异的CO2吸附性能，但其BET比表面积（447-667 m2/g）和孔容（0.24-0.28 cm 3/g）均小于HCPs。微孔/介孔结构和咪唑盐的协同作用对提高ILHCP对CO2的吸附能力和选择性起着关键作用。结果表明，与孔结构相比，HCPs中咪唑盐的含量对CO2的吸附更为重要。发现咪唑盐基团的最佳摩尔含量为10.5%，最大CO2吸收能力为7.56wt%，最佳CO2吸附选择性（CO2/N2）为47.9/1（273 K，1 bar），而HCP的最佳摩尔含量仅为5.93wt%和27.9/1。这些结果表明，ILHCPs在CO2选择性分离中具有良好的应用前景。 Polym.工程索引，56：573-582，2016.© 2016塑料工程师协会
Hypercrosslinked polymers (ILHCPs) incorporated with imidazolium salts were prepared using 4‐vinylbenzyl chloride, divinylbenzene, and imidazole ionic liquid monomers with various alkyl groups and anions by free radical copolymerization and Friedel‐Crafts alkylation reaction. The structures of ILHCPs were characterized by using FT‐IR, solid state13C CP/MAS NMR spectroscopy, TGA, and gas adsorption. ILHCPs exhibit excellent capability of CO2adsorption compared with that of nonfunctional hypercrosslinked polymers (HCPs), although both the BET surface area (447–667 m2/g) and pore volume (0.24–0.28 cm3/g) of ILHCPs are less than HCPs. The synergistic effect from mirco/mesopore structures and imidazolium salts are proved to play a key role in enhancing the CO2adsorption capability and selectivity over other gases for ILHCPs. It can be found that the imidazolium salts content in HCPs is more important compared with the pore texture for adsorbing CO2. An optimal molar content of imidazolium salts groups is found to be 10.5% with the maximum CO2uptake capability of 7.56 wt% and best CO2adsorption selectivity (CO2/N2) of 47.9/1 (273 K, 1 bar), while those of the HCPs are only 5.93 wt% and 27.9/1. Such results strongly suggest that ILHCPs can be promising applied in selective CO2separation. POLYM. ENG. SCI., 56:573–582, 2016. © 2016 Society of Plastics Engineers