Molecular template-directed synthesis of microporous polymer networks for highly selective CO2 capture.
Molecular template-directed synthesis of microporous polymer networks for highly selective CO2 capture.
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DOI：
10.1021/am505851u
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发表时间：
2014-11
影响因子：
9.5
通讯作者：
Yao Shi;Jing Zhu;Xiao-Qin Liu;Jiangli Geng;Linbing Sun
中科院分区：
文献类型：
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作者：
Yao Shi;Jing Zhu;Xiao-Qin Liu;Jiangli Geng;Linbing Sun
多孔聚合物网络在包括碳捕获在内的各种应用中具有巨大的潜力。然而，复杂的单体和/或昂贵的催化剂通常用于它们的合成，这使得该方法复杂、昂贵且难以放大。在此，我们开发了一种分子模板策略，通过两种低成本单体（即，氯甲基苯和乙二胺）。聚合反应可以在温和条件下在不存在任何催化剂的情况下进行。所得材料与仲胺相互连接，并由于溶剂分子的结构导向作用而显示出明确的微孔。这些特性使我们的材料能够高效地选择性捕获CO2，并获得异常高的CO2/N2和CO2/CH 4选择性。此外，吸附剂可以在温和的条件下完全再生。我们的材料可能为从烟道气和天然气等混合物中选择性捕获CO2提供有前途的候选材料。
Porous polymer networks have great potential in various applications including carbon capture. However, complex monomers and/or expensive catalysts are commonly used for their synthesis, which makes the process complicated, costly, and hard to scale up. Herein, we develop a molecular template strategy to fabricate new porous polymer networks by a simple nucleophilic substitution reaction of two low-cost monomers (i.e., chloromethylbenzene and ethylene diamine). The polymerization reactions can take place under mild conditions in the absence of any catalysts. The resultant materials are interconnected with secondary amines and show well-defined micropores due to the structure-directing role of solvent molecules. These properties make our materials highly efficient for selective CO2 capture, and unusually high CO2/N2 and CO2/CH4 selectivities are obtained. Furthermore, the adsorbents can be completely regenerated under mild conditions. Our materials may provide promising candidates for selective capture of CO2 from mixtures such as flue gas and natural gas.