Microporous Functionalized Triazine-Based Polyimides with High CO2 Capture Capacity
Microporous Functionalized Triazine-Based Polyimides with High CO2 Capture Capacity
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DOI：
10.1021/cm4000894
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发表时间：
2013-03-26
影响因子：
8.6
通讯作者：
Senker, Juergen
中科院分区：
文献类型：
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作者：
Liebl, Mario R.;Senker, Juergen
具有极性表面的多孔有机聚合物是一种很有前途的二氧化碳捕集和储存材料。在这里，我们提出了七个三嗪基多孔聚酰亚胺（TPI）聚合物网络的合成和表征，并评估其作为CO2吸附剂材料的适用性。通过2，4，6-三（4-氨基苯基）-1，3，5-三嗪（TAPT）与相应的二酐结构单元在间甲酚中的缩合反应以良好的产率合成了TPI。所得到的TPI聚合物网络在空气中（高达450摄氏度）表现出高的化学和热稳定性。氩吸附等温线表明，比BET当量表面积达到809 m2 g-1（TPI-1）。孔结构的表征显示主要是微孔，孔径范围从0.4到3 nm。在273 K和1 bar下，观察到TPI-1和TPI-2对CO2的最高吸收值（2.45 mmol g（-1））。TPI-7在298 K时对CO2的结合选择性最高（56），高于N-2。高官能化程度导致TPI聚合物网络在29 kJ mol（-1）（TPI-6）和34 kJ mol（-1）（TPI-1）之间具有相对较高的CO2吸附热。因此，TPI网络显示出相对于其中等BET当量表面积的高CO2吸收。结合一个简单的模块化合成程序，高的化学和热稳定性，以及可调的CO2/N-2结合选择性，TPI可能被归类为有前途的材料，用于CO2储存和分离应用。
Porous organic polymers with polar surfaces are promising materials for capture and storage applications for carbon dioxide. Here, we present the synthesis and characterization of seven triazine-based porous polyimide (TPI) polymer networks and evaluate their applicability as CO2 sorbent materials. The TPIs were synthesized in good yields by a condensation reaction of 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TAPT) and the respective dianhydride building blocks in m-cresol. The resulting TPI polymer networks exhibited high chemical and thermal stability under air (up to 450 degrees C). Argon sorption isotherms demonstrated that specific BET equivalent surface areas up to 809 m(2) g(-1) (TPI-1) were reached. The characterization of the pore structure revealed mainly micropores with pore diameters ranging from 0.4 to 3 nm. The highest uptake values for CO2 (2.45 mmol g(-1)) were observed for TPI-1 and TPI-2 at 273 K and 1 bar. The highest binding selectivity (56) for CO2 over N-2 at 298 K was observed for TPI-7. The high degree of functionalization led to comparatively high CO2 adsorption heats for TPI polymer networks between 29 kJ mol(-1) (TPI-6) and 34 kJ mol(-1) (TPI-1). As a result, the TPI networks showed high CO2 uptakes relative to their moderate BET equivalent surface areas. In combination with a facile modular synthesis procedure, a high chemical and thermal stability, and the tunability of the CO2/N-2 binding selectivities, TPIs might be classified as promising materials for CO2 storage and separation applications.