Rong Meng, Yang Liangrong, Wang Li, Yu Jiemiao, Qu Hongnan, Liu Huizhou
CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
J Colloid Interface Sci. 2019 Jul 15;548:265-274. doi: 10.1016/j.jcis.2019.04.036. Epub 2019 Apr 12.
Three triphenylamine-based polyaminal networks (TMPs) with monodispersed ultramicropore (about 0.54 nm) and abundant doped-nitrogen (up to 42.88 wt%) are successfully prepared through the direct polycondensation of triphenylamine-based aldehydes with melamine. The synergistic effects of uniform ultramicropore and rich CO-philic polar sites endow TMPs with exceptional CO sorption capacity and selectivity over N and CH. For example, the CO uptakes of TMPs can reach 15.7 wt% (273 K) and 11.2 wt% (298 K) at 1 bar. Especially, at a low pressure of 0.15 bar, TMP-3 simultaneously exhibits excellent CO sorption capacity of 4.16 wt% (∼1 mmol g, 298 K), high adsorption selectivities of CO/N (61.9, 298 K) and CO/CH (7.8, 298 K) and good cycle reusability, which are superior to most of the microporous polymers. In addition, the porous properties of TMPs could be effectively tuned by varying the amount of substitution formyl. This facile preparation method and excellent CO adsorption properties enable TMPs to possess promising application potential in CO capture and separation from low-concentration gas mixtures.
通过三苯胺基醛与三聚氰胺的直接缩聚反应，成功制备了三种具有单分散超微孔（约0.54 nm）和大量掺杂氮（高达42.88 wt%）的三苯胺基聚胺网络（TMPs）。均匀的超微孔和丰富的亲CO极性位点的协同作用赋予了TMPs优异的CO吸附容量以及对N和CH的选择性。例如，TMPs在1 bar下的CO吸附量在273 K时可达15.7 wt%，在298 K时可达11.2 wt%。特别是，在0.15 bar的低压下，TMP-3同时表现出4.16 wt%（~1 mmol g，298 K）的优异CO吸附容量、CO/N（61.9，298 K）和CO/CH（7.8，298 K）的高吸附选择性以及良好的循环可重复使用性，这些性能优于大多数微孔聚合物。此外，通过改变取代甲酰基的量，可以有效地调节TMPs的多孔性质。这种简便的制备方法和优异的CO吸附性能使TMPs在从低浓度气体混合物中捕获和分离CO方面具有广阔的应用潜力。
