Abstract In this paper, a porous covalent triazine based framework (CTF) was prepared from cyanuric chloride and 1,4-Phenylenediamine via catalyst-free condensation polymerization. The CTF was post-synthetically functionalized (CTF-NH) with monoethanolamine (MEA). The structural and texture properties were investigated by solubility, FESEM, EDX, Mapping, FTIR, PXRD, TGA/DTG, BET analysis, water and chemical stability, and selective CO2/CH4 adsorption behavior. The results showed the surface area loss from 20.6118 m2/g to 18.0647 m2/g due to modification resulting in CO2 uptake capacity enhancement of 41.9% and also improvement in the CO2/CH4 selectivity. The polymers were found to be amorphous and highly thermally stable. Furthermore, the insoluble nature of both polymer in common solvents dictates their robust nature, highly hygroscopic and found highly stable acid and base over one week while sustaining surface area and adsorption capacity. The results present in this work indicate the significance of microporous COPs with amine-functionalized pores towards the selective CO2/CH4 separation.

中文翻译：

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胺官能度对多孔共价三嗪吸附剂选择性 CO2/CH4 吸附行为的影响。

摘要 本文以氰尿酰氯和1,4-苯二胺为原料，通过无催化剂缩聚反应制备了多孔共价三嗪基骨架（CTF）。用单乙醇胺 (MEA) 对 CTF 进行合成后功能化 (CTF-NH)。通过溶解度、FESEM、EDX、映射、FTIR、PXRD、TGA/DTG、BET 分析、水和化学稳定性以及选择性 CO2/CH4 吸附行为研究了结构和质地特性。结果表明，由于改性导致 CO2 吸收能力提高 41.9% 和 CO2/CH4 选择性提高，表面积损失从 20.6118 m2/g 到 18.0647 m2/g。发现聚合物是无定形的并且高度热稳定。此外，两种聚合物在普通溶剂中的不溶性决定了它们的坚固性，高度吸湿，并在一周内发现高度稳定的酸和碱，同时保持表面积和吸附能力。这项工作中的结果表明具有胺官能化孔的微孔 COP 对选择性 CO2/CH4 分离的重要性。