Synthesis and CO₂ Capture Behavior of Porous Cross-Linked Polymers Containing Pendant Triazole Groups

Porous cross-linked polymers containing pendant triazole groups were synthesized from glycidyl methacrylate (GMA) in the presence of divinylbenzene via high internal phase emulsion (HIPE) templating method followed by functionalization with sodium 3-amino-1,2,4-triazole (ATANa). They were characterized with FTIR, SEM, BET, and mercury intrusion and assessed as CO₂ adsorbents. With interconnected hierarchical porous structure and abundant triazole groups which absorbed CO₂ chemically in 1:1 stoichiometry, the adsorbents exhibited high CO₂ adsorption capacity (3.6 mmol g^–1, at 25 °C and 1 atm) and rate, and good CO₂/N₂ selectivity (∼30). The adsorbents also displayed easy CO₂ desorption with medium desorption heat (58 kJ/mol CO₂), acceptable moisture endurance, and excellent recyclability. The results suggest that these functionalized porous polymers are potential adsorbents for CO₂ capture.