Preparation process of ILs (at) CTF composite material and catalytic performance of carbon dioxide cycloaddition reaction

The invention discloses a preparation process of a functionally modified CTF-based composite material. According to the preparation process, functional ionic liquid (ILs) containing a hydrogen bond donor is grafted to a two-dimensional imino triazine COF (CTF) material with a stable structure. A series of X% ILs (at) CTF (X = 0, 25, 50, 75 and 100) are prepared by taking an alkyl chain as a bridging group, and X represents the molar ratio of an organic ligand 1 (hydroxyl-containing terephthalaldehyde) to terephthalaldehyde. Cyclization of epichlorohydrin and CO2 is taken as a model reaction, and the influence of parameters such as ionic liquid, grafting amount, reaction temperature and reaction pressure on catalytic activity is investigated; catalytic activity results show that 1-methylimidazole is used as the ionic liquid, the 50% ILs (at) CTF composite material has excellent catalytic performance, the conversion rate of epoxy chloropropane at 100 DEG C under the CO2 pressure of 1 MPa is as high as 98%, and