Phenanthroimidazole triazine polymer as well as preparation method and application thereof

Abstract

The invention discloses a phenanthroimidazole triazine polymer and a preparation method thereof. The method comprises the following steps: performing bromination on 9,10-phenanthrenequinone, performing carbonyl protection, performing a substitution reaction on the product and a cyanate, performing oxidization to form 3,6-dicyano-9,10-phenanthrenequinone, performing ring formation on the 3,6-dicyano-9,10-phenanthrenequinone and 4-cyanobenzaldehyde to obtain 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthro[9,10-d]imidazole (CDPI), and finally performing a ZnCl2 ion thermal polymerization reaction byusing the 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthro[9,10-d]imidazole as a building block to obtain the phenanthroimidazole triazine polymer. The phenanthroimidazole triazine polymer provided by theinvention has the advantages of a high specific surface area, an abundant pore structure and good heat stability, is simple to prepare and low in cost, and has excellent CO2 adsorption performance under the temperature condition of 273K.

Description

technical field [0001] The invention relates to a triazine polymer, in particular to a phenanthroimidazolyl triazine polymer used for gas adsorption and a preparation method thereof, belonging to the field of gas adsorbents. Background technique [0002] As we all know, the massive emission of carbon dioxide is an important cause of the earth's greenhouse effect, so carbon dioxide is also called a greenhouse gas. Given the increasing demand for fossil fuels, it is not practical to limit CO2 emissions. However, we can absorb carbon dioxide during the emission process and further use the absorbed carbon dioxide for industrial raw material production, such as reducing carbon dioxide to methanol. [0003] Carbon dioxide capture technologies mainly include liquid amine absorption, membrane separation and adsorption methods. At present, liquid amine solution is mainly used to absorb carbon dioxide. This method has high adsorption capacity, good selectivity, and high efficiency, ...

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Problems solved by technology

[0005] After a lot of research, there are still some problems in the research field of carbon dioxide adsorption by solid adsorbents: At present, the use of polyamine-based amination reagents and increasing the specific surface area of ​​the carrier can properly improve the adsorption capacity of carbon dioxide, but the effect of improvement is still not enough. Further improvement is needed; secondly, in the process of carbon dioxide adsorption by solid adsorbents, the diffusion of carbon dioxide in the carrier pores is generally hindered, which reduces the adsorption capacity of adsorbents for carbon dioxide; moreover, the existing solid adsorbents generally have heat resistance Poor, not enough to meet the use requirements under specific conditions (such as high temperature flue gas), which limits its application space

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