Preparation And Adsorption Properties Of Amine-modified Conjugated Porous Organic Polymer

Organic porous material is a kind of material that is connected by covalent bond between small organic molecules. It attracted much attention from the scientists in material, gas separation and storage, heterogeneous catalysis due to its high chemical and thermal stability, low skeletal density, narrow pore size distribution, and high surface area, etc.The first chapter of paper presents the four classical organic porous materials:super cross-linked polymer, inherent microporous polymers, covalent organic frameworks, and conjugated organic polymers, as well as their applications in heterogeneous catalysis, materials, gas storage.The second chapter of the paper describes the usage of 2,5-dibromoaniline,1,3,5-triethynylbenzene and tetrakis(4-ethynylphenyl)methane to synthesize the conjugated organic polymer CMP-22 and CMP-32, which were characterized by IR, TGA, PXRD, SEM. And the nitrogen, carbon dioxide adsorption and the aspect of adsorption pesticide were determined. Their Brunauer-Emmett-Teller specific surface area are 153 m2·g-1 and 523 m2·g-1 according to their nitrogen adsorption-desorption isotherms, respectively. The maximum adsorption capacity of carbon dioxide for CMP-32 is larger than that of CMP-22. The adsorption experiments of six different pesticides including carbofuran, carbaryl, pirimicarb, bisphenol A,2,4-dichlorophenol, triclosan were carried using CMP-32. The result demonstrates that the adsorption effect of 2,4-dichlorophenol and triclosan are the most; especially for triclosan, the adsorption effect is up to 95.5%.The third chapter of the paper describes the usage of 4,7-dibromo-lH-benzo[d] imidazole, tetrakis(4-ethynylphenyl)methane and 1,3,5-triethynylbenzene to obtain the conjugated organic polymer CMP-31 and CMP-21 which are characterized with IR, TGA, PXRD and SEM. And the nitrogen, carbon dioxide, hydrogen and methane adsorption, as well as the pesticide adsorption experiments are determined. The Brunauer-Emmett-Teller specific surface area are 435.7 m2·g-1 and 648.2 m2·g-1 according to their nitrogen adsorption-desorption isotherms, respectively. In lbar,77 K conditions, the maximum amount of adsorption of hydrogen for CMP-21 and CMP-31 are 75.97 cm3·g-1 (0.67 wt %) and 109.78 cm3·g-1(0.97 wt%), respectively. The value of the hydrogen adsorption enthalpy Qst are 8.06 kJ·mol-1 and 7.83 kJ·mol-1 at 77 K respectively. The large hydrogen adsorption enthalpies indicate that they have large interactions between hydrogen, so that they can be considered as a potential storage material for hydrogen. The different pesticide adsorption experiments are done using CMP-21. The results show that the removal rates of bisphenol A and triclosan are 73% and 98.1%, respectively. While for CMP-31, the removal rates of 2,4-dichlorophenol, bisphenol A and triclosan are 74.6%,89% and 98.7%, respectively.