超交联多孔材料的制备及其对色氨酸的吸附行为. (Chinese)

Preparation of Hypercrosslinked Porous Materials and Its Adsorption Behavior for Tryptophan. (English)

A series of hypercrosslinked porous polymer materials with high specific surface area (HCP-PhH-3, HCP-PhH2-3, HCP-PhH3-3) for tryptophan adsorption were synthesized by Friedel-Crafts alkylation reaction with benzene, biphenyl and 1,3,5-triphenylbenzene as the reaction monomer, dimethoxymethane as the crosslinking agent and 1,2-dichloroethane as the reaction solvent. The structure of the hypercrosslinked porous polymer materials were characterized by nitrogen adsorption and desorption analyses, thermal weight loss and infrared spectroscopy. The BET results showed that the hypercrosslinked porous polymer materials exhibited extremely rich steric pore size structure, such as the specific surface area of HCP-PhH-3 up to 901.50 m²/g, and thermogravimetric analysis of these cross-linked polymers showed that they exhibited good thermal stability. The adsorption behavior of HCP-PhH-3, HCP-PhH2-3 and HCP-PhH3-3 on tryptophan were studied by adsorption method. The experimental results showed that the order of adsorption amount of tryptophan was as follows: HCP-PhH-3 > HCP-PhH2-3 > HCP-PhH3-3. The polymer material synthesized with benzene as monomer showed the greatest adsorption capacity for tryptophan. After immersion in five different acidic and alkaline solvents, the polymers still showed good adsorption of tryptophan, indicating that the hypercrosslinked porous polymer materials had excellent performance in carrying out adsorption processes in different environments. The kinetic fitting and thermodynamic fitting of tryptophan adsorption by HCP-PhH2-3 and HCP-PhH3-3 showed that the adsorption of tryptophan by the polymers were heat-absorbing process and chemical reaction rate-controlled multilayer adsorption process. Finally, the possible relationship between the structures of HCP prepared with different monomers and the adsorption capacity of tryptophan were also explored. This class of hypercrosslinked porous polymer materials offered new options for material applications in the field of amino acid adsorption and separation due to their simple synthesis process and excellent stability and relatively good tryptophan adsorption capacity. [ABSTRACT FROM AUTHOR]

分别以苯、联苯和 1,3,5-三苯基苯为反应单体, 二甲氧基甲烷 (FDA) 为交联剂, 1,2-二氯 乙烷为反应溶剂, 通过 Friedel-Crafts 烷基化反应, 合成了一系列比表面积大的多孔芳香交联聚 合物 (HCP-PhH-3、HCP-PhH2-3、HCP-PhH3-3) 。通过氮气吸脱附分析、热失重和红外光谱对交 联聚合物的结构进行表征。结果表明, 聚合物的孔结构丰富, HCP-PhH-3 的比表面积可达 901.50 m²/g, 另外该类聚合物表现出良好的热稳定性和化学稳定性。对色氨酸的吸附研究表明, 三种聚合物吸附色氨酸的吸附量顺序为 HCP-PhH-3 > HCP-PhH2-3 > HCP-PhH3-3。经过多种 溶剂的浸泡后, 该类聚合物对色氨酸都表现出较好的吸附效果。HCP-PhH2-3 和 HCP-PhH3-3 吸 附色氨酸的动力学和热力学拟合曲线表明, 该吸附过程属于化学反应速率控制的多层吸附过程。 [ABSTRACT FROM AUTHOR]

Copyright of Journal of Functional Polymers is the property of Journal of Functional Polymers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)