可调谐合成极性改性超交联树脂及其在吸附中的应用。
Tunable synthesis of the polar modified hyper-cross-linked resins and application to the adsorption.
机构信息
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
出版信息
J Colloid Interface Sci. 2017 Nov 1;505:383-391. doi: 10.1016/j.jcis.2017.06.030. Epub 2017 Jun 9.
The polar modified hyper-cross-linked resins were synthesized by the suspension polymerization and Friedel-Crafts alkylation reaction, and the effect of the feeding amount of the monomers (N-vinylimidazole and p-vinylbenzyl chloride) on the porosity and polarity were clarified. As the feeding amount of p-vinylbenzyl chloride decreased from 75% to 50% (w/w), the Brunauer-Emmett-Teller surface area of the resins lowered from 1306 to 436 m/g, and the pore size distribution showed a large population of pores in micropores stretching to a higher percentage of mesopores. As the feeding amount of N-vinylimidazole increased from 5% to 30% (w/w), the nitrogen content of the resins rose from 0.005% to 3.06% (w/w), and the contact angle decreased from 97±4.2° to 28±2.0°. As a result, the porosity and polarity of the resins could be accurately tuned by adjusting the feeding amount of the monomers, and the different porosity and polarity of these resins endowed them with selective adsorption to benzoic acid and Rhodamine B.
通过悬浮聚合和傅克烷基化反应合成了极性修饰的超交联树脂，并阐明了单体（N-乙烯基咪唑和对乙烯基苄基氯）的进料量对孔隙率和极性的影响。随着对乙烯基苄基氯的进料量从 75%（w/w）降至 50%（w/w），树脂的 Brunauer-Emmett-Teller 比表面积从 1306 降至 436 m/g，孔径分布显示出微孔中大量的孔向更高比例的中孔扩展。随着 N-乙烯基咪唑的进料量从 5%（w/w）增加到 30%（w/w），树脂的氮含量从 0.005%（w/w）增加到 3.06%（w/w），接触角从 97±4.2°降低到 28±2.0°。结果表明，通过调整单体的进料量可以精确调节树脂的孔隙率和极性，这些树脂的不同孔隙率和极性使它们对苯甲酸和罗丹明 B 具有选择性吸附。
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