Industrial Chemistry and Environmental Engineering Faculty, Politehnica University Timișoara, 6 Vasile Parvan Blv., 300223 Timisoara, Romania.
"Coriolan Drăgulescu" Institute of Chemistry, 24 Mihai Viteazul Blv., 300223 Timisoara, Romania.
Molecules. 2022 Apr 30;27(9):2894. doi: 10.3390/molecules27092894.
In this paper, we present the synthesis of new polymeric adsorbents derived from macroporous chloromethylated styrene-divinylbenzene (DVB) copolymers with different cross-linking degrees functionalized with the following aminobenzoic groups: styrene-6.7% DVB (PAB1), styrene-10% DVB (PAB2), and styrene-15% DVB (PAB3). The new polymeric products, PAB1, PAB2, and PAB3, were characterized by FTIR spectroscopy, thermogravimetric analysis, and EDX, SEM, and BET analysis, respectively. The evolution of the functionalization reaction was followed by FTIR spectroscopy, which revealed a decrease in the intensity of the γCHCl band at 1260 cm, and, simultaneously, the appearance of C=O carboxylic bands from 1685-1695 cm and at 1748 cm. The thermal stability increased with the increase in the cross-linking degree. The data obtained from the EDX analysis of the novel cross-linked copolymers confirmed the functionalization with aminobenzoic groups through the presence and content of nitrogen, as follows: PAB1: N% = 0.47; PAB2: N% = 0.85; and PAB3: N% = 1.30. The adsorption performances of the novel polymeric adsorbents, PAB1, PAB2, and PAB3, were tested in the adsorption of three antibiotics, tetracycline, sulfamethoxazole, and amoxicillin, from aqueous solutions, by using extensive kinetic, equilibrium, and thermodynamic studies. The best adsorption capacity was demonstrated by the tetracycline. Amoxicillin adsorption was also attempted, but it did not show positive results.
在本文中，我们介绍了新的聚合物吸附剂的合成，这些吸附剂是由不同交联度的大孔氯甲基化苯乙烯-二乙烯基苯（DVB）共聚物与以下氨基苯甲酸基团功能化得到的：苯乙烯-6.7% DVB（PAB1）、苯乙烯-10% DVB（PAB2）和苯乙烯-15% DVB（PAB3）。新的聚合物产物 PAB1、PAB2 和 PAB3 分别通过傅里叶变换红外光谱、热重分析和 EDX、SEM 和 BET 分析进行了表征。通过傅里叶变换红外光谱跟踪了功能化反应的演变，结果表明在 1260 cm 处的 γCHCl 带的强度降低，同时在 1685-1695 cm 和 1748 cm 处出现了 C=O 羧酸带。随着交联度的增加，热稳定性增加。通过对新型交联共聚物的 EDX 分析获得的数据证实了通过存在和氮的含量进行氨基苯甲酸基团的功能化，如下所示：PAB1：N%=0.47；PAB2：N%=0.85；PAB3：N%=1.30。通过广泛的动力学、平衡和热力学研究，测试了新型聚合物吸附剂 PAB1、PAB2 和 PAB3 对三种抗生素（四环素、磺胺甲恶唑和阿莫西林）从水溶液中的吸附性能。四环素表现出最佳的吸附能力。阿莫西林的吸附也尝试过，但没有得到积极的结果。
