Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nam. 2, 162 06 Prague, 6, Czech Republic.
Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nam. 2, 162 06 Prague, 6, Czech Republic.
Int J Biol Macromol. 2024 Feb;259(Pt 1):129727. doi: 10.1016/j.ijbiomac.2024.129727. Epub 2024 Jan 23.
This work reports the synthesis of poly (itaconic acid) by thermal polymerization mediated by 2,2'-Azobis(2-methylpropionamidine) dihydrochloride. Furthermore, physical hydrogels were prepared by using high molecular weight poly (itaconic acid) characterized by low dispersity and laponite RD. The hydrogels presented porous 3D network structures, with a high-water penetration of almost 2000 g/g of swelling ratio, which can allow the adsorption sites of both poly (itaconic acid) and laponite RD to be easily exposed and facilitate the adsorption of dyes. The water adsorption followed Schott's pseudo-second-order model. The mechanism of the adsorption process was investigated using H and P NMR. The hydrogel is able to fast adsorb by a combination of electrostatic interactions and hydrogen bonding by the synergic effect of the clay and poly (itaconic acid). Moreover, the prepared aerogels exhibited a fast removal of Basic Fuchsin, with an adsorption capacity of 67.56 mg/g and a high removal efficiency (~99 %). The adsorption followed the pseudo-second-order kinetic model and Langmuir isotherm model. Furthermore, the thermodynamic parameters showed that the BF process of adsorption was spontaneous and feasible, endothermic, and followed physisorption. These results indicated that the PIA/laponite-based aerogel can be considered a promising adsorbent material in textile wastewater treatment.
本文报道了通过 2,2'-偶氮双（2-甲基丙脒）二盐酸盐热聚合合成聚（衣康酸）。此外，还通过使用具有低分散性和拉蓬土 RD 的高分子量聚（衣康酸）制备了物理水凝胶。水凝胶呈现出多孔的 3D 网络结构，具有几乎 2000 g/g 的高吸水率和高膨胀比，这使得聚（衣康酸）和拉蓬土 RD 的吸附位点能够轻易暴露出来，并促进了染料的吸附。水吸附符合 Schott 伪二级模型。使用 H 和 P NMR 研究了吸附过程的机理。水凝胶通过粘土和聚（衣康酸）的协同作用，通过静电相互作用和氢键快速吸附。此外，所制备的气凝胶对碱性品红具有快速去除能力，吸附容量为 67.56 mg/g，去除效率高（约 99%）。吸附遵循伪二级动力学模型和朗缪尔等温线模型。此外，热力学参数表明，吸附 BF 过程是自发和可行的，是吸热的，并且遵循物理吸附。这些结果表明，基于 PIA/拉蓬土的气凝胶可以被认为是一种有前途的纺织废水处理吸附材料。
