Liu Yuhua, Wei Hongliang, Li Songmao, Wang Gang, Guo Tao, Han Huayun
School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China.
School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, PR China.
Int J Biol Macromol. 2022 May 15;207:622-634. doi: 10.1016/j.ijbiomac.2022.03.032. Epub 2022 Mar 10.
Clean and safe water resources play a key role in environmental safety and human health. Recently, hydrogels have attracted extensive attention due to their non-toxicity, controllable performance, and high adsorption. Herein, a semi- interpenetrating network hydrogel (semi-IPN-Gel) adsorbent based on quaternary cellulose (QC) was prepared by the amino-anhydride click reaction between maleic anhydride copolymer and polyacrylamine hydrochloride (PAH), and its adsorption properties for Eosin Y were studied. First, a binary copolymer (PAM) of acrylamide and maleic anhydride was synthesized by free radical polymerization. Then, the PAM, QC and PAH were dissolved in water, and the pH of the solution was adjusted to alkaline. Semi-IPN-Gel was successfully prepared by fast anhydride-amino click reaction. The preparation conditions of hydrogels were optimized by single-factor experiments. Finally, taking Eosin Y as a model pollutant, the adsorption performance of Eosin Y was studied. The factors influencing the adsorption capacity of the absorbents such as initial concentration of the Eosin Y, temperature, the amount of absorbent, ionic strength and pH of the Eosin Y solutions were investigated. And adsorption data were analyzed via the kinetic model and the isothermal model, indicating that the adsorption process of the hydrogel is a single layer chemisorption process.
清洁安全的水资源在环境安全和人类健康方面发挥着关键作用。近年来，水凝胶因其无毒、性能可控和高吸附性而备受关注。在此，通过马来酸酐共聚物与聚丙烯胺盐酸盐（PAH）之间的氨基-酸酐点击反应制备了一种基于季铵化纤维素（QC）的半互穿网络水凝胶（semi-IPN-Gel）吸附剂，并研究了其对曙红Y的吸附性能。首先，通过自由基聚合合成了丙烯酰胺与马来酸酐的二元共聚物（PAM）。然后，将PAM、QC和PAH溶解于水中，并将溶液的pH值调至碱性。通过快速的酸酐-氨基点击反应成功制备了semi-IPN-Gel。通过单因素实验优化了水凝胶的制备条件。最后，以曙红Y作为模型污染物，研究了其吸附性能。考察了曙红Y初始浓度、温度、吸附剂用量、离子强度和曙红Y溶液pH值等因素对吸附剂吸附容量的影响。并通过动力学模型和等温模型对吸附数据进行分析，结果表明水凝胶的吸附过程为单层化学吸附过程。
