通过自由基聚合反应合成淀粉接枝聚甲基丙烯酸甲酯及其对亚甲基蓝的吸附性能。

Synthesis of Starch-Grafted Polymethyl Methacrylate via Free Radical Polymerization Reaction and Its Application for the Uptake of Methylene Blue.

机构信息

Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan.

Department of Horticulture, Faculty of Agriculture, Gomal University, Dera Ismail Khan 29050, Pakistan.

出版信息

Molecules. 2022 Sep 9;27(18):5844. doi: 10.3390/molecules27185844.

DOI:10.3390/molecules27185844

PMID:36144579

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9503754/

Abstract

In this research, a new biodegradable and eco-friendly adsorbent, starch-grafted polymethyl methacrylate (St-g-PMMA) was synthesized. The St-g-PMMA was synthesized by a free radical polymerization reaction in which methyl methacrylate (MMA) was grafted onto a starch polymer chain. The reaction was performed in water in the presence of a potassium persulfate (KPS) initiator. The structure and different properties of the St-g-PMMA was explored by FT-IR, 1H NMR, TGA, SEM and XRD. After characterization, the St-g-PMMA was used for the removal of MB dye. Different adsorption parameters, such as effect of adsorbent dose, effect of pH, effect of initial concentration of dye solution, effect of contact time and comparative adsorption study were investigated. The St-g-PMMA showed a maximum removal percentage (R%) of 97% towards MB. The other parameters, such as the isothermal and kinetic models, were fitted to the experimental data. The results showed that the Langmuir adsorption and pseudo second order kinetic models were best fitted to experimental data with a regression coefficient of R = 0.93 and 0.99, respectively.

摘要

在这项研究中，合成了一种新型的可生物降解和环保的吸附剂，淀粉接枝聚甲基丙烯酸甲酯（St-g-PMMA）。St-g-PMMA 通过自由基聚合反应合成，其中甲基丙烯酸甲酯（MMA）接枝到淀粉聚合物链上。反应在水中进行，使用过硫酸钾（KPS）引发剂。通过傅里叶变换红外光谱（FT-IR）、1H 核磁共振（1H NMR）、热重分析（TGA）、扫描电子显微镜（SEM）和 X 射线衍射（XRD）等方法对 St-g-PMMA 的结构和不同性质进行了研究。表征后，将 St-g-PMMA 用于去除 MB 染料。研究了不同的吸附参数，如吸附剂剂量的影响、pH 值的影响、染料溶液初始浓度的影响、接触时间的影响和比较吸附研究。St-g-PMMA 对 MB 的去除率最高可达 97%。其他参数，如等温线和动力学模型，也对实验数据进行了拟合。结果表明，Langmuir 吸附和准二级动力学模型最能拟合实验数据，回归系数 R 分别为 0.93 和 0.99。