Advanced Polymer Laboratory, Department of Polymer Science and Technology, Government College of Engineering and Leather Technology (Post-Graduate), Maulana Abul Kalam Azad University of Technology, Salt Lake, Kolkata 700106, West Bengal, India.
Department of Leather Technology, Government College of Engineering and Leather Technology (Post-Graduate), Maulana Abul Kalam Azad University of Technology, Salt Lake, Kolkata 700106, West Bengal, India.
Carbohydr Polym. 2019 Feb 15;206:778-791. doi: 10.1016/j.carbpol.2018.11.032. Epub 2018 Nov 13.
Pectin (PC)-g-[methacrylic acid (MAA)-co-3-(N-isopropylacrylamido)-2-methylpropanoic acid (NIPAMPA)-co-N-isopropylacrylamide (NIPA)] (i.e., PC-g-TP), a novel interpenetrating terpolymer network hydrogel of excellent physicochemical properties and reusability, was synthesized via grafting of PC and in situ strategic protrusion of third monomer, i.e., NIPAMPA, during polymerization of MAA and NIPA, using response surface methodology optimized amounts of ingredients and temperature, for superadsorption of hazardous metal ions, such as Cd(II), Hg(II), and Pb(II). The in situ allocation of NIPAMPA via NH activation, grafting of PC into MAA-co-NIPAMPA-co-NIPA matrix, physicochemical properties, and superadsorption mechanism were rationalized via extensive microstructural analyses of unadsorbed and/or adsorbed PC-g-TP through H-/C-NMR, XPS, FTIR,TGA, XRD, FESEM, DLS, %gel content, pH, and %graft ratio. The spontaneous chemisorption data exhibited excellent fitting with Langmuir model. The adsorption capacities (ACs) were 1315.32, 1172.97, and 1269.09 mg g for Cd(II), Hg(II), and Pb(II), respectively, at 293 K, 0.02 g of PC-g-TP, and within 500-1000 ppm.
果胶（PC）-g-[甲基丙烯酸（MAA）-co-3-（N-异丙基丙烯酰胺基）-2-甲基丙磺酸（NIPAMPA）-co-N-异丙基丙烯酰胺（NIPA）]（即 PC-g-TP）是一种新型的互穿共聚聚合物网络水凝胶，具有优异的物理化学性质和可重复使用性。该水凝胶通过在 MAA 和 NIPA 聚合过程中接枝 PC 和原位战略突出第三单体 NIPAMPA 来合成，使用响应面法优化了成分和温度的用量，用于超吸附有害金属离子，如 Cd(II)、Hg(II) 和 Pb(II)。通过 NH 活化原位分配 NIPAMPA、将 PC 接枝到 MAA-co-NIPAMPA-co-NIPA 基质中、物理化学性质和超吸附机制，通过未吸附和/或吸附的 PC-g-TP 的 H-/C-NMR、XPS、FTIR、TGA、XRD、FESEM、DLS、%凝胶含量、pH 值和%接枝比的广泛微观结构分析进行了合理化。自发化学吸附数据与 Langmuir 模型拟合良好。在 293 K、0.02 g PC-g-TP 和 500-1000 ppm 范围内，Cd(II)、Hg(II) 和 Pb(II)的吸附容量（AC）分别为 1315.32、1172.97 和 1269.09 mg g。
