Melnikov Yevgeniy, Kondaurov Ruslan, Agibayeva Laura
Biochemical Engineering Department, International Engineering and Technological University, Al-Farabi Ave. 93a, 050060 Almaty, Kazakhstan.
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Al-Farabi Ave. 71, 050040 Almaty, Kazakhstan.
Polymers (Basel). 2023 Mar 13;15(6):1420. doi: 10.3390/polym15061420.
This present study is targeted at the complex investigation of the behavior of interpolymer systems based on acidic rarely crosslinked polymeric hydrogels (polyacrylic acid hydrogel (hPAA); polymethacrylic acid hydrogel (hPMAA)) and basic rarely crosslinked polymeric hydrogels (poly-4-vinylpyridine hydrogel (hP4VP), specifically the poly-2-methyl-5-vinylpyridine hydrogel (hP2M5VP)) either in an aqueous medium or lanthanum nitrate solution. We found that the transition of the polymeric hydrogels in the developed interpolymer systems (hPAA-hP4VP, hPMAA-hP4VP, hPAA-hP2M5VP, and hPMAA-hP2M5VP) into highly ionized states leads to significant changes in electrochemical, conformational, and sorption properties of the initial macromolecules. The subsequent mutual activation effect demonstrates strong swelling of both hydrogels in the systems. The sorption efficiency of lanthanum by the interpolymer systems is 94.51% (33%hPAA:67%hP4VP), 90.80% (17%hPMAA-83%hP4VP), 91.55% (67%hPAA:33%hP2M5VP), and 90.10% (50%hPMAA:50%hP2M5VP). An advantage of the interpolymer systems (compared to individual polymeric hydrogels) is the strong growth of their sorption properties (up to 35%) due to high ionization states. Interpolymer systems can be considered new-generation sorbents for further application in the industry for highly effective sorption of rare earth metals.
本研究旨在对基于酸性极少交联聚合物水凝胶（聚丙烯酸水凝胶（hPAA）；聚甲基丙烯酸水凝胶（hPMAA））和碱性极少交联聚合物水凝胶（聚-4-乙烯基吡啶水凝胶（hP4VP），特别是聚-2-甲基-5-乙烯基吡啶水凝胶（hP2M5VP））的互聚物体系在水介质或硝酸镧溶液中的行为进行综合研究。我们发现，在已开发的互聚物体系（hPAA-hP4VP、hPMAA-hP4VP、hPAA-hP2M5VP和hPMAA-hP2M5VP）中，聚合物水凝胶转变为高度离子化状态会导致初始大分子的电化学、构象和吸附性能发生显著变化。随后的相互活化作用表明体系中两种水凝胶都有强烈的溶胀。互聚物体系对镧的吸附效率分别为94.51%（33%hPAA:67%hP4VP）、90.80%（17%hPMAA-83%hP4VP）、91.55%（67%hPAA:33%hP2M5VP）和90.10%（50%hPMAA:50%hP2M5VP）。互聚物体系（与单个聚合物水凝胶相比）的一个优点是由于高离子化状态，其吸附性能有显著提高（高达35%）。互聚物体系可被视为新一代吸附剂，可进一步应用于工业中高效吸附稀土金属。
