基于聚丙烯酰胺的水凝胶制备新方法：在干燥水溶液条件下用1,3 - 二甲基咪唑鎓（膦酰氧基 - ）低聚硫化物引发丙烯酰胺聚合 - Suppr

The New Approach to the Preparation of Polyacrylamide-Based Hydrogels: Initiation of Polymerization of Acrylamide with 1,3-Dimethylimidazolium (Phosphonooxy-)Oligosulphanide under Drying Aqueous Solutions.

作者信息

Tarasova Natalia, Zanin Alexey, Krivoborodov Efrem, Toropygin Ilya, Pascal Ekaterina, Mezhuev Yaroslav

机构信息

Institute of Chemistry and Problems of Sustainable Development, Dmitry Mendeleev University of Chemical Technology of Russia, Moscow 12047, Russia.

Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Moscow 119017, Russia.

出版信息

Polymers (Basel). 2021 May 30;13(11):1806. doi: 10.3390/polym13111806.

The new initiator of the polymerization of acrylamide, leading to the formation of crosslinked polyacrylamide, was discovered. The structure of the synthesized polyacrylamide was characterized by XRD, Н NMR, and С NMR spectroscopy. It was shown that 1,3-dimethylimidazolium (phosphonooxy-)oligosulphanide is able to initiate radical polymerization under drying aqueous solutions of acrylamide, even at room temperature. According to XRF data, the synthesized polyacrylamide gel contains 0.28 wt% of sulphur. The formed polymer network has a low crosslinking density and a high equilibrium degree of swelling. The swelling rate of polyacrylamide gel in water corresponds to the first order kinetic equation with the rate constant 6.2 × 10 min. The initiator is promising for combining acrylamide polymerization with the processes of gel molding and drying.

发现了导致形成交联聚丙烯酰胺的丙烯酰胺聚合反应的新型引发剂。通过X射线衍射（XRD）、核磁共振氢谱（Н NMR）和核磁共振碳谱（С NMR）光谱对合成的聚丙烯酰胺的结构进行了表征。结果表明，1,3 - 二甲基咪唑鎓（膦酰氧基）低聚硫化物即使在室温下也能够引发丙烯酰胺干燥水溶液中的自由基聚合反应。根据X射线荧光光谱（XRF）数据，合成的聚丙烯酰胺凝胶含有0.28 wt%的硫。形成的聚合物网络具有低交联密度和高平衡溶胀度。聚丙烯酰胺凝胶在水中的溶胀速率符合一级动力学方程，速率常数为6.2×10⁻⁴ min⁻¹。该引发剂有望将丙烯酰胺聚合与凝胶成型和干燥过程相结合。