Czarnecka Elżbieta, Nowaczyk Jacek
Chair of Physical Chemistry and Physicochemistry of Polymers, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarina street, 87-100 Toruń, Poland.
Plastica Sp. z o.o., Frydrychowo 55, 87-410 Kowalewo Pomorskie, Poland.
Polymers (Basel). 2020 Aug 10;12(8):1794. doi: 10.3390/polym12081794.
Biopolymer-based superabsorbent polymers (SAPs) are being synthesized and investigated as a biodegradable alternative for an entirely synthetic SAPs, particularly those based on acrylic acid and its derivatives. This article focuses on the chemical modification of starch (S), and synthesis of new potentially biodegradable polymers using acrylic acid (AA) as side chain monomer and crosslinking mediator together with ,'-methylenebisacrylamide (MBA). The graft co-polymerization was initiated by ceric ammonium nitrate (CAN) or potassium persulfate (KPS), leading to different reaction mechanisms. For each of the initiators, three different synthetic routes were applied. The structures of new bio-based SAPs were characterized by means of IR spectroscopy. Thermogravimetric measurements were made to test the thermal stability, and morphology of the samples were examined using scanning electron microscopy (SEM). Physico-chemical measurements were performed to characterize properties of new materials such as swelling characteristics. The water absorption capacity of resulting hydrogels was measured in distilled water and 0.9% NaCl solution.
基于生物聚合物的高吸水性聚合物（SAPs）正在被合成和研究，作为完全合成的SAPs的可生物降解替代品，特别是那些基于丙烯酸及其衍生物的SAPs。本文重点关注淀粉（S）的化学改性，以及使用丙烯酸（AA）作为侧链单体和交联介质，与N,N'-亚甲基双丙烯酰胺（MBA）一起合成新型潜在可生物降解聚合物。接枝共聚由硝酸铈铵（CAN）或过硫酸钾（KPS）引发，导致不同的反应机制。对于每种引发剂，应用了三种不同的合成路线。通过红外光谱对新型生物基SAPs的结构进行了表征。进行热重测量以测试热稳定性，并使用扫描电子显微镜（SEM）检查样品的形态。进行物理化学测量以表征新材料的性能，如溶胀特性。在蒸馏水和0.9%氯化钠溶液中测量所得水凝胶的吸水能力。
