Malyar Yuriy N, Borovkova Valentina S, Kazachenko Alexander S, Fetisova Olga Yu, Skripnikov Andrey M, Sychev Valentin V, Taran Oxana P
Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk 660036, Russia.
School of Non-Ferrous Metals and Materials Science, Siberian Federal University, pr. Svobodny 79, Krasnoyarsk 660041, Russia.
Polymers (Basel). 2023 Apr 23;15(9):1999. doi: 10.3390/polym15091999.
To ensure the high quality of water, it is necessary to remove toxic pollutants. At present, purification of water is implemented using various sorbents. The efficient sorption materials are modified polysaccharides. In this study, we report on a new environmentally friendly method for modifying larch hemicellulose-arabinogalactan (AG)-with polybasic carboxylic acids (citric, succinic, oxalic, and adipic) to obtain composite materials. The synthesized AG derivatives have been explored by a complex of physicochemical methods, including gel permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffractometry (XRD), scanning electron microscopy (SEM), and sorption capacity investigations. It is shown that the heat treatment results in the formation of additional inter- and intramolecular bonds between carboxylic acids and polysaccharide molecules. The formation of ester bonds has been confirmed by the appearance of absorption bands in the IR spectra in the range of 1750-1690 cm. It has been found, using the TGA study, that the most thermally stable (up to 190 °C) sample is arabinogalactan oxalate obtained under heat treatment. The SEM study of the synthesized AG films has shown that the modified samples have the homogeneous film surface ensured by cross-linking. It has been established, when studying the sorption properties of the AG derivatives, that AG succinate (82.52%) obtained by lyophilization has the highest sorption capacity, due to the developed mesoporous surface, which, in turn, makes the synthesized films promising eco-friendly materials for use as drug carriers, sorbents, and water treatment agents.
为确保水的高质量，去除有毒污染物是必要的。目前，水的净化是使用各种吸附剂来实现的。高效的吸附材料是改性多糖。在本研究中，我们报告了一种用多元羧酸（柠檬酸、琥珀酸、草酸和己二酸）改性落叶松半纤维素 - 阿拉伯半乳聚糖（AG）以获得复合材料的新型环保方法。通过包括凝胶渗透色谱（GPC）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）、X射线衍射（XRD）、扫描电子显微镜（SEM）和吸附容量研究在内的一系列物理化学方法对合成的AG衍生物进行了探索。结果表明，热处理导致羧酸与多糖分子之间形成额外的分子间和分子内键。红外光谱中1750 - 1690 cm范围内吸收带的出现证实了酯键的形成。通过TGA研究发现，热处理得到的最耐热（高达190℃）的样品是阿拉伯半乳聚糖草酸盐。对合成的AG膜的SEM研究表明，改性样品具有通过交联确保的均匀膜表面。在研究AG衍生物的吸附性能时发现，通过冻干获得的AG琥珀酸盐（82.52%）具有最高的吸附容量，这归因于发达的介孔表面，这反过来又使合成的膜成为用作药物载体、吸附剂和水处理剂的有前景的环保材料。
