Preparation and Characterization of di- and Tricarboxylic Acids-Modified Arabinogalactan Plasticized Composite Films

• Published in: Polymers 2023-04, Vol.15 (9), p.1999
• Main Authors: Malyar, Yuriy N, Borovkova, Valentina S, Kazachenko, Alexander S, Fetisova, Olga Yu, Skripnikov, Andrey M, Sychev, Valentin V, Taran, Oxana P
• Format: Article
• Language: English
• Subjects: Absorption spectra; Acids; Analysis; Carboxylic acids; Cellulose; Chemical properties; Chemical synthesis; Chromatography; Composite materials; Crosslinking; Decomposition; Dielectric films; Diffraction; Drug carriers; Drug delivery systems; Drugs; Fourier transform infrared spectroscopy; Fourier transforms; Heat treatment; Infrared analysis; Infrared spectroscopy; Instrument industry; Liquid chromatography; Mechanical properties; Methods; Methylene blue; Molecular weight; Oxalates; Oxalic acid; Pollutants; Polyethylene glycol; Polymers; Polysaccharides; Potassium; Scanning electron microscopy; Scanning microscopy; Software; Sorbents; Sorption; Structure; Synthesis; Thermal stability; Thermogravimetric analysis; Thin films; Vehicles; Water purification; Water quality; Water treatment; X-rays
• ISSN: 2073-4360; 2073-4360
• 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.