Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.3390/polym14214521

Ключевые слова: antioxidant activity, aspen wood, delignification, hemicellulose, hsqc, molecular weight characteristics, optimization of the process

Аннотация: In this study, hemicelluloses of aspen wood (Pópulus trémula) were obtained by oxidative delignification in an acetic acid-water-hydrogen peroxide medium at temperatures of 70–100 °C and a process time of 1–4 h. The maximum polysaccharide yield of up to 9.68 wt% was reported. The composition and structure of the hemicelluloses wereПоказать полностьюstudied using a complex of physicochemical methods: gas and gel permeation chromatography, Fourier-transform infrared spectroscopy, 2D nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. The xylose, mannose, galactose, and glucose monomer units were identified in the hemicelluloses by gas chromatography. The weight average molecular weight Mw of the products determined by gel permeation chromatography was found to range within 8932–33,142 g/mol. The reported Fourier-transform spectra of the hemicelluloses contain all the bands characteristic of heteropolysaccharides; a weak lignin absorption signal in the spectra at 1500–1510 cm−1 is attributed to a minor content of phenolic fragments in the structure of the obtained hemicelluloses. The use of thermogravimetric analysis established that the hemicelluloses isolated from aspen wood are resistant against heating to temperatures of up to 90–100 °C and, upon further heating up to 400 °C, start destructing at an increasing rate. The antioxidant activity of the hemicelluloses was examined using the compounds that mimic free radicals (1,1-diphenyl-2-picrylhydrazyl) and hydroxyl radicals (salicylic acid). It was found that the activity of all polysaccharides in neutralizing DPPH and hydroxyl radicals is lower than the absorption capacity of vitamin C at all the tested concentrations (0.5, 2, and 5 mg/mL) and attains 81.7 and 82.9%, respectively. © 2022 by the authors.

Журнал: Polymers

Выпуск журнала: Vol. 14, Is. 21

Номера страниц: 4521

ISSN журнала: 20734360

Издатель: MDPI

• Borovkova V.S. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Malyar Y.N. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Sudakova I.G. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation)
• Chudina A.I. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation)
• Zimonin D.V. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Skripnikov A.M. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Miroshnikova A.V. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Ionin V.A. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Kazachenko A.S. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation, Department of Biological Chemistry with Courses in Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University of the Ministry of Healthcare of the Russian Federation, St. Partizan Zheleznyak, Bld. 1, Krasnoyarsk, 660022, Russian Federation)
• Sychev V.V. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Ponomarev I.S. (Institute of Chemistry and Chemical Technology, Krasnoyarsk Science Center, Siberian Branch Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation, School of Non-Ferrous Metals and Material Science, Siberian Federal University, Pr. Svobodny 79, Krasnoyarsk, 660041, Russian Federation)
• Issaoui N. (Laboratory of Quantum and Statistical Physics (LR18ES18), Faculty of Sciences, University of Monastir, Monastir, 5079, Tunisia)

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