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Molecules 2017, 22(11), 1908; doi:10.3390/molecules22111908

Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma

1
Moscow Institute of Physics and Technology, Institutsky per., 9, Dolgoprudny, 141700 Moscow, Russia
2
Core Facility Center “Arktika”, Northern (Arctic) Federal University, Severnaya Dvina Emb., 17, 163002 Arkhangelsk, Russia
3
Federal State Institution, Federal Research Centre, Fundamentals of Biotechnology of RAS, Institute of Bioengineering, 60 let Oktjabrja pr-t, 7/1, 117312 Moscow, Russia
Presented at 13th International conference of the European Chitin Society/8th Symposium of the Iberoamerican Chitin Society.
*
Author to whom correspondence should be addressed.
Received: 3 September 2017 / Revised: 26 October 2017 / Accepted: 27 October 2017 / Published: 6 November 2017
(This article belongs to the Special Issue Advances in Natural Polysaccharides Research)
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Abstract

Polysaccharide processing by means of low-temperature Electron Beam Plasma (EBP) is a promising alternative to the time-consuming and environmentally hazardous chemical hydrolysis in oligosaccharide production. The present paper considers mechanisms of the EBP-stimulated destruction of crab shell chitin, cellulose sulfate, and microcrystalline cellulose, as well as characterization of the produced oligosaccharides. The polysaccharide powders were treated in oxygen EBP for 1–20 min at 40 °C in a mixing reactor placed in the zone of the EBP generation. The chemical structure and molecular mass of the oligosaccharides were analyzed by size exclusion and the reversed phase chromatography, FTIR-spectroscopy, XRD-, and NMR-techniques. The EBP action on original polysaccharides reduces their crystallinity index and polymerization degree. Water-soluble products with lower molecular weight chitooligosaccharides (weight-average molecular mass, Mw = 1000–2000 Da and polydispersity index 2.2) and cellulose oligosaccharides with polymerization degrees 3–10 were obtained. The 1H-NMR analysis revealed 25–40% deacetylation of the EBP-treated chitin and FTIR-spectroscopy detected an increase of carbonyl- and carboxyl-groups in the oligosaccharides produced. Possible reactions of β-1,4-glycosidic bonds’ destruction due to active oxygen species and high-energy electrons are given. View Full-Text
Keywords: chitin; cellulose; oligosaccharides; low-temperature plasma; electron-beam plasma; plasma chemistry chitin; cellulose; oligosaccharides; low-temperature plasma; electron-beam plasma; plasma chemistry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Vasilieva, T.; Chuhchin, D.; Lopatin, S.; Varlamov, V.; Sigarev, A.; Vasiliev, M. Chitin and Cellulose Processing in Low-Temperature Electron Beam Plasma. Molecules 2017, 22, 1908.

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