from 01.01.2005 until now
Yekaterinburg, Ekaterinburg, Russian Federation
Ekaterinburg, Ekaterinburg, Russian Federation
The existing methods for producing lignocellulose plastics without synthetic resins (PWR) are based on piezothermic processing of plant raw materials. Despite the variety of approaches, the mechanism of composite formation remains poorly understood due to the complexity of the raw material composition and the variety of accompanying chemical processes. It is known that natural lignin, which interacts with formaldehyde released from vegetable raw materials when heated, plays a key role in the formation of the polymer matrix. Thus, the emission of free formaldehyde from the finished material can serve as an indirect indicator of the depth of the polymerization and crosslinking reactions of lignin. The purpose of this work was to study the mechanisms of interaction of formaldehyde with lignin, as well as the effect of special reagents on these processes - carbamide and urotropin. The subject of the study was chemical and physico-mechanical changes in PWR with varying humidity of raw materials, pressing temperature and concentration of additives. The production of PWR samples was carried out by hot pressing compositions based on pine sawdust in closed molds. Three main characteristics of the obtained materials were analyzed: the change in mass, the modulus of elasticity under bending (according to the deflection of the disk sample) and the level of formaldehyde emission. The method of mathematical planning of experiments was used to determine the optimal combination of factors and predict the dependence of properties on the introduced additives and technological parameters. The results of the study demonstrated that formaldehyde is actively involved in the formation of PWR, and its emission, depending on the conditions of production, indicates the degree of ongoing chemical interactions with natural lignin.
COMPOSITE, MANUFACTURING, PINE SAWDUST, NATURAL LIGNIN, FORMALDEHYDE, HEXAMETHYLENETETRAMINE, UREA, POLYMERIZATION, OPTIMIZATION, FORMALDEHYDE EMISSION, PROPERTIES
1. B. Meyer, C. Bochmc, Forest Products Journal, 47 (5), 45-48 (1997).
2. Z. Que, T .Furuno, Wood Science and Technology, 41 (3), 267-279 (2007). DOI: https://doi.org/10.1007/s00226-006-0104-7
3. M.Z.M. Salem, M. Böhm, BioResources, 8 (3), 4775-4790 (2013). DOI: https://doi.org/10.15376/biores.8.3.4775-4790
4. I.F. Kochurov, V.G. Palkin, Modern Construction Technologies: Theory and Practice, 1, 190-195 (2024). EDN: https://elibrary.ru/FGCLDA
5. Y. Fu, Z. Yuan, Q. S. Sheldon, B. Goodell, Green Chemistry, 24, 6631-6638 (2022). https://doi.org/10.1039/D2GC02632E. EDN: https://elibrary.ru/AIVRBS
6. L.H. Carvalho, F.D. Magalhães, J.M. Ferra, Formaldehyde: Chemistry, Applications and Role In Polymerization, (2012). https://www.researchgate.net/publication/236273710.
7. M. Schafer, E. Roffacl, Holz als Roh- und Werkstoff, 58, 259-264 (2000).
8. Yu.S. Mikhaylova, Polythematic Network Electronic Scientific Journal of Kuban State Agrarian University, 73, 114-124 (2011). EDN: https://elibrary.ru/OJYEXP
9. A. Vititnev, S. Kazitsin, BioResources, 20, 3, 5315-5330 (2025). DOI:https://doi.org/10.15376/biores.20.3.5315-5330. EDN: https://elibrary.ru/HRPRYP
10. N. Saadaoui, A. Rouilly, K. Fares, L. Rigal, Materials and Design, 50, 302-308 (2013). DOI:https://doi.org/10.1016/j.matdes.2013.03.011.
11. V. S. Boltovskiy, Proceedings of BSTU. Series 2: Chemical Technology, Biotechnology, Geoecology, 2, 247, 5-12 (2021). DOI:https://doi.org/10.52065/2520-2669-2021-247-2-5-12. EDN: https://elibrary.ru/OWAGRN
12. A.V. Artemov, V.G. Buryndin, P.S. Krivonogov et al., Polymer Science. Series D, 16, 278-284 (2023).
13. D. Zhang, A. Zhang, L. Xue, Wood Science and Technology, 49, 661-679 (2015). https://doi.org/10.1007/s0022 6-015-0728-6.
14. C.P. Araújo Junior, C.A.C. Coaquira, A.L.A. Mattos et al., Waste Biomass Valoriz, 9, 2245-2254 (2018). DOI: https://doi.org/10.1007/s12649-017-9979-9; EDN: https://elibrary.ru/RLAMBP
15. M. Nassar, G. MacKay, Wood and Fiber Science, 16, 441-53 (1984).
16. M. Brebu, C. Vasile, Cellulose Chemistry and Technology, 44, 9, 353-363 (2010). EDN: https://elibrary.ru/OLPERN
17. D. Ciolkosz, R. Wallace, Biofuels, Bioproducts and Biorefining, 5, 317-329 (2011).
18. V. M. Rezenkov, Chemistry of Wood, 3, 3-23 (1977).
19. I.Ya. Klevinskaya, A.P. Treimanis, A.Ya. Alksne et al., Chemistry of Wood, 1, 57–65 (1991).
20. P.V. Kolosov, N.G. Bazarnova, V.I. Markin, High-Molecular Weight Products of Carboxymethylation of Vegetable Raw Material with Sorption. Barnaul, ASU, 2014. 134 p. EDN: https://elibrary.ru/SYLKMT
21. G. P. Sastry, Holzforschung, 23, 1, 15-17 (1969). DOI: https://doi.org/10.1515/hfsg.1969.23.1.15
22. P.K. Latysheva, A.V. Savinovskikh, A.V. Artemov et al., Actual Problems of Modern Science, Engineering and Education, 1, 219-221 (2016). EDN: https://elibrary.ru/WMBOYL
23. A.V. Myalitsyn, Methodology of Experiment Planning and Processing Results when Studying Technological Processes in Timber Industry. Yekaterinburg, USFEU, 2023. 76 p. EDN: https://elibrary.ru/JBUMAV
24. N.M. Mukhin, A.E. Shkuro, A.V. Artemov et al. Determination and Optimization of Pressing Parameters for Reactoplastics. Yekaterinburg, USFEU, 2024. 70 p. EDN: https://elibrary.ru/PLEAIJ
25. A.E. Shkuro, A.V. Artemov, N.S. Shtabnov, V.G. Buryndin, Woodworking: Technologies, Equipment, Management of the XXI Century Conference Proceedings (Yekaterinburg, Russia, September 13–15, 2025). USFEU, 2025, pp. 96–101.
26. A.E. Shkuro, O.F. Shishlov, V.V. Glukhikh, Production and Determination of Chipboard Properties. Yekaterinburg, USFEU, 2016. 30 p.
27. A.V. Artemov, A.E. Shkuro, V.G. Buryndin, V.E. Tsvetkov, Adhesives. Sealants. Technologies, 10, 2-13 (2025). DOI:https://doi.org/10.31044/1813-7008-2025-0-10-2-13 EDN: https://elibrary.ru/GAHOZP
