Development of the composition of the composition for the production of wood slabs based on the mechanized mass

Particleboards made of wood shavings (PWS) are widely used in furniture and other products manufacturing. The significant disadvantage of these boards is the emission of formaldehyde during use, caused by the presence of formaldehyde resins. This work presents the results of research on the development of a composition for obtaining shavings boards with properties similar to PWS but without the use of synthetic binders.

The proposed boards consist of wood particles (filler) and activated wood mass (matrix). In the research, shavings were used as filler, manufactured using a milling cutter. The wood mass was obtained by treating wood sawdust in a rotary-type hydrodynamic disperser. A multifactor experiment was conducted to determine the dependence of the composition (filler fraction and size, board density) on the mechanical properties (strength under static bending, perpendicular tensile strength) and board swelling. As a result, it was established that the strength indicators of the boards increase with a decrease in the size of the filler particles, an increase in board density, and a decrease in the filler fraction in the composition. Swelling along the thickness of the board decreases with an increase in the filler particle size, a decrease in its fraction in the composition, and an increase in board density.

Using the obtained patterns of the composition's influence on its properties, a multicriteria optimization was carried out. As a result, the optimal composition was established: 70 % filler fraction, shavings fraction number 3, board density 700 kg/m³. This composition allows obtaining boards that meet all the requirements for PWS while having formaldehyde emission class E0. They can be used without any restrictions.

1. Leonovich A. A. Technology of wood boards: progressive solutions. 2005.

2. Jambreković V. et al. Mogućnost proizvodnje kompozitnih materijala od usitnjenog drva u Republici Hrvatskoj // Drvna industrija. 2006. Т. 57, № 4. С. 183– 191.

3. Johannes Karl Fink, Chapter 4 – Phenol/ Formaldehyde Resins, Editor(s): Johannes Karl Fink, In Plastics Design Library, Reactive Polymers Fundamentals and Applications (Second Edition), William Andrew Publishing, 2013. P. 155–177. ISBN 978-1-45573-149-7.

4. Dedkova L. A., Lisetskaya L. G. Formaldehyde emission into indoor air // Acta Biomedica Scientifica. 2011. № 3-2. Pp. 76–79.

5. https://zctc.ru/sections/fenol_i_formaldegid_v_pomesheniyah.

6. Antonović A. et al. Influence of urea-formaldehyde resin modification with liquefied wood on particleboard properties // Drvna industrija. 2010. Т. 61, № 1. С. 5–14.

7. Karimov O. H. et al. Development of chemistry and technology of lignin biopolymer // Industrial production and use of elastomers. 2020. № 1. Pp. 25–39.

8. Prasittisopin L., Li K. A new method of making particleboard with a formaldehyde-free soy-based adhesive // Composites Part A: Applied Science and Manufacturing. 2010. Т. 41, № 10. С. 1447–1453.

9. Gross G. G. Biosynthesis of lignin and related monomers // The Structure, Biosynthesis, and Degradation of Wood. 1977. С. 141–184.

10. Sivasubramanian S., Schmidt D. F., Reynaud E. Novel bio-based thermoset resins from epoxidized vegetable oils for structural applications // 68th Annual Technical Conference of the Society of Plastics Engineers. 2010. С. 1673–1677.

11. Preechatiwong W., Yingprasert W., Kyokong B. Effects of phenol-formaldehyde/isocyanate hybrid adhesives on properties of oriented strand lumber (OSL) from rubberwood waste // Songklanakarin Journal of Science and Technology. 2007. Т. 29, № 5. С. 1367– 1375.

12. Zarubina A. N. et al. Cellulose and nanocellulose. Review //Forest Bulletin/Forestry bulletin. 2019. Vol. 23, No. 5. Pp. 116–125.

13. Rakhimova B. U. et al. Nanocellulose: characterization, modification and biocompatibility // Kazakhstan Science news. 2019. № 4 (142). P. 72.

14. Amini E. et al. Utilization of cellulose nanofibrils as a binder for particleboard manufacture // BioResources. 2017. Т. 12, № 2. С. 4093–4110.

15. The use of nanocellulose in the processes of gluing and modifying wood / V. A. Shamaev, N. S. Nikulina, S. A. Konstantinova et al. // Vestnik MGUL – Lesnoy vestnik. 2012. № 8(91). Pp. 107–110.

16. Gardner D., Tajvidi M. Hydrogen bonding in wood-based materials: an update // Wood and Fiber Science. 2016. Т. 48, № 4. С. 234–244.

17. Ermolin V. N. et al. Water resistance of wood slabs obtained without the use of binders // News of higher educational institutions. Forest Magazine. 2020. № 3 (375). Pp. 151–158.

18. Oblivin A. N., Lopatnikov M. V. Nanotechnologies and nanomaterials in the forest complex : monograph. M. : MGUL, 2011. 221 p.

19. Puchkov B. V. Grinding of raw materials for wood slabs // Moscow : Lesn. prom-st, 1980. 117 p. 1980.

20. Alexandrova A. N., Solovieva T. V. Intensification of defibratory chip grinding. 2013.

21. Modlin B. D., Otlev I. A. Production of particle boards. M. : Higher school, 1977.

22. GOST 19222–84. Arbolite and its products. General technical conditions.

23. GOST R 54854–2011. Concretes are light on organic aggregates of plant origin. Technical conditions.

24. Ermolin V. N. et al. Development of a regime of hydrodynamic activation of wood particles in order to obtain plates without binders // Coniferous boreal zones. 2017. Vol. 35, No. 3-4. Pp. 79–83.

25. Demidov Yu. M. Wood grinding for the production of particle boards // Forestry industry. 1974. Pp. 100–105.

26. Gravelsins R. J. Studies of grinding of wood and bark-wood mixtures with the Szego mill : дис. 1999.

27. Voit V. B., Khusainov D. F. Properties of DStP from the point of view of the rheokinetics of carbamideformaldehyde resin curing during its aging // Technology of wood boards and plastics: interuniversity collection. 1997. Pp. 76–83.

28. Metzger M. T. Naturnahe Bindemittel aus nachwachsenden Rohstoffen auf Proteinbasis zur Herstellung von Holzwerkstoffen. München: Technischen Universität München, 2007. 159 s.

29. Roffael E., Dix B., Schneider T. Zur Verwendung von Tanninen als Bindemittel in der Holzwerkstoffindustrie // Tagungsband “Internationales Simposium Werkstoffe aus nachwachsenden Rohstoffen”. Erfurt : WKI, 2001. S. 15‒22.

30. Maltsev V. V. Technologies of detoxification of carbamide-formaldehyde resins (CFS) and wood-board materials based on them [Electronic resource] // Abstracts of the report at the 12th International Forum “High Technologies of the XXI century”. 2011. URL: http://www.ecrushim.ru/articles/pg171.php (accessed: 24.09.2017).

31. GOST 10632–2014. Chipboard slabs. Technical conditions. Introduction. 01.07.2015. Moscow : Standartinform, 2014. 16 p. (National Standard of the Russian Federation).