Sunflower husk as a raw material for particle board type plates

The properties of sunflower seed shells were studied in order to use husks in the manufacture of slab materials. To eliminate the unacceptable shape of the "boats", they were shaped into flat particles by passing husks through rolls with a set lumen value of 0.1...0.4 mm. A deterioration in the wettability of the urea-formaldehyde binder solution of the outer and inner surfaces was found when heated to a temperature of 140 °C. The hardness of the husk increased in terms of softening compared to wood and the boundary values of the hot pressing parameters, which range from 241 ± 2 °C – the lower value, to 256 °C – the upper value, which is limited by the active thermal decomposition of the husk substance, were established. For the practical use of husks in the production of plates, it is necessary to include increased binder consumption in the technology or develop suitable husk plasticization techniques to reduce the softening temperature and the possibility of using pressing equipment, the potential for modernization of which has already been exhausted. The probable area of manufacture of slab material from husk is construction, the probable grades of plates – P-1 and P-2.

1. Akim E.L. Modern problems and prospects of bio – refining of vegetable raw materials. Forest of Russia: politics, industry, science, education: materials of the IV NTC. St. Petersburg: SPbFTU, 2019, pp. 262–264. (In Russ.)

2. Glazkov S.S. Patent No. 2196045 «The method of making plates from sunflower husks». Publ. 10.01.2003. (In Russ.)

3. Gneush A.N., Yurina N.A., Kopyltsov S.V., Petenko A.I. Bioconversion of plant raw materials. Krasnodar : KubSAU, 2020. 187 p. (In Russ.)

4. Kargin V.A., Kozlov P.V., Nai Chan Wang. On the glass transition temperature of cellulose. Reports of A.N. USSR, 1968, vol. 130, no. 2, pp. 356–358. (In Russ.)

5. Kirsanov M.P., Samoilova N.A., Tymoshchuk I.V. Ecology:eco-protective equipment and technologies at enterprises of fat-and-oil, sugar, yeast, bakery, confectionery industries. Kemerovo: KemSU, 2010. 176 p. (In Russ.)

6. Leonovich A.A. Physico-chemical foundations of the formation of wood slabs. Vologda: Infra-Engineering, 2022. 224 p. (In Russ.)

7. Leonovich A.A., Kulikov V.N., Zamaziy L.V., Ovsyannikov E.A. Probabilistic analysis of adhesive compounds in materials from crushed particles. Forests of Russia: politics, industry, science, education: materials of the VNTC. Ed. by A.A. Dobrovolsky. St. Petersburg: SPbFTU, 2024, pp. 405–408. (In Russ.)

8. Loskutov S.R., Shapchenkova O.A., Aniskina A.A. Thermal properties and kinetics of thermal degradation of Siberian coniferous and deciduous wood. Forests of Russia: politics, industry, science, education: materials of the VNTC. Ed. by A.A. Dobrovolsky. St. Petersburg: SPbFTU, 2024, pp. 411–414. (In Russ.)

9. Plotnikova N.P., Chelysheva I.N. Investigation of the properties of thermal insulation materials based on sunflower husk. Methods. Technologies, 2021, no. 1(49), pp. 86–89. (In Russ.)

10. Torikov V.E., Melnikova O.V. Scientific foundations of agronomy. 4th ed. St. Petersburg: Lan, 2024. 348 p. (In Russ.)

11. Ugryumov S.A. Improving the technology of production of composite materials based on wood fillers and flax bonfires: diss. ... Doctor of Technical Sciences: 05.21.05. M.: MSUF, 2009. 373 p. (In Russ.)

12. Ugryumov S.A. Investigation of the properties of slab materials based on various fillers. MSUF Bulletin is a forest bulletin, 2001, no.5, pp. 143–146. (In Russ.)

13. Vanshin V.V. Production of vegetable oils. Orenburg : OSU, 2015. 243 p. (In Russ.).