Research of the influence of microwave radiation on the permeability of siberian larch wood
Abstract
The wood of Siberian larch, due to the significant reserves available in the Siberian region, is a promising object for modification. However, because of the low permeability of wood, its impregnation with modifying compositions is practically impossible. The research presents the results of studies aimed at increasing the permeability of the heartwood of Siberian larch as a result of exposure to microwave radiation.
Experimental studies were carried out on wood samples with dimensions of 50×50×150 mm (the latter along the fibers) made from freshly cut heartwood of Siberian larch with an initial moisture content of 55 %. Microwave wood processing was carried out in a microwave chamber at a frequency of 2.45 GHz with the fixed power of 0.9 kW. The duration of microwave processing was 270 s and 330 s.
After microwave treatment, the wood was impregnated in an autoclave at a pressure of 0.5 MPa for 40 minutes. To simulate the processes occurring in assortment of industrial sizes, the ends of some samples were sealed. An aqueous solution of FeSO4 was used as the impregnating composition.
The obtained experimental data show that microwave processing of larch wood can effectively increase the permeability of wood both along and across fibers. In the course of research, it was found that microwave treatment provides an 2.5–2.6 times increase in the absorption of the impregnating solution by wood, and the depth of impregnation across the fibers by 2.3 times. When impregnating short assortments, microwave processing allows achieving thorough impregnation of wood. Excessive microwave processing may cause the wood to break along the fibers.
About the Authors
S. G. Eliseev
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
V. N. Ermolin
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
S. S. Stupnikov
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
References
1. Utkin A. I., Zamolodchikov D. G., Chestnykh O. V. Organic carbon in larch forests of Russia // Coniferous boreal zones. 2003. Vol. 21, No. 1. P. 66–76.
2. Ugolev B. N. Wood science and forest commodity science : Textbook. Moscow, GOU VPO MGUL, 2007, 351 p.
3. Kharuk E. V. Permeability of wood to gases and liquids. Novosibirsk, Science, 1976, 197 p.
4. Baraks A. M., Nikifirov Yu. N. Deep impregnation of wood by applying pricks. Moscow, Timber industry, 1969, 156 p.
5. Bazhenov V. A., Moskaleva V. E. On the permeability of sapwood and pine kernels by liquids and the possibility of its regulation // Tr. Institute of forests of the USSR Academy of Sciences. 1953, Vol. 9. P. 205–216.
6. Dzhaparidze L. I., Bregadze N. N. Features in the displacement of tori during the emergence of ripe wood // Botanical Journal of the USSR. 1940. Vol. 25, No. 4-5. P. 310–317.
7. Ermolin V. N. Fundamentals of increasing the permeability of coniferous wood liquids : Monograph ; Siberian State Technical University. Krasnoyarsk, 1999. T. 100.
8. Gorshin S. N. Wood preservation. Moscow, Timber industry, 1977, 336 p.
9. Wang Y., Ando K., Hattori N. Changes in the anatomy of surface and liquid uptake of wood after laser incising // Wood Sci Technol. 2013, Vol. 47, No. 3, P. 447–455.
10. Islam M. N., Ando K., Yamauchi H., Kobayashi Y., Hattori N. Comparative study between full cell and passive impregnation method of wood preservation for laser incised Douglas fir lumber // Wood Sci Technol. 2008, Vol. 42, No. 4. P. 343–350.
11. Stupnikov S. S. Increasing longitudinal permeability of siberian larch wood // Young people. Society. Modern science, technology and innovation. 2019, Vol. 18, P. 390–391.
12. He S., Lin L., Fu F., Zhou Y., Fan M. Microwave Treatment for Enhancing the Liquid Permeability of Chinese Fir // BioResources. 2014, Vol. 9, No. 2, P. 1924–1938.
13. Li X. J., Lu K. Y., Lin L. Y., Zhou Y. D., Cai Z. Y., Fu F. Fundamental characteristics of microwave explosion pretreatment of wood I. Properties of temperature development // Forestry Studies in China. 2010, Vol. 12, No. 1, P. 9–13.
14. S. Dashti H., Shahverdi M., Taghiyari H., Salehpur S.and Heshmati S. Effects of steaming and microwave pretreatments on mass transfer characteristics of aleppe oak (Quercus infectoria) // BioResources. 2012, Vol. 7, No. 3, P. 3262–3273.
15. Dömény J., Koiš V., Dejmal A. Microwave radiation effect on axial fluid permeability in false heartwood of beech (Fagus sylvatica L.) // BioResources. 2014, Vol. 9, No. 1, P. 372–380.
16. Hong-Hai L., Qing-Wen W., Lin Y., Tao J., YingChun C. A. I. Modification of larch wood by intensive microwave irradiation //Journal of Forestry Research. 2005, Vol. 16, No. 3, P. 237–240.
17. Terziev N., Daniel G., Torgovnikov G., Vinden P. Effect of Microwave Treatment on the Wood Structure of Norway Spruce and Radiata Pine // BioResources. 2020. Vol. 15, No. 3, P. 5616–5626.
18. Daian G. Delamination in Timber Induced by Microwave Energy // Delamination in Wood, Wood Products and Wood-Based Composites. Springer, Dord-recht, 2010, P. 159–172.
19. Vrublevskaya V. I., Matusevich V. O., Nevzorova A. B. Interaction of microwave radiation with hygroscopic moisture in wood // Bulletin of F. Skorina Gomel State University. 2006, No. 6, P. 42–48.
20. Torgovnikov G., Vinden P. Microwave wood modification technology and its applications // Forest Products Journal. 2010, Vol. 60, No. 2, P. 173–182.
21. Torgovnikov G., Vinden P. New wood based materials “Torgvin” and “Vintorg” // Proceedings of 5th Pacific Rim Bio-based Composites Symposium, Canberra, Australia. 2000, P. 756–764.
22. Torgovnikov G., Vinden P. Microwave modification of wood properties: improvements in wood permeability // The International Research Group on Wood Preservation, Kona, Hawaii, IRG/WP 00-40181, 2000.
23. Vinden P., Torgovnikov G. The physical manipulation of wood properties using microwave // Proceedings, International Conference of IUFRO, The Future of Eucalypts for wood production, March 19–24, Tasmania, Australia, 2000, P. 240–247.
24. Yang L. Modification on the permeability of larch wood by microwave // Thesis of master degree, Northeast Forestry University, Harbin, China, 2004.
Review
For citations:
Eliseev S.G., Ermolin V.N., Stupnikov S.S. Research of the influence of microwave radiation on the permeability of siberian larch wood. Conifers of the boreal area. 2023;41(7):616-622.
Views:
8
Email this article 