University of West Hungary
Russian Federation
University of West Hungary
Shoporon, Hungary
Mytischi, Russian Federation
Mytischi, Russian Federation
The problem of industrial use of tree bark is relevant and has practical importance for complex processing of wood raw material. Barks are available in Hungary and Russia in large quantities, but they are not widely used for different purposes than producing energy. One of the perspective areas of utilization of tree bark is its use as raw material for the production of thermal insulation panels. The present study focuses on the thermal insulation capacity of tree bark. Thermal conductivity properties of two broadleaved (black locust (Robinia pseudoacacia), pannónia poplar (Populus euramericana cv. Pannónia)) and three coniferous (larch (Larix decidua), spruce (Picea abies) and scots pine (Pinus silvestris)) tree species were examined. Based on these results, the scopes of the tested species were further narrowed, while the best results showing black locust was used for pressed insulation panel. Three different fractions were produced made of grained black locust bark. Furthermore, the heat insulation capacities of bark were investigated by compressing the chipped bark particles until the lowest heat conductivity was reached. Results show a competitive thermal insulation property to the traditionally used insulation materials, the value was 0.0613 W/mK reached by black locust bark chips. The broadleaved tree bark chips have a lower thermal conductivity than coniferous species. By using fine, mid, and coarse fraction of black locust bark were produced and the difference of thermal conductivity between them was negligible. Although the fine fractionated black locust bark chip thermal conductivity was 0.042 W/mK.
thermal insulation capacity, thermal conductivity, tree bark, black locust
1. Melekhov V.I., Tyurikova T.V, Ponomareva N.G. Energeticheskiy potentsial drevesnoy kory v programme resursosberezheniya [ Energy potential of bark in resource saving program]. Aktual'nye napravleniya nauchnykh issledovaniy XXI veka: teoriya i praktika. [Current research areas of the XXI century: theory and practice]. Voronezh, 2015. no 9-3 (20-3), pp. 106-110. DOI: 10.12737 / 16877. (In Russian).
2. Pazstory Z., Borchok Z., Gorbacheva G.A. Balans CO2 razlichnykh vidov stenovykh konstruktsiy [Balance of CO2 of Different Types of Wall Structures]. Stroitel'nye materialy. [Building Materials]. Moscow, 2015. no 12, pp. 76- 77. (In Russian).
3. Povrezhdenie mikrostruktury stvola sosny posle lesnogo pozhara 2010 goda na territorii Voronezhskogo uchebno-opytnogo leshoza [Damage to pine trunk microstructure after the forest fire in the year 2010 at the territory of Voronezh experimental training forestry ] / N.E. Kosichenko, S.N. Snegirjova, A.D. Platonov, V.V. Chebotarjov // Politematicheskij setevoj jelektronnyj nauchnyj zhurnal Kubanskogo gosudarstvennogo agrarnogo universiteta (Nauchnyj zhurnal KubGAU) [Polythematic online scientific journal of Kuban State Agrarian University (Scientific Journal of KubSAU)] [Jelektronnyj resurs]. - Krasnodar: KubGAU, 2012. - №04(078). pp. 594 - 604. - IDA [article ID]: 0781204050. - Rezhim dostupa: http://ej.kubagro.ru/2012/04/pdf/50.pdf (In Russian).
4. Ushanova V.M. (2012). Kompleksnaya pererabotka drevesnoy zeleni i kory pikhty sibirskoy s polucheniem produktov, obladayushchikh biologicheskoy aktivnost'yu: dis. ... dokt. tekhn. nauk. [Complex processing of Siberian fir needles and bark for obtaining products having biological activity: Diss… for the degree of Doctor of Technical Sciences]. Krasnoyarsk (In Russian). Krasnoyarsk: Sibirskiy gosudarstvennyy tekhnologicheskiy universitet, 2012, p. 379. (In Russian).
5. Hoong Y.B., Paridah M.T., Loh Y.F., Jalaluddin H., Chuah L.A. A new source of natural adhesive: Acacia mangium bark extracts co-polymerized with phenol-formaldehyde(PF) for bonding Mempisang (Annonaceae spp.) veneers. International Journal of Adhesion & Adhesives, 2011, Vol. 31, p. 164-167.
6. Colorado Master Gardeners Program, Mulching with Wood/Bark Chips. Grass Clippings, and Rock, Colorado State University Extension. 2009.
7. Harkin J.M., Rowe J.W. Bark and its possible uses. Research note FPL, 1971, 091, 56 p.
8. Pedieu R., Riedl B., Pichette A. Properties of mixed particle boards based on white birch (Betula papyrifera) inner bark particles and reinforced with wood fibres. Eur. J. Wood Prod., 2009, Vol. 67, pp. 95-101.
9. Ragland K.W., Aerts D.J., Baker A.J. Properties of Wood for Combustion Analysis. Bioresource Technology, 1991, Vol. 37, pp. 161-168.
10. Skogsberg, K., Lundberg A. Wood chips as thermal insulation of snow. Cold Regions Science and Technology, 2005, Vol. 43, pp. 207- 218.
11. Sopp L., Kolozs L. Fatömeg-számítási táblázatok [Wood volume tables]. Budapest: Állami Erdészeti Szolgálat, 2000. - pp. 24-27.
12. Pásztory Z., Mohácsiné I. R., Gorbacheva G.A., Börcsök Z. The utilization of tree bark. BioResources, 2016, 11(3), pp. 7859-7888.
