Veneration of thermomodified veneer for the protection of wood virobies type of curry
Keywords:
wood, veneer, thermal modification, modification efficiency, waterproofing, durability of woodAbstract
The analysis of the process of thermal modification of wood was carried out and it was found that the treatment causes chemical changes in the structures of wood components (lignin, cellulose and hemicellulose). It has been proven that the thermal modification process causes the decomposition of hemicelluloses and the amorphous part of cellulose, reduces water absorption, and reduces the amount of substances that are a breeding ground for fungi, which leads to increased durability. In addition, lignin and the resulting pseudolignin undergo polymerization and redistribution throughout the cell volume, giving the cell walls greater density, hardness, and increased hydrophobicity (water repellency), thereby reducing their ability to absorb moisture and swell. It was determined that the oak veneer samples gained the most moisture from the environment in the first two days. The weight of unmodified veneer increased by 0.06 g, and similar results were shown by veneer modified at lower temperatures. The thermally modified veneer at 250 °C for 20, 30 minutes and at 280 °C gained 2 times less weight in the first two days - 0.03 g. Over the next 11 days, the control samples gained another 0.09 g, slightly less for samples modified at 160 °C, and modified at 220 °C and above ‒ no more than 0.03 g. Experimentally, it was found that compared to unmodified veneer, which gained 22.41 % moisture in two weeks, veneer modified at 250 and 280 °C gained 2.5 times less moisture – an average of 8.6 %. It was found that as the modification temperature increases to 280 °C, water absorption decreases more than twice. The results of the research will also allow us to target further tasks to create new methods of thermal modification of wood and its operating conditions at various facilities. The results of the research will also allow us to target further tasks to create new methods of thermal modification of wood and its operating conditions at various facilities.
References
Lo Monaco А., Pelosi C., Agresti G., Picchio R., Rubino G. Influence of thermal treatment on selected properties of chestnut wood and full range of its visual features. Drewno. 2020. Vol. 63 (205). Р. 5-24.
Tsapko Yu., Tsapko A., Bondarenkо O. Determination of the laws of thermal resistance of wood in application of fire-retardant fabric coatings. Eastern-European Journal of Enterprise Technologies. 2020. Vol. 2/10 (104). Р. 13-18. DOI: 10.15587/1729-4061.2020.200467.
Tsapko Y.V., Tsapko A.Yu., Bondarenko O.P., Sukhanevych M.V., Kobryn M.V. Research of the process of spread of fire on beams of wood of fire-protected intumescent coatings. IOP Conference Series: Materials Science and Engineering. 2019. Vol. 708. 012112. DOI: https://doi.org/10.1088/1757-899x/708/1/012112.
Tsapko Yu., Tsapko А., Bondarenko O. Establishment of heat-exchange process regularities at inflammation of reed samples. Eastern-European Journal Enterprise Technologies. 2019. Vol. 1. No 10 (97). Р. 36-42. DOI: 10.15587/1729-4061.2019.156644.
Цапко Ю.В., Ломага В.В., Цапко О.Ю. Вогнезахист деревини органо-неорганічними композиціями: монографія. Київ: ФОП Ямчинський О.В. 2023. 160 с.
Humar M., Lesar B., Kržišnik D. Moisture Performance of Façade Elements Made of Thermally Modified Norway Spruce Wood. Forests. 2020. Vol. 11 (3). No 348. DOI: 10.3390/f11030348.
Esteves В., Pereira H. Wood modification by heat treatment. A review. Bioresources. 2009. Vol. 4 (1). Р. 370-404.
Humar M., Repič R., Kržišnik D., Lesar B. Quality Control of Thermally Modified Timber Using Dynamic Vapor Sorption (DVS) Analysis. Forests. 2020. Vol. 11 (6). DOI: 10.3390/f11060666.
Aytin S., Korkut Р. Effect of thermal treatment on the swelling and surface roughness of common alder and wych elm wood. Journal of Forestry Research. 2016. Vol. 27 (1). Р. 225-229.
Pelosi G., Agresti L., Lanteri R., Picchio Е., Gennari E., Lo Monaco A. Artificial Weathering Effect on Surface of Heat-Treated Wood of Ayous (Triplochiton scleroxylon K. Shum). The 1st International Electronic Conference on Forests (IECF). 2020. URL: https://sciforum.net/conference/IECF2020.
Ugovšek B., Šubic G., Humar M., Lesar B., Thaler N., Brischke C., Jones D., Lozano J.I. Performance of Windows and façade elements made of thermally modified Norway spruce (Picea abies) in different climatic conditions. In Proceedings of the WCTE 2016. World Conference on Timber Engineering. 2016.
Ugovšek B., Šubic G., Starman J. et al Short-term performance of wooden windows and facade elements made of thermally modified and non-modified Norway spruce in different natural environments. Wood Material Science and Engineering. 2019. Vol. 14. Р. 42-47.
Bonifazi G., Serranti S., Capobianco G., Agresti G., Calienno L., Picchio R., Lo Monaco A., Santamaria U., Pelosi C. Hyperspectral imaging as a technique for investigating the effect of consolidating materials on wood. Journal of Electronic Imaging. 2017. Vol. 26 (1). 011003.
Jones D., Sandberg D., Goli G., Todaro L. Wood Modification in Europe: a state-of-the-art about processes, products and applications. Firenze University Press, 2019. URL: https://www.diva-portal.org/smash/get/diva2:1539405/FULLTEXT01.pdf
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
