Establishment of patterns in the thermal modification of dry pine wood

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.285509

Keywords:

dry pine wood, thermal modification, change in wood structure, strength limit

Abstract

One of the methods of ensuring the durability of dry wood during operation is its thermal modification, which inhibits the life processes of the fungus of the Ceratostomaceae family and leads to a change in its structure and properties. Therefore, the object of research was thermally modified dry pine wood affected by a fungus of the Ceratostomaceae family. Physicochemical studies of changes in the structure of thermally modified dry pine wood showed that the samples have absorption spectra that are characterized by fluctuations of the glucopyranose ring of cellulose and are an indicator of the beginning of destructive processes. At the same time, the data of thermogravimetric analysis show the processes of water loss and decomposition of hemicellulose, cellulose, and lignin, and burning of coke residue. Bending and compressive strength of thermally modified dry pine wood shows that as the wood dries, the strength limit decreases depending on the degree of fungus damage. Namely, with an area of biological damage within 10 %, the strength limit is reduced by more than 1.2 times when modified at 200 °С/3 hours, by more than 1.9 times at 200 °С/6 hours. With an increase in the degree of fungal damage to 30÷50 %, the strength limit decreases by more than 1.6 times when modified at 200 °С/3 hours, by more than 2.1 at 200 °С/6 hours. And when affected by a fungus in the range of 80÷100 %, the wood becomes softer, more plastic, while the bending strength is reduced by 1.7 times, and the compressive strength by 1.16 times. Thermal modification of dry pine wood at 200 °С for 3 hours reduces the level of water absorption by more than 1.5 times, and for 6 hours ‒ by more than 1.7 times. The practical importance is that the results of determining changes in the structure and properties of thermally modified dry pine wood make it possible to establish the scope and conditions of its application

Author Biographies

Yuriy Tsapko, National University of Life and Environmental Sciences of Ukraine

Doctor of Technical Sciences, Professor

Department of Technology and Design of Wood Products

Oleksandra Horbachova, National University of Life and Environmental Sciences of Ukraine

PhD, Associate Professor

Department of Technology and Design of Wood Products

Ruslan Likhnyovskyi, Institute of Public Administration and Research in Civil Protection

PhD

Research and Testing Center

Serhii Mazurchuk, National University of Life and Environmental Sciences of Ukraine

PhD, Associate Professor

Department of Technology and Design of Wood Products

Аleksii Tsapko, Ukrainian State Research Institute "Resurs"

PhD, Senior Research Fellow

Department of Research on Quality and Storage Conditions of Petroleum Products and an Industrial Group of Goods

Nataliia Buiskykh, National University of Life and Environmental Sciences of Ukraine

PhD

Department of Technology and Design of Wood Products

Andrii Matviichuk, V. I. Vernadsky National Library of Ukraine

PhD

Oksana Slutska, Institute of Public Administration and Research in Civil Protection

PhD

Research Center for Civil Protection

Olena Korolova, Institute of Public Administration and Research in Civil Protection

PhD, Associate Professor

Department of Technical Regulation

Fire Protection Research Center

Dmytro Khromenkov, Institute of Public Administration and Research in Civil Protection

Department of Technical Regulation

Fire Protection Research Center

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Establishment of patterns in the thermal modification of dry pine wood

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Published

2023-08-31

How to Cite

Tsapko, Y., Horbachova, O., Likhnyovskyi, R., Mazurchuk, S., Tsapko А., Buiskykh, N., Matviichuk, A., Slutska, O., Korolova, O., & Khromenkov, D. (2023). Establishment of patterns in the thermal modification of dry pine wood. Eastern-European Journal of Enterprise Technologies, 4(10 (124), 24–36. https://doi.org/10.15587/1729-4061.2023.285509

Issue

Vol. 4 No. 10 (124) (2023): Ecology

Section

Ecology

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Copyright (c) 2023 Yuriy Tsapko, Oleksandra Horbachova, Ruslan Likhnyovskyi, Serhii Mazurchuk, Аleksii Tsapko, Nataliia Buiskykh, Andrii Matviichuk, Oksana Slutska, Olena Korolova, Dmytro Khromenkov

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