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Investigation of technological mode of wood modification by polymer composition with carbon filler

https://doi.org/10.21266/2079-4304.2024.248.257-273

Abstract

The investigated technology of modifying wood with a polymer compound with a carbon filler makes it possible to improve the quality of products and increase the strength properties of wooden structures. For wood modification, a polymer composition was used, including a resin – dimethacrylic polyester, a hardener – methyl ethyl ketone peroxide, an accelerator – cobalt octoate, a nanostructural additive – nanotubes «Taunit- M», a surfactant. The technology of modifying wooden structures consists in pumping a polymer composition with a carbon filler under excessive pressure of pulsed action. The mode of modification of wood by polymer composition (10-5-10-5-10 min) has been experimentally established: for 10 minutes, the sample was injected with a polymer compound, then the sample «rested» for 5 minutes, then the injection of the polymer composition was repeated for 10 minutes. To carry out work on the modification of the turbine, a mobile installation was used, including a container, a compressor, a trolley, an electronic control unit, a pressure sensor, a reinforced hose, and connectors. The vacuum rotary pump for wood modification is designed to create and maintain residual pressure during wood modification by the overpressure method. A scheme of zonation and topography of holes for injection of polymer composition was proposed and justified. Based on the ability to absorb wood of the polymer composition, the pitch of the injectors was experimentally determined 200 mm. According to the results of microscopy, a systematic introduction of the polymer composition into the wood structure was established, while the density of the modified wood increased by 34%. To assess the strength properties of the modified wood, compression tests were performed on standard samples selected from the structure. The test results showed an increase in the tensile strength of modified wood compared to conventional wood by 39.69% and a decrease in deformability by 7.7%.

About the Authors

M. V. Lukin
Vladimir State University named after A.G. and N.G. Stoletov
Russian Federation

Lukin Mihail V. – PhD (Technical), Associate Professor of the Department of Building Structures,

600000. Gorkogo str. 87. Vladimir



D. A. Chibrikin
Vladimir State University named after A.G. and N.G. Stoletov
Russian Federation

Chibrikin Danila A. – PhD (Technical), Associate Professor of the Department of Building Structures,

600000. Gorkogo str. 87. Vladimir



V. A. Martynov
Vladimir State University named after A.G. and N.G. Stoletov
Russian Federation

Martynov Vladislav A. – Assistant of the Department of Building Structures, A.G. and N.G.,

600000. Gorkogo str. 87. Vladimir



O. A. Kunitskaya
Arctic State Agrotechnological University
Russian Federation

Kunitskaya Olga A. – DSc (Technical), Professor of the Department «Technology and Equipment of the forest complex»,

677008. Sergelyakhskoye sh. 3 km. 3. Yakutsk



A. V. Teppoev
St.Petersburg State Forest Technical University
Russian Federation

Teppoev Aleksei V. – PhD (Technical), Associate Professor, Head of the Department of Automation, Metrology and Control of technical systems,

194021. Institutskiy lane. 5. St. Petersburg



S. I. Roshchina
Vladimir State University named after A.G. and N.G. Stoletov
Russian Federation

Roshchina Svetlana I. – DSc (Technical), Professor of the Department of Building Structures,

600000. Gorkogo str. 87. Vladimir



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Review

For citations:


Lukin M.V., Chibrikin D.A., Martynov V.A., Kunitskaya O.A., Teppoev A.V., Roshchina S.I. Investigation of technological mode of wood modification by polymer composition with carbon filler. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2024;(248):257-273. (In Russ.) https://doi.org/10.21266/2079-4304.2024.248.257-273

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ISSN 2079-4304 (Print)
ISSN 2658-5871 (Online)