Performance Characteristics of Wood-Polymer Composites Based on Acetylated Wood Filler. P. 147–158

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UDС

691.11

DOI:

10.37482/0536-1036-2024-4-147-158

Abstract

The demand for composite materials is growing every year. In this regard, the competitiveness of a particular product is determined primarily by the price-quality ratio. The most rational option for the production of wood-filled composites is using the materials with the increased performance characteristics. To date, it is the performance characteristics of modern composite materials that are the most significant, not only for final consumers, but also for manufacturers. In this regard, to improve performance characteristics in the production of wood-filled composites, various methods of pre-treatment of wood are used – thermal modification, acetylation, furfulation, ultra-high-frequency processing, alkali treatment, the use of various additives, etc. A promising way to improve the physical and mechanical properties of wood-filled materials is acetylation, whose mechanism consists in the formation of acetyl groups in wood during processing. To reduce production costs and the cost of the final product, it is possible to use a cheaper precursor (for example, icy acetic acid instead of acetic anhydride) with the possibility of intensifying the impregnation process. This article presents the results of obtaining wood-filled composites based on acetylated birch wood flour with its various proportions in the composition. The effect of introducing acetylated wood filler into the composition on the performance properties of composites (abradability, frost-resistance, flexural strength) has been evaluated in comparison with control samples made from untreated birch wood flour. The effect of acetylation with glacial acetic acid on the structure of birch wood flour has been characterized using Fourier-transform infrared spectroscopy. The IR-spectra of the control and acetylated samples contain absorption bands belonging to the corresponding groups of cellulose and lignin of hardwoods. The abradability and frost-resistance coefficients for a wood-filled composite based on acetylated birch wood flour are on average 1.5–2 times lower for all compositions compared to control samples. The results of the research allow us to conclude that acetylation of wood flour as a method of pre-treatment of the filler in order to improve the performance characteristics of the final product is promising for implementation in the production of wood-filled materials.

Authors

Anatoliy А. Prokopiev*, Postgraduate Student; ResearcherID: HTM-4658-2023, ORCID: https://orcid.org/0009-0008-8106-364X
Nour R. Galyavetdinov, Candidate of Engineering, Assoc. Prof.;
ResearcherID: Н-8681-2016, ORCID: https://orcid.org/0000-0003-4360-7112
Ruslan R. Safin, Doctor of Engineering, Prof.; ResearcherID: О-9355-2015, ORCID: https://orcid.org/0000-0002-0226-4232

Affiliation

Kazan National Research Technological University, ul. K. Marksa, 68, Kazan, 420015, Russian Federation; prokopev.anatolij@mail.ru*, nour777@mail.ru, cfaby@mail.ru

Keywords

wood flour, acetylation, glacial acetic acid, wood-filled composite, IR-Fourier spectroscopy, ultimate flexural strength, abradability, frost-resistance

For citation

Prokopiev A.A., Galyavetdinov N.R., Safin R.R. Performance Characteristics of Wood-Polymer Composites Based on Acetylated Wood Filler. Lesnoy Zhurnal = Russian Forestry Journal, 2024, no. 4, pp. 147–158. (In Russ.). https://doi.org/10.37482/0536-1036-2024-4-147-158

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