Physical and mechanical characteristics of wood-polymer composite material based on hydrolyzed wood
Abstract
The influence of the addition of high-pressure polyethylene (HDPE) particles on the physical and mechanical characteristics of the composite material obtained based on hydrolyzed pine wood was studied. Pre-treatment of wood chips was carried out by the method of explosive auto-hydrolysis. Samples of the composite material were obtained by hot pressing a mixture of dried hydrolyzed wood particles and HDPE particles without adding other binder components. It was found that the introduction of crushed HDPE in an amount of up to 5 mass parts. per 100 mass parts of hydrolyzed wood into the composition of the press mass leads to an exponential increase in the static bending strength of the composite material up to 15 % compared to the material without HDPE. In addition, the use of even an insignificant amount of HDPE increases the impact toughness of the composite material by at least 30 %. The use of HDPE in amounts exceeding 5 mass parts causes a smooth decrease in the static bending strength described by an inverse exponential law. It has been suggested that the decrease in strength is caused by a change in the nature of the interfacial interaction of the components of the press composition when large amounts of HDPE are used. It was also found that the addition of HDPE particles improves the hydrophobic characteristics of the composite material. Dependences of water absorption and swelling of the material on the amount of HDPE have inverse-exponential character within the most part of the HDPE particles application range. Compared with the control sample, water absorption and swelling in thickness can be reduced by 1.5 times.The use of HDPE in an amount not exceeding 1 mass fraction has no significant effect on the hydrophobic characteristics.
About the Authors
Yu. G. Skurydin
Altai State University
Russian Federation
Russian Federation
61, Lenin av., Barnaul, 656049
E. M. Skurydina
Altai State Pedagogical University
Russian Federation
Russian Federation
55, Molodezhnaya str., Barnaul, 656031
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For citations:
Skurydin Yu.G., Skurydina E.M. Physical and mechanical characteristics of wood-polymer composite material based on hydrolyzed wood. Conifers of the boreal area. 2022;40(4):324-332. (In Russ.)
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