Influence of natural composite materials on mechanical properties of wood
Sviatoslav Homon, Tetiana Dovbenko, Valentin Savitskiy, Mykola Khoruzhyi, Oleksiy Petrenko, Pavlo Sunak, Dmytro Y. Kysliuk
Abstract
A physical method for wood modification using an autoclave system in a “pressure-vacuum” mode is proposed, involving the application of linseed oil with prior impregnation with a complex additive of tar oil and boric acid. Experimental studies of solid and modified pine, spruce, and birch wood under axial compression along the fibers were carried out. The optimal parameters of pressure (1.5 MPa) and temperature (90°C) were determined, under which the samples achieved the highest physical and mechanical properties. The ultimate strength of the modified wood, compared to wood at a standard moisture content of 12%, under optimal modification conditions increased by 27.7% for pine samples, 20.3% for birch, and 26.1% for spruce. The curing time of the composite material was reduced from 7 days to 1 day.