Abstract
A composition for impregnation of birch and pine wood was developed. The impregnation of samples 20x20 mm in size and 10 mm in length along the wood fibers was realized by the “hot-cold bath” method at 120oC for 40 min. The efficiency of impregnating composition was evaluated according to physical parameters: water absorption, swelling in tangential and radial directions. It was found that impregnation of birch and pine wood with spent engine oil (SEO) allows improving the antiseptic properties and water resistance of wood and, hence, to decrease the water absorption and swelling of the wood of these species. To enhance the effect of hydrophobization of wood, inorganic (aerosol, clinoptilolite) and organic (oak bark flour) fillers (0.5; 1; 2%) were added to SEO. A non-linear dependence of the wood characteristics on the filler content in impregnating composition was observed. The addition of organic filler was more effective in improving the water resistance of wood as compared to inorganic ones. The impregnating composition with 1% of oak bark flour revealed the highest wood water absorption indicators, as a result, the present organic filler is the most promising in abatement of water absorption and swelling. The analysis of biostability of the samples allows us to ascertain that there is no biological damage in the impregnated wood. The present research illustrated that the use of SEO as a matrix for impregnation of birch and pine wood may partially solve the problem of its utilization, thereby creating the possibility of resource saving. The use of oak bark flour as a filler solves another problem – the obtaining of an effective and environmentally friendly impregnating composition.
Highlights
The wood remains one of the most affordable and environmentally friendly materials widely used in various industries and in everyday life [1]
It was found that impregnation of birch and pine wood with spent engine oil (SEO) allows improving the antiseptic properties and water resistance of wood and, to decrease the water absorption and swelling of the wood of these species
It has been found that impregnation of birch and pine wood by spent engine oil made it possible to impart improved antiseptic properties and water resistance, decreasing water absorption and swelling of wood of these species
Summary
The wood remains one of the most affordable and environmentally friendly materials widely used in various industries and in everyday life [1]. The hydrophilicity of wood restricts the areas of its application. The presence of a variety of hydrophilic cavities and vessels in wood structure determines its hygroscopicity, and as a result, its swelling, cracking and changing the shape of product parts [2]. Birch wood refers to soft, diffuse vascular deciduous species. By contact with water birch wood starts decaying and this is inevitable during its exploitation. It refers to impregnated wood species [1]. The main difference between pine and birch is the presence of resin ducts in its structure. The wood of pine is subjected to rotting, which is its essential disadvantage
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