The effect of particle board industry waste tar on the physical and biological durability of wood

This manuscript investigated the effect of waste tar from particle board factories on some physical and biological resistance properties of Scots pine (Pinus sylvestris L.) and beech (Fagus orientalis L.) woods. Solutions were prepared by dissolving waste tar in ethanol:toluene (1v:1v) in concentrations of 5%, 10%, 15% and 20% and treated under vacuum and pressure. In addition, surface coating (SC) was applied by spreading 96% waste tar on the wood surfaces after treatment. Deep-treated and surface-coated (DT+SC) wood samples were exposed to the wood-decay fungi (Corillous versicolor L. and Neolentinus lepideus Fr.) and wood destroying house borer (Hylotrupes bajulus L.) larvaes. Total phenolic content, water uptake, water-repellent efficiency and surface contact angle were tested. The highest mean weight loss (45.23%) was found in the beech wood control samples exposed to C. versicolor. Beech samples deep-treated with a 20% concentration and surface treatment (DT+SC) yielded a mass loss of 14.03%. The H. bajulus larvae mortality rate was found to be 80% in the Scots pine wood samples deep-treated with 20% waste tar. The deep treatment with the waste tar solution significantly increased the surface contact angle values of the Scots pine wood, thereby significantly reducing the wettability of the wood compared to the untreated control samples.

本研究探讨了刨花板厂废弃焦油对欧洲赤松（Pinus sylvestris L.）和东方山毛榉（Fagus orientalis L.）木材部分物理及抗生物侵害性能的影响。实验将废弃焦油溶解于体积比1:1的乙醇-甲苯混合溶剂中，配置成浓度分别为5%、10%、15%和20%的处理液，随后采用真空加压法对木材进行浸渍处理。此外，在浸渍处理完成后，于木材表面涂刷96%浓度的废弃焦油，完成表面涂层（SC）处理。将经深层浸渍+表面涂层（DT+SC）复合处理的木材试样，分别置于两种木材腐朽真菌——彩绒革盖菌（Corillous versicolor L.）和红缘层孔菌（Neolentinus lepideus Fr.），以及家天牛（Hylotrupes bajulus L.）幼虫的侵害环境中。随后对试样的总酚含量、吸水量、拒水效率及表面接触角进行了测试表征。实验结果显示，暴露于彩绒革盖菌环境中的东方山毛榉空白对照组试样，平均失重率最高，达45.23%。经20%浓度浸渍+表面涂层复合处理的东方山毛榉试样，失重率仅为14.03%。经20%废弃焦油深层浸渍处理的欧洲赤松试样，其家天牛幼虫死亡率可达80%。废弃焦油溶液深层浸渍处理可显著提升欧洲赤松木材的表面接触角，相较于未处理的空白对照组，试样的润湿性得到显著降低。