20.500.12556/RUL-128904 Particleboards with partially liquefied bark of different particle sizes This paper presents a novel method of partially liquefying bark sawmilling waste for use in making particleboards. Maritime pine (Pinus pinaster Ait.) bark of different particle sizes (fine, medium, coarse, and mixed) was partially liquefied in the presence of ethylene glycol as a solvent and sulphuric acid as a catalyst at 180°C for 30 minutes. Single-layer particleboards were prepared by mixing partially liquefied bark (PLB) and wood chips at a ratio of 0.25 with no adhesives (group A) and at ratios of 0.25 or 0.1 with melamine-urea-formaldehyde (MUF) adhesives for additional bonding (groups B and C respectively). Mechanical and physical properties of the particleboards were tested according to European standards. The results showed that the boards in group A had lower densities, inferior mechanical properties and higher moisture content than those in groups B and C. Bark particle size had a significant effect on the mechanical properties of particleboards within each group. Additional MUF bonding and avoidance of coarse bark particles had a positive effect on mechanical properties. The thickness swelling (TS) and water absorption (WA) values of MUF-bonded boards were lower than those of boards without MUF, and greater addition of PLB produced particleboards with better water resistance. Bark particle size was not as critical for TS and WA as for mechanical properties. The overall results suggested using a bark particle size of < 2 mm for further studies. skorja etilen glikol utekočinjenje MUF lepilo vlaknene plošče Pinus pinaster Ait. bark ethylene glycol liquefaction maritime pine MUF resin particleboard true false true Angleški jezik Angleški jezik Neznano 2021-08-13 11:48:58 2021-08-13 11:49:00 2022-09-07 04:17:33 0000-00-00 00:00:00 2021 0 0 Str. 43-57 no. 207 Vol. 64 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*8 1644-3985 10.12841/wood.1644-3985.363.10 70741507 RAZ_Jiang_Wen_2021.pdf RAZ_Jiang_Wen_2021.pdf 1 A822E481DB9582573593061FF214DEA3 cc06c5696c59916d494ddaade75fa26aa0562f6d677e34f76233ea58687d3f96 68eeb880-fc1e-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145810 Biotehniška fakulteta 0 0 0