20.500.12556/RUL-154538 Effect of thermal modification of wood on the rheology, mechanical properties and dimensional stability of wood composite filaments and 3D-printed parts This study investigates the effects of thermal modification (TM) on wood-filled polylactic acid composite filaments for 3D printing. Nine composite formulations with different wood content were analysed. The wood particles came from unmodified and thermally modified beech wood (180 °C or 200 °C). The results showed that the incorporation of thermally modified (TMd) wood changed the filament properties, resulting in lower density and reduced surface roughness. The 3D-printed parts with TMd wood particles had a higher water contact angle, higher storage modulus, lower glass transition temperature, higher modulus of elasticity and higher indentation hardness. However, the tensile strength of the 3D-printed parts decreases, even though the results of parts with TMd wood showed higher strength compared to unmodified wood at the same filler content. Surprisingly, TMd wood had no effect on water absorption under humid conditions. Scanning electron micrographs showed improved interfacial adhesion between TMd wood particles and PLA, with smaller voids in the filament compared to filaments with unmodified wood particles. The study suggests that further research into use of TMd wood particles in composite holds promise for environmentally friendly 3D printing materials with favourable thermal and mechanical properties, impacting the expanding market for sustainable solutions in 3D printing. wood-polylactic acid composite 3D printing thermally modified wood dimensional stability mechanical properties les-PLA kompozit 3D tisk termično modificiran les dimenzijska stabilnost mehanske lastnosti true false true Angleški jezik Slovenski jezik Članek v reviji 2024-02-20 12:23:50 2024-02-20 12:23:53 2024-11-28 04:02:40 0000-00-00 00:00:00 2024 0 0 Str. 1251–1265 no. 6 Vol. 19 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*8 1748-0280 10.1080/17480272.2024.2316740 186147843 Effect_of_thermal_modification_of_wood_on_the_rheology__mechanical_properties_and_dimensional_stability_of_wood_composite_filaments_and_3D-printed_pa.pdf Effect_of_thermal_modification_of_wood_on_the_rheology__mechanical_properties_and_dimensional_stability_of_wood_composite_filaments_and_3D-printed_pa.pdf 1 B5A2E0CA2E21EA676AF7EBF21974C251 efc551d35119e67745594b0dcfb8300f609a3c9b80c2967e038257515ee6da71 d8ff41ae-acaf-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=196277 https://www.tandfonline.com/doi/full/10.1080/17480272.2024.2316740 1 87fe844a-cfe2-11ee-bb9e-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=181028 Biotehniška fakulteta 0 0 0