20.500.12556/RUL-145601 Tribological behaviour of green wood-based unrecycled and recycled polypropylene composites In this study we evaluated the tribological performance of polypropylene composites with wood-flour fillers obtained as a by-product from the wood-processing industry, which were based on unrecycled and recycled polypropylene polymer matrices. The mechanical properties of polypropylene-wood composites with wood-filler loadings of 0–40 wt % were determined with tensile tests and their friction and wear behaviours were studied with dry reciprocating ball-on-disc sliding tests against 100Cr6 steel balls at room temperature. The addition of the wood fillers resulted in a significant improvement in the tribological performance compared to the neat, unrecycled, and recycled polypropylene materials: the friction coefficient decreased by up to 30%, while the wear resistance was improved by up to two orders of magnitude. While neat unrecycled polymers have better properties than recycled, addition of 40 wt % wood-filler content in both, recycled and unrecycled composites, resulted in almost the same level of coefficient of friction (∼0.25) and wear coefficient (2 × 10$^{−6}$ mm$^3$/(Nm) to 3 × 10$^{−6}$ mm$^3$/(Nm)). Even with the addition of as low as 5 wt % of wood fibres the wear resistance was improved for 63% and 43% for unrecycled and recycled composites, respectively, which indicates that the use of wood fillers could be a sustainable and cost-effective way to improve the polymer tribological performance, and could compensate for the normally poorer properties of recycled materials, making the recycled polypropylene-wood composites a suitable sustainable choice for tribological applications. wear polypropylene bio composite wood fillers recycling sustainability obraba polipropilen bio kompoziti lesna polnila recikliranje trajnost true false true Angleški jezik Slovenski jezik Članek v reviji 2023-04-25 13:51:45 2023-04-25 13:51:46 2023-10-24 03:30:28 0000-00-00 00:00:00 2023 0 0 8 str. Vol. 524/525, art. 204826 Jul. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.92:678.742.3 0043-1648 10.1016/j.wear.2023.204826 150403331 Jan_.._-_Tribological_behaviour_of_green_wood-based_unrecycled_and_recycled.pdf Jan_.._-_Tribological_behaviour_of_green_wood-based_unrecycled_and_recycled.pdf 1 26FCB97A3530918C3CA9C7CD757E1DD9 8a25605e4c286c621a00dc6c14130a38288ac7523004dfd3f7ab68e5d11a8d59 17248c3b-e360-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168537 https://www.sciencedirect.com/science/article/pii/S0043164823002090 1 5e9fdb8a-e35f-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=168536 Fakulteta za strojništvo 0 0 0