20.500.12556/RUL-165220 Tribological performance of fatty acid, acid/amine additive mixture and ionic liquid Bio-based materials have attracted great attention from industry and academia in tribology because they are renewable, bio-degradable and easily accessible. This study aims to evaluate the efficiency of bio-based materials used both as neat lubricants and additives on friction and wear performance. The evaluated lubricants include oleic acid, a mixture containing oleic acid and dodecyl amine in hexadecane and a neat ionic liquid composed of oleic acid and dodecyl amine. The influence of the additive concentration, ratio between acid and amine, and oscillation frequency under reciprocating contacts has been investigated. Surface analysis was conducted by optical microscope, scanning electron microscopy and energy-dispersive X-ray spectroscopy, and time-of-flight secondary ion mass spectrometry. The results confirm that a small amount of oleic acid as an additive can provide limited friction reduction. Bio-based ionic liquid shows the lowest friction and wear coefficient in all testing conditions. A synergistic effect between oleic acid and dodecyl amine as an additive mixture has been observed when the two components are equimolar and the oscillating frequency is high. Time-of-flight secondary ion mass spectrometry analysis of the wear track indicates that the tribological process enhances the ionic character of the additive mixture, improving the lubrication performance. bio-based material friction wear additive mixture ionic liquid material na biološki osnovi trenje obraba mešanica dodatkov ionska tekočina true false true Angleški jezik Slovenski jezik Članek v reviji 2024-11-27 09:41:32 2024-11-27 09:41:34 2025-02-10 10:24:11 0000-00-00 00:00:00 2024 0 0 Str. 1320-1334 iss. 10 Vol. 238 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.92 2041-305X 10.1177/13506501241251524 196287235 shu-et-al-2024-tribological-performance-of-fatty-acid-acid-amine-additive-mixture-and-ionic-liquid.pdf shu-et-al-2024-tribological-performance-of-fatty-acid-acid-amine-additive-mixture-and-ionic-liquid.pdf 1 A148D6B0A36C3E42269828949DD627A3 ef04da76bd557fdccf8436c4911aae722ece1b3cc733661c3326d951cbcf6f94 b996925a-c856-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197769 https://journals.sagepub.com/doi/full/10.1177/13506501241251524 1 ff0d5539-ac9a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=196258 Fakulteta za strojništvo 0 0 0