20.500.12556/RUL-106734 Adsorption of alcohols and fatty acids onto hydrogenated (a-C:H) DLC coatings Information about the interactions between lubricants and DLC coatings is scarce, despite there having been many studies over the years. In this investigation we used ToF-SIMS, XPS and contact-angle analyses to examine the adsorption ability and mechanisms with respect to two oiliness additives, i.e., hexadecanol and hexadecanoic acid, on an a-C:H coating. In addition, we analyzed the resistance of the adsorbed films to external influences like solvent cleaning. The results show that both molecules adsorb onto surface oxides and hydroxides present on the initial DLC surface and shield these structures with their hydrocarbon tails. This makes the surfaces less polar, which is manifested in a smaller polar component of the surface energy. We also showed that ultrasonic cleaning in heptane has no significant effect on the quantity of adsorbed molecules or on their chemical state. This not only shows the relatively strong adsorption of these molecules, but also provides useful information for future experimental work. Of the two examined molecules, the acid showed a greater adsorption ability than the alcohol, which explains some of the previously reported better tribological properties in the case of the acid with respect to the alcohol. DLC coatings adsorption alcohols fatty acids ToF-SIMS XPS wetting mazanje alkohol adsorpcija DLC prevleke true false true Angleški jezik Slovenski jezik Članek v reviji 2019-03-14 11:35:01 2019-03-14 11:35:04 2025-03-04 11:32:37 0000-00-00 00:00:00 2016 0 0 Str. 466-476 Vol. 363 Feb. 2016 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2020-02-28 539.92(045) 0169-4332 10.1016/j.apsusc.2015.12.066 14399003 3283215 RAZ_Simic_Rok_i2016.pdf RAZ_Simic_Rok_i2016.pdf 1 4A618961CB9AABB3D141D7AA69FC717D 4af7e70956df40185624292d94920415c31c07389c01f9217458d0b0d492d60e 5dca4040-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=117505 https://www.sciencedirect.com/science/article/pii/S0169433215030718?via%3Dihub 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=117504 Fakulteta za strojništvo 0 0 0