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
2022-08-19 03:46:44
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