The present invention refers to a lubricant additive, which is intended for lubricating of at least two steel machine parts, which are engaged with each other by means of sliding or rolling relative to each other, and moreover also to a lubricant containing such additive. A chemical structure of such additive is based on a linear molecule of alkane with preferably 10 to 20 carbon atoms, in which all hydrogen atoms, or all hydrogen atoms except of the terminal one, which is bound to the terminal carbon atom, are substituted with a fluorine atom or with such functional group on the basis of fluorine, which leads to oleophobicity of such substituted molecule, and wherein simultaneously at least one polar functional group is bound to at least one terminal carbon atom in order to assure adhesiveness of the additive towards the iron oxides on the surface of each lubricated machine part by simultaneously enabling sliding along the surface of the said machine part.
F.33 Slovenian patent
COBISS.SI-ID: 12214555DLC coatings possess some properties that may be beneficial or may even enable new green lubrication technologies without using strong additives relying on chemical-based performance, which are typical for heavy-loaded metallic surfaces and critically affect also environmental emissions. In this work we present some of various potential strategies that may be used to design green lubrication through the use of DLC coatings in combination with various lubrication techniques and technologies. We present and discuss potential approaches through predominantly chemical-based interactions, for example using conventional aditives, but with ambition to use milder additives with more environmental-adapted chemistry, physical-based lubrication technologies by employing self-lubricating nanoparticles, and an approach that benefits from a combination of physical and chemical interactions that are based of particular solid-liquid interface design, such as wetting and surface energies rather than conventional additives.
B.04 Guest lecture
COBISS.SI-ID: 12751643A tuning interaction on the solid-liquid interface in order to control tribological performance of lubricated contacts is a novel approach in design of lubricated contacts. This is important due to the fact that effect such as viscous friction in lubricated contacts can be reduced with proper design of solid-liquid interface. While most of common lubricated contacts operates majority of time in hydrodynamic regime, where viscous friction is the main reason for energy loss, the role of solid-liquid interfacial interactions is significant. Achived reduction in coefficient of friction up to over 30%, as it was recently reported by our group, that is result only of tunning solid-liquid interfacial effects such as wetting and solid-liquid slip, is significant, especially because it is achived witout usage of additives that are commonly used in oils to reduce friction and wear.
B.04 Guest lecture
COBISS.SI-ID: 12732187M. Kalin, Solid liquid Biphase lubricating coatings. in: WANG, Qian (ed.), CHUNG, Yipwah (ued.). Encyclopedia of tribology. New York [etc.]: Springer, 2013, 32133224. Currently, one of the most important tribology monographs: Encyclopaedia of Tribology (Springer Verlag), in which Prof. Kalin was invited to contribute a chapter based on his recent studies related to special strategies of solidliquid interface design for carbonbased coatings under biphase boundary lubrication. The section deals with combination of effects arising from the physical properties of the lubricant, surface energy of coatings and corresponding wetting and slip phenomena at the interface.
C.01 Editorial board of a foreign/international collection of papers/book
COBISS.SI-ID: 13315867In 2012, dr. Kalin was elected as Editor in chief of Lubrication Science (Wiley), which is the only journal specialised in lubrication having SCI impact factor. After 20 years, he succeeded in this position prof. H. Spikes (Imperial College London), one of the most respected tribologists worldwide. With this, dr. Kalin became one of just few most respected journals in the field of tribology, suggesting his wellestablished reputation and importance of his work.
C.04 Editorial board of an international magazine