Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant

Version 1 : Received: 6 October 2023 / Approved: 16 October 2023 / Online: 16 October 2023 (14:03:49 CEST)

How to cite: Szabó, Á. I.; Marsicki, M.; Hargitai, H. Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant. Preprints 2023, 2023100979. https://doi.org/10.20944/preprints202310.0979.v1 Szabó, Á. I.; Marsicki, M.; Hargitai, H. Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant. Preprints 2023, 2023100979. https://doi.org/10.20944/preprints202310.0979.v1

Abstract

In this article, copper(II) oxide and titanium dioxide nanoparticles were added to Group III base oil formulated with 8 wt% Komad 323 dispersant. The nanoparticles were treated with ethyl oleate surface modification. The tribological properties of the homogenized oil samples were tested on a linear oscillating tribometer with continuous monitoring of static friction. Friction absolute integral values were calculated from high data acquisition. The wear was evaluated using a digital optical and confocal microscope. The wear types were characterized with scanning electron microscopy, while the remaining additives were located and quantified with energy-dispersive X-ray spectroscopy. The measurement results show that the CuO nanoparticles did not work well with the Komad 323 dispersant. As a result of their antagonistic effect, in the case of low CuO concentrations (≤0.3 wt%), the friction increased, while in the case of high concentrations (≥0.4%), surface fatigue caused a high wear rate. The cooperation between TiO2 and the dispersant showed synergistic effects. The oxygen-rich boundary layer formed on the worn surface with a titanium content of 0.33-0.39 norm.wt% provides both lower friction and high wear resistance.

Keywords

oxides; nanoparticle; tribology; cupric oxide; titanium oxide; lubricant; dispersant

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

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