Tribological Properties Of Palm Oil Mixed With Hexagonal Boron Nitride (HBN) Nanoparticles

Jamallulil, Arina Dayana (2019) Tribological Properties Of Palm Oil Mixed With Hexagonal Boron Nitride (HBN) Nanoparticles. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Friction and wear are unavoidable in engineering applications. One of the common solutions to overcome these problems is by using a lubricant. Vegetable oils have been considered as potential candidates in recent years of lubrication development to improve overall tribological performance compared to mineral oils. The purpose of this study is to investigate the effect of different hexagonal boron nitride nanoparticles compositions on the tribological properties of palm oil. These palm oil were blended with various concentrations of hBN nanoparticles, ranging from 0.1 vol.% to 0.5 vol.%. Tribological testing was performed using a four-ball tester according to the standard of ASTM D4172 procedures. It was observed that addition of nanoparticle additives in palm oil showed better lubricating characteristics than pure oil. A further improvement on the addition of nanoparticles was also obtained, wherein it was observed that 0.5 vol.% concentration of nanoparticles exhibit minimum wear rate. The wear rate value of concentration 0.1 vol.% hBN reduced by approximately 10%, in comparison to the pure oil. However, increase percentage concentration of hBN resulted in higher coefficient of friction due to the agglomeration effect of hBN nanoparticles in palm oil. SEM analysis of the worn out samples was carried out to examine the topography of worn surface and EDX elemental mapping shows the elements distribution of boron and nitrogen on the worn surface. 0.5 vol.% hBN has higher distribution for both main element in boron nitride compared to 0.3 vol.% hBN, thus exhibit agglomeration effect.

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