Design of an Eco-Friendly Lubricant Using COSMO-RS Screened Ionic Liquid
Yuvatharshini V. ARUMUGAM, Asiah Nusaibah MASRI, Izni Mariah IBRAHIM, Azad Anugerah ALI RASOL
Abstract. Biolubricants derived from palm oil face challenges such as poor thermal and oxidative stability, limiting their industrial applications. Additives such as ionic liquids (ILs) can enhance the performance of these biolubricants. The structure, molecular weight, and functional groups of ILs influence key properties including solubility, viscosity and density. This study aims to develop a green thermally stable lubricant by screening suitable ILs as additive in palm oil. COSMO-RS computational model was used to predict their solubility in methyl palmitate ester based on activity coefficients. However, some predicted do not align with experimental results due to differences in intermolecular interaction which are acceptable within the expected limitations of the COSMO-RS model. Guanidinium-based ILs with fatty acid anions demonstrated the highest solubility. The length of alkyl chain and molecular weight significantly affected compatibility, highlighting the importance of molecular design. This work provides a theoretical basis and practical approach for formulating eco-friendly lubricants with enhanced performance, contributing to sustainable lubrication solutions in industry.
Keywords
Biolubricant, Ionic Liquid, Lubricant Additive, COSMO-RS, Eco-Friendly
Published online 5/10/2026, 16 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Yuvatharshini V. ARUMUGAM, Asiah Nusaibah MASRI, Izni Mariah IBRAHIM, Azad Anugerah ALI RASOL, Design of an Eco-Friendly Lubricant Using COSMO-RS Screened Ionic Liquid, Materials Research Proceedings, Vol. 66, pp 64-79, 2026
DOI: https://doi.org/10.21741/9781644904152-8
The article was published as article 8 of the book Advanced Materials and Sustainable Energy Technologies
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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