Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study

Superior tribological properties of mineral oil based nano-lubricants in boundary/thin film lubrication are well established. However, in view of the environmental aspects, vegetable oils are more preferable and studies are being carried out to evaluate the performance of vegetable oils when nanopar...

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Autores principales:	Chacko Preno Koshy, Perikinalil Krishnan Rajendrakumar, Manu Varghese Thottackkad
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	nano-lubricants surfactants thin film/boundary lubrication vegetable oils Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/9e067b27c86f412aa61b68a2d91a32d9
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spelling	oai:doaj.org-article:9e067b27c86f412aa61b68a2d91a32d92021-11-05T09:22:14ZAnalysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study1881-219810.2474/trol.10.344https://doaj.org/article/9e067b27c86f412aa61b68a2d91a32d92015-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/5/10_344/_pdf/-char/enhttps://doaj.org/toc/1881-2198Superior tribological properties of mineral oil based nano-lubricants in boundary/thin film lubrication are well established. However, in view of the environmental aspects, vegetable oils are more preferable and studies are being carried out to evaluate the performance of vegetable oils when nanoparticles are added to them. In this paper, behaviour of vegetable oils with the addition of Copper Oxide (CuO) nanoparticles is presented to evaluate their thermo-physical and tribological properties. Experimental studies at elevated temperatures are carried out on two base oils, viz., coconut and mustard oils as well as the nano-lubricants formulated from them by the addition of unmodified and surfactant-modified CuO nanoparticles separately. Enhancement of thermo-physical properties such as viscosity and fire-point is more pronounced for nano-lubricants containing surfactant-modified CuO nano-lubricants than the corresponding nano-lubricants containing unmodified CuO nanoparticles. Similar improvements in friction-reduction and anti-wear properties are also observed based on experiments conducted on a modified pin-on-disc tribometer at ambient and elevated temperatures. From the dispersion analysis it is seen that the nano-lubricant containing unmodified nanoparticles is not suitable for long stationary applications. Analyses of the pin surface before and after sliding with different nano-lubricants at the interface are carried out using Atomic Force Microscopy. The above analyses of the pin surface also show encouraging results with surfactant-modification of CuO nanoparticles in terms of the average surface roughness of the pin surface. The results from the current experimental study envisage the prominence of vegetable oil based nano-lubricants in the foreseeable renewable-based economy.Chacko Preno KoshyPerikinalil Krishnan RajendrakumarManu Varghese ThottackkadJapanese Society of Tribologistsarticlenano-lubricantssurfactantsthin film/boundary lubricationvegetable oilsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 5, Pp 344-353 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	nano-lubricants surfactants thin film/boundary lubrication vegetable oils Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	nano-lubricants surfactants thin film/boundary lubrication vegetable oils Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Chacko Preno Koshy Perikinalil Krishnan Rajendrakumar Manu Varghese Thottackkad Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
description	Superior tribological properties of mineral oil based nano-lubricants in boundary/thin film lubrication are well established. However, in view of the environmental aspects, vegetable oils are more preferable and studies are being carried out to evaluate the performance of vegetable oils when nanoparticles are added to them. In this paper, behaviour of vegetable oils with the addition of Copper Oxide (CuO) nanoparticles is presented to evaluate their thermo-physical and tribological properties. Experimental studies at elevated temperatures are carried out on two base oils, viz., coconut and mustard oils as well as the nano-lubricants formulated from them by the addition of unmodified and surfactant-modified CuO nanoparticles separately. Enhancement of thermo-physical properties such as viscosity and fire-point is more pronounced for nano-lubricants containing surfactant-modified CuO nano-lubricants than the corresponding nano-lubricants containing unmodified CuO nanoparticles. Similar improvements in friction-reduction and anti-wear properties are also observed based on experiments conducted on a modified pin-on-disc tribometer at ambient and elevated temperatures. From the dispersion analysis it is seen that the nano-lubricant containing unmodified nanoparticles is not suitable for long stationary applications. Analyses of the pin surface before and after sliding with different nano-lubricants at the interface are carried out using Atomic Force Microscopy. The above analyses of the pin surface also show encouraging results with surfactant-modification of CuO nanoparticles in terms of the average surface roughness of the pin surface. The results from the current experimental study envisage the prominence of vegetable oil based nano-lubricants in the foreseeable renewable-based economy.
format	article
author	Chacko Preno Koshy Perikinalil Krishnan Rajendrakumar Manu Varghese Thottackkad
author_facet	Chacko Preno Koshy Perikinalil Krishnan Rajendrakumar Manu Varghese Thottackkad
author_sort	Chacko Preno Koshy
title	Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
title_short	Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
title_full	Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
title_fullStr	Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
title_full_unstemmed	Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study
title_sort	analysis of tribological and thermo-physical properties of surfactant-modified vegetable oil-based cuo nano-lubricants at elevated temperatures - an experimental study
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/9e067b27c86f412aa61b68a2d91a32d9
work_keys_str_mv	AT chackoprenokoshy analysisoftribologicalandthermophysicalpropertiesofsurfactantmodifiedvegetableoilbasedcuonanolubricantsatelevatedtemperaturesanexperimentalstudy AT perikinalilkrishnanrajendrakumar analysisoftribologicalandthermophysicalpropertiesofsurfactantmodifiedvegetableoilbasedcuonanolubricantsatelevatedtemperaturesanexperimentalstudy AT manuvarghesethottackkad analysisoftribologicalandthermophysicalpropertiesofsurfactantmodifiedvegetableoilbasedcuonanolubricantsatelevatedtemperaturesanexperimentalstudy
_version_	1718444425742385152

Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study

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