Experimental studies on stability of multi walled carbon nanotube with different oil based nanofluids

The demand for bio-degradable lubricants has been increasing nowadays due to concerns on pollution free environment. Vegetable oil-based lubricant is one of promising sources of lubricant that can fulfill the requirement, especially when combined with eco-friendly nanomaterial additives. On the other hand, tribo-layer formation as the mechanism of friction and wear reduction in a tribo-pair has been generally accepted in tribology field. The tribo-layer layer can be formed due to the tribochemical reaction during friction process and its formation can be enhanced with incorporation of nanomaterials as additive. In this study, the tribo-layer characteristics formed on self-mated AISI52100 contact pair were investigated. The contact pair were lubricated by two kind of lubricant's specimens, i.e. palm methyl ester (PME) and palm methyl ester containing graphene nanosheet additive. It is found that in the case of palm methyl ester without graphene additive, the tribo-layer comprises oxidative layer of Fe and O elements. With the presence of graphene nanosheets in the lubricant, the tribo-layer was formed in a comparatively wider contact area. Carbon element was more observable in the layer besides oxygen, emphasizing the role of graphene nanoparticles. In both cases, the friction coefficient and wear are relatively similar.

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“…3). This method of evaluation is simple yet effective and has been applied elsewhere, for example in [21,22]. Fig.…”

Section: Lubricant Preparationmentioning

confidence: 99%

Tribo-layer Properties on AISI52100 Lubricated by Palm Methyl Ester Containing Graphene Nanosheet

Fuadi¹,

Kurniawan²,

Mulana³

2023

Tribol. Ind.

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“…Figure 5 shows the stability of the lubricant as a function of time, evaluated by capturing the image of the lubricant in a clear container. Such a stability evaluation method has been applied in many works, such as (Oliveira et al, 2017;Awang et al, 2019;Periyasamy et al, 2020;Rahmadiawan et al, 2021a). Images at day 1 indicate the lubricant after 1-h sonification.…”

Section: Stability Of the Lubricantsmentioning

confidence: 99%

Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

et al. 2022

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The demand for bio-degradable lubricants is continuously increasing due to environmental concerns. One of the methods to achieve the bio-degradability property of lubricants is by using nanoparticles from bio-resources as additives in bio-degradable oils. Among the nanomaterials are nanofibers, cellulose, and graphene nanoplatelets. They can be mixed in Polyolester (POE) oil to produce lubricants for tribological applications. In a previous study, it has been confirmed that friction and wear of the tribo-pair reduced from 5 to 10% by mixing various volume percentages of bacterial cellulose (BC) into PEO as the base lubricant. The tribological performance BC containing POE base lubricant can further be enhanced by incorporating graphene nanoplatelets. This study shows that the specific wear rate of the material decreased by 20% by adding graphene nanoplatelets in BC containing POE oil. The friction and wear improvement can be related to the formation of tribofilm on the contact interface. EDS analysis indicates that oxygen played an important role in the friction and wear performance of the POE oil-based lubricant with BC and graphene additives. The tribofilm shows significant traces of oxygen elements. The presence of graphene nanoplatelets in POE oil removed the oxygen-rich layer but could not reduce the wear rate. However, incorporating both graphene and BC in POE oil significantly improved friction and wear, although the oxygen element was still traceable on the contact interface.

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“…Traditional heat transfer fluids, such as water, include minor thermal conductivity, the most important thermophysical attribute, resulting in reduced efficiency of heat transfer [5]. The adding of nanoparticles extremely thermal conductive materials, particularly at the nanoscale, produces nanofluid (NF), which has emerged as an effective HTF over the past two decades and has been studied in an extensive variety of applications [6,7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Heat Transfer by Using Nanofluid and Impact of Thermophysical Properties

Karikalan

Baskar

Poyyamozhi³

et al. 2022

Journal of Nanomaterials

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The scope of the project is to analyse the heat transfer behaviours by using shell and tube heat exchangers and measurements of various thermophysical properties of carbon nanotube nanofluid. The nanofluid is created using different volume fractions at different operation temperatures. The research focuses on theoretical and experimental research on CNT nanofluids, with the goal of improving thermophysical parameters such as thermal conductivity, specific heat, and viscosity. The thermophysical characteristics of CNTs were investigated using this theoretical method. Various tests were carried out to investigate the thermophysical qualities, and they were found to have an impact. The improved characteristics of carbon nanotubes (CNTs) have the potential to save energy and reduce CO2, NO2, and SO2 emissions in industrial settings. Improving heat exchange performance in the thermal sector would result in a high heat-to-power conversion efficiency. Nanofluids can considerably enhance critical heat flux (CHF) in heat transfer systems.

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Experimental studies on stability of multi walled carbon nanotube with different oil based nanofluids

Cited by 7 publications

References 26 publications

Tribo-layer Properties on AISI52100 Lubricated by Palm Methyl Ester Containing Graphene Nanosheet

Tribo-layer Properties on AISI52100 Lubricated by Palm Methyl Ester Containing Graphene Nanosheet

Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

Experimental Analysis of Heat Transfer by Using Nanofluid and Impact of Thermophysical Properties

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