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Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan

Protecting metal surfaces from wear damage is of great concern in internal combustion engine systems. Using suitable additives in lubricant oil is one way of addressing this problem. Molybdenum sulphide additives are widely known for their antiwear and antifriction capabilities, and is fast becoming...

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Main Author: Sharul Hafiq , Roslan
Format: Thesis
Published: 2017
Subjects:
QD Chemistry
Online Access:http://studentsrepo.um.edu.my/7983/2/All.pdf
http://studentsrepo.um.edu.my/7983/9/sharul.pdf
http://studentsrepo.um.edu.my/7983/
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spelling my.um.stud.79832020-09-02T19:30:22Z Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan Sharul Hafiq , Roslan QD Chemistry Protecting metal surfaces from wear damage is of great concern in internal combustion engine systems. Using suitable additives in lubricant oil is one way of addressing this problem. Molybdenum sulphide additives are widely known for their antiwear and antifriction capabilities, and is fast becoming one of the main ingredients in lubricants. The preparation steps were modified accordingly to obtain nanosized molybdenum sulphide particles, which allows it to be directly blended into the lubricant to form relatively stable particle dispersion. In order to achieve better dispersion and tribological features, the surface of the inorganic material can be protected using various capping agents. In this research, the surface-capped molybdenum sulphide nanoparticles were synthesised, while various alkyl lengths of fatty acids were used as a capping agent. Hexacarbonylmolybdenum was used as a precursor to synthesise molybdenum (II) acetate, which is an organometallic compound intermediate. This compound was then modified with the capping agent to form capped-surface molybdenum sulphide. The properties of surface-capped molybdenum sulphides were determined using Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, X-ray Diffractometry (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), and Thermal Gravimetric Analyser (TGA). It was then blended into a bio-base oil at concentrations between 0.025-0.125 (w/w) %. The prepared bio-lubricants were then tested using the four-ball tribometer setup, viscometer, and densitometer to determine the friction coefficient (CoF), viscosity, and density, respectively. Scanning Electron Microscopy (SEM) were used to image the wear scars. It is expected that the surface-capped molybdenum sulphide will result in the better antiwear properties and enhanced friction modifying capability. 2017-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/7983/2/All.pdf application/pdf http://studentsrepo.um.edu.my/7983/9/sharul.pdf Sharul Hafiq , Roslan (2017) Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/7983/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Sharul Hafiq , Roslan
Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
description Protecting metal surfaces from wear damage is of great concern in internal combustion engine systems. Using suitable additives in lubricant oil is one way of addressing this problem. Molybdenum sulphide additives are widely known for their antiwear and antifriction capabilities, and is fast becoming one of the main ingredients in lubricants. The preparation steps were modified accordingly to obtain nanosized molybdenum sulphide particles, which allows it to be directly blended into the lubricant to form relatively stable particle dispersion. In order to achieve better dispersion and tribological features, the surface of the inorganic material can be protected using various capping agents. In this research, the surface-capped molybdenum sulphide nanoparticles were synthesised, while various alkyl lengths of fatty acids were used as a capping agent. Hexacarbonylmolybdenum was used as a precursor to synthesise molybdenum (II) acetate, which is an organometallic compound intermediate. This compound was then modified with the capping agent to form capped-surface molybdenum sulphide. The properties of surface-capped molybdenum sulphides were determined using Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, X-ray Diffractometry (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), and Thermal Gravimetric Analyser (TGA). It was then blended into a bio-base oil at concentrations between 0.025-0.125 (w/w) %. The prepared bio-lubricants were then tested using the four-ball tribometer setup, viscometer, and densitometer to determine the friction coefficient (CoF), viscosity, and density, respectively. Scanning Electron Microscopy (SEM) were used to image the wear scars. It is expected that the surface-capped molybdenum sulphide will result in the better antiwear properties and enhanced friction modifying capability.
format Thesis
author Sharul Hafiq , Roslan
author_facet Sharul Hafiq , Roslan
author_sort Sharul Hafiq , Roslan
title Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
title_short Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
title_full Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
title_fullStr Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
title_full_unstemmed Synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / Sharul Hafiq Roslan
title_sort synthesis of surface capped molybdenum sulphide nanoparticles as an antiwear additives for bio-based lubricant oil / sharul hafiq roslan
publishDate 2017
url http://studentsrepo.um.edu.my/7983/2/All.pdf
http://studentsrepo.um.edu.my/7983/9/sharul.pdf
http://studentsrepo.um.edu.my/7983/
_version_ 1738506088009957376
score 13.239859

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