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Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites
Ultra-high molecular weight polyethylene (UHMWPE) is widely used in artificial joints in the replacement of knee, hip and shoulder that has been impaired as a result of arthritis or other degenerative joint diseases. The UHMWPE made plastic cup is placed in the joint socket in contact with a metal o...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432064/ https://www.ncbi.nlm.nih.gov/pubmed/30974574 http://dx.doi.org/10.3390/polym8080295 |
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author | Naresh Kumar, Nitturi Yap, Seong Ling bt Samsudin, Farah Nadia Dayana Khan, Muhammad Zubair Pattela Srinivasa, Rama Sreekanth |
author_facet | Naresh Kumar, Nitturi Yap, Seong Ling bt Samsudin, Farah Nadia Dayana Khan, Muhammad Zubair Pattela Srinivasa, Rama Sreekanth |
author_sort | Naresh Kumar, Nitturi |
collection | PubMed |
description | Ultra-high molecular weight polyethylene (UHMWPE) is widely used in artificial joints in the replacement of knee, hip and shoulder that has been impaired as a result of arthritis or other degenerative joint diseases. The UHMWPE made plastic cup is placed in the joint socket in contact with a metal or ceramic ball affixed to a metal stem. Effective reinforcement of multi-walled carbon nanotubes (MWCNTs) in UHMWPE results in improved mechanical and tribological properties. The hydrophobic nature of the nanocomposites surface results in lesser contact with biological fluids during the physiological interaction. In this project, we investigate the UHMWPE/MWCNTs nanocomposites reinforced with MWCNTs at different concentrations. The samples were treated with cold argon plasma at different exposure times. The water contact angles for 60 min plasma-treated nanocomposites with 0.0, 0.5, 1.0, 1.5, and 2.0 wt % MWCNTs were found to be 55.65°, 52.51°, 48.01°, 43.72°, and 37.18° respectively. Increasing the treatment time of nanocomposites has shown transformation from a hydrophobic to a hydrophilic nature due to carboxyl groups being bonded on the surface for treated nanocomposites. Wear analysis was performed under dry, and also under biological lubrication, conditions of all treated samples. The wear factor of untreated pure UHMWPE sample was reduced by 68% and 80%, under dry and lubricated conditions, respectively, as compared to 2 wt % 60 min-treated sample. The kinetic friction co-efficient was also noted under both conditions. The hardness of nanocomposites increased with both MWCNTs loading and plasma treatment time. Similarly, the surface roughness of the nanocomposites was reduced. |
format | Online Article Text |
id | pubmed-6432064 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64320642019-04-02 Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites Naresh Kumar, Nitturi Yap, Seong Ling bt Samsudin, Farah Nadia Dayana Khan, Muhammad Zubair Pattela Srinivasa, Rama Sreekanth Polymers (Basel) Article Ultra-high molecular weight polyethylene (UHMWPE) is widely used in artificial joints in the replacement of knee, hip and shoulder that has been impaired as a result of arthritis or other degenerative joint diseases. The UHMWPE made plastic cup is placed in the joint socket in contact with a metal or ceramic ball affixed to a metal stem. Effective reinforcement of multi-walled carbon nanotubes (MWCNTs) in UHMWPE results in improved mechanical and tribological properties. The hydrophobic nature of the nanocomposites surface results in lesser contact with biological fluids during the physiological interaction. In this project, we investigate the UHMWPE/MWCNTs nanocomposites reinforced with MWCNTs at different concentrations. The samples were treated with cold argon plasma at different exposure times. The water contact angles for 60 min plasma-treated nanocomposites with 0.0, 0.5, 1.0, 1.5, and 2.0 wt % MWCNTs were found to be 55.65°, 52.51°, 48.01°, 43.72°, and 37.18° respectively. Increasing the treatment time of nanocomposites has shown transformation from a hydrophobic to a hydrophilic nature due to carboxyl groups being bonded on the surface for treated nanocomposites. Wear analysis was performed under dry, and also under biological lubrication, conditions of all treated samples. The wear factor of untreated pure UHMWPE sample was reduced by 68% and 80%, under dry and lubricated conditions, respectively, as compared to 2 wt % 60 min-treated sample. The kinetic friction co-efficient was also noted under both conditions. The hardness of nanocomposites increased with both MWCNTs loading and plasma treatment time. Similarly, the surface roughness of the nanocomposites was reduced. MDPI 2016-08-11 /pmc/articles/PMC6432064/ /pubmed/30974574 http://dx.doi.org/10.3390/polym8080295 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Naresh Kumar, Nitturi Yap, Seong Ling bt Samsudin, Farah Nadia Dayana Khan, Muhammad Zubair Pattela Srinivasa, Rama Sreekanth Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title | Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title_full | Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title_fullStr | Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title_full_unstemmed | Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title_short | Effect of Argon Plasma Treatment on Tribological Properties of UHMWPE/MWCNT Nanocomposites |
title_sort | effect of argon plasma treatment on tribological properties of uhmwpe/mwcnt nanocomposites |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432064/ https://www.ncbi.nlm.nih.gov/pubmed/30974574 http://dx.doi.org/10.3390/polym8080295 |
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