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Novel bio nano-composite for biomedical application
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
University of Aveiro.
University of Aveiro.
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2010 (English)In: 14th Nordic Symposium on Tribology: NORDTRIB 2010 : Storforsen, Sweden, June 8-11, 2010, Luleå: Luleå tekniska universitet, 2010Conference paper (Refereed)
Abstract [en]

Carbon nanoforms exhibit exceptional physical and chemical properties due to their nano-scale dimensions. They also have very high aspect ratio which makes them an excellent reinforcement material for polymer composites. Hydroxyapatite (HA) is the prime constituent of bone generation because of its ability to bond chemically with living bone tissues and positively affect the osteoblasts; this is due to its similar chemical composition and crystal structure to apatite in the human skeletal system. Ultra high molecular weight polyethylene (UHMWPE) is already used as implant material in high stress bearing areas such as hip and knee prosthesis. Wear debris of ultra high molecular weight polyethylene cause osteolysis which is a major reason of long-term failure of total hip replacements.In this study carbon nanoforms together with hydroxyapatite (HA) nanoparticles were used as reinforcement in UHMWPE matrix in order to produce high strength and wear resistant biocomposites with better bioactivity character. Solvent casting and melt blending methods was used during the preparation of this bio-nano composite. The phase compositions and the surface morphology of the nanocomposite material have been studied using X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), and micro-Raman spectroscopy. Nanoindentation technique was used to determine the elastic modulus and hardness of the nanocomposites with different weight% of HA and carbonnanoforms concentrations. The tribologic behaviour of this nano composite was studied using pin-on-plate method. Wear and friction of the produced nano-composites were studied in different biological lubrications.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2010.
Research subject
Machine Elements
URN: urn:nbn:se:ltu:diva-40458Local ID: f9aa4580-aeba-11df-a707-000ea68e967bISBN: 978-91-7439-124-4 (PDF)OAI: diva2:1013980
Nordic Symposium on Tribology : 08/06/2010 - 11/06/2010
Godkänd; 2010; 20100823 (emami)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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