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Optimisation of manufacturing process of UHMWPE/nanoHA/MWCNTs
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.
TEMA-NRD, Mechanical Engineering Department, University of Aveiro.
TEMA-NRD, Mechanical Engineering Department, University of Aveiro.
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2010 (English)Conference paper, Presentation (Other academic)
Abstract [en]

Hip- and knee replacements are amongst the most common performed surgical operations performed today. Ultra high molecular weight polyethylene (UHMWPE) is frequently used for joint-replacements due to its excellent properties such as high impact strength, toughness and low friction. Wear debris produced when UHMWPE is sliding against a metal counter face is one of the major causes of total failure of implant as an effect of wear debris induced osteolysis. The nano scale dimensions of Carbon nanotubes (CNTs) give them unique physical and chemical properties. Their high aspect ratio makes them perfect as reinforcement in composite materials. Hydroxyapatite (HA) is similar in chemical composition and structure to apatite naturally occurring in human bone tissue and is thus positively affecting bone integration. However the brittleness and poor strength of HA limits the use of HA in load-bearing areas. This work focuses on the manufacturing of a new CNT and HA reinforced UHMWPE bio nanocomposite, using solvent casting and a melt-mixing method. Hot press was used to fabricate the final sample. The produced bio-nanocomposite was characterized by use of differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and micro-Raman spectroscopy. Nanoindentation was used to study the hardness and elastic modulus of samples containing CNTs and different HA loading.

Place, publisher, year, edition, pages
2010.
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-39140Local ID: dc572420-aebb-11df-a707-000ea68e967bOAI: oai:DiVA.org:ltu-39140DiVA: diva2:1012649
Conference
International conference on Advanced Nano Materials : 12/09/2010 - 15/09/2010
Note
Godkänd; 2010; Bibliografisk uppgift: (oral presentation); 20100823 (emami)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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