A Novel Bio-nanocomposite for Medical Applications
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
UltraHigh Molecular Weight Polyethylene (UHMWPE) is the most commonly used counter face in implants based on Charnley’s principle, where a metal femoral head is articulating on a polymer acetabular cup (MoP). It has been used since the 1960’s due to it’s excellent properties such as high impact strength, toughness and low friction. Still, one of the major problems with these replacements is loosening of the implant caused by wear debris produced when the polymer is sliding against a hard metal counter face. New materials with higher wear resistance are needed to avoid revision surgery for particularly younger and more active patients. Hydroxyapatite is a mineral naturally occurring in human bone tissue and is the main constituent for bone generation. The high aspect ratio and unique physical and chemical properties of Carbon Nanotubes (CNT) makes them promising as reinforcement in polymer based composites. This project focuses on the manufacturing of a new CNT and HA reinforced UHMWPE bio-nanocomposite using solvent casting and a melt-mixing method. Finally hot-press is performed to produce the final shape of the samples. Different wt % of HA was studied while CNT content were fixed to 0.1 wt%. The surface of the bio-nanocomposite was studied using Scanning electron microscopy (SEM), Thermal properties was studied using Differential Scanning Calorimetry (DSC). Nanoindentation was used to study the hardness and elastic modulus of the samples and wear behavior was studied using a pin-on-plate configuration.
Place, publisher, year, edition, pages
2011. , 72 p.
IdentifiersURN: urn:nbn:se:ltu:diva-48447Local ID: 5e6f5693-59bb-4a12-b9fb-7526f892c03bOAI: oai:DiVA.org:ltu-48447DiVA: diva2:1021789
Subject / course
Student thesis, at least 30 credits
Materials Engineering, master's level
Validerat; 20110112 (anonymous)2016-10-042016-10-04Bibliographically approved