ANM
2010
3rd
International Conference on Advanced Nano Materials
12-15 September 2010 - Agadir, Morocco
|
|
Abstract
|
ANMM218 |
|
|
BIOTRIBOLOGICAL BEHAVIOUR OF REINFORCED UHMWPE |
|
|
Nazanin Emami 1, Evelina Enqvist 1, José Grácio 2 , Gil Gonçalves 2 and Paula Marques 2 |
|
|
1 Department of Applied Physics and Mechanical Eng, Luleå University of Technology, Sweden
2 Nanotechnology Research Division, University of Aveiro, Portugal |
|
|
. |
|
|
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 biocomposite with better
bioactivity character. Solvent casting and melt blending methods were
used during the preparation of this bio-nano composite. The
manufacturing process was studied using different characterization
methods such as diferencial scanning calorimetry (DSC), scanning
electron microscopy (SEM) and Raman-spectroscopy. The tribological
behaviour of the manufactured bio-nano composite was studied using
pin-on-plate method. Wear and friction of the produced novel composite
were studied in different biological lubrications. Different
lubrication affected the friction rate and wear, though the results
were not statistically different. The reinforced UHMWPE showed superior
tribology behaviour in comparison to pure UHMWPE (p>0.05).
|
|
.
|