|
Ceramics-Silikáty 52, (4) 260 - 267 (2008) |
|
EFFECT OF NANO/MICRO PARTICLES OF CALCIUM PHOSPHATES ON THE MECHANICAL PROPERTIES OF COMPOSITES BASED ON POLYSILOXANE MATRIX REINFORCED BY POLYAMIDE
|
Balík Karel 1, Suchý Tomáš 1,2, Sucharda Zbyněk 1,
Černý Martin 1,
Bačáková Lucie 3,
Sochor Miroslav 2,
Šlouf Miroslav 4
|
1 Institute of Rock Structure and Mechanics, AS CR, v.v.i., Dept. of Composite and Carbon Materials,
V Holešovičkách 41, 182 09 Prague, Czech Republic
2 Laboratory of Biomechanics, Czech Technical University, Faculty of Mechanical Engineering,
Department of Mechanics, Biomechanics and Mechanotronics, Technická 4, 166 07 Prague, Czech Republic
3 Institute of Physiology, AS CR, v.v.i., Vídeňská 1083, 142 20 Prague, Czech Republic
4 Institute of Macromolecular Chemistry, AS CR, v.v.i., Heyrovského náměstí 2, 162 06 Prague, Czech Republic
|
Keywords: Aramid fibers, Polymer-matrix composites (PMCs), Mechanical properties, Matrix modifications,
Hydroxyapatite, Tricalcium phosphate
|
Composite materials based on a polyamide fabric and a polysiloxane matrix were designed for application in bone surgery.
In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % (powder/matrix) of nano/micro hydroxyapatite (HA) and
tricalcium phosphate (TCP) were added. The effect of the additives on the mechanical properties was studied. Simultaneously,
changes in the inner structure of the composites were investigated by means of image analysis. It appears that in comparison
with the micro particles, the nano additives have a more favourable effect on mechanical properties. From the point of
view of the final application of the composites as substitutes for hard tissues, 10-15 vol. % of nano additives is an optimum
amount: in this case both the optimization of the toughness and the increase in the ultimate strength in bending occur
without any changes in the inner structure of the composite. |
 PDF (2.6 MB) |
|
|
