The purpose of the research consists in obtaining and testing gradient ceramics/polymer biocomposite. It could be used for design and future production of small joints endoprosthesis parts. The material should fulfill at least three functions which determine the usefulness of prosthesis: load bearing function, fastening and stabilizing endoprosthesis to the bone and tribologic function allowing mating with another parts of the joint or prosthesis.

Samples of alumina foams were formed by polymeric sponge method using structural sponges of different pore per inch density. During the mapping process of alumina foams a 3D structure of interconnected posts was built. Structures of different size of spaces between posts and differing total porosity can be obtained by the selection of polyurethane sponges types.

Degradable polyurethanes based on poly(e-caprolactone)diol and 4,4`-diisocyanate dicycloheksymethane were made. As chain extenders two different agents were used: ethylene glycol (EG) and water. Advantage of the polymer made from water as a chain extender is its long pot-life and low viscosity before curing as well as very good physical and mechanical properties in comparison to polymer made from EG as a chain extender. The alumina/polymer composite is characterized by much higher compressive strength than alumina foam itself. The compressive strength of the composite depends on the polymer composition used for the infiltration of alumina foams.

Polyurethanes characterized by good wear resistance, based on 4,4`-diisocyanate dicycloheksymethane and polytetramethylene ether glycol (PTMEG) were also prepared.

Results show that it is possible to obtain functional alumina/polyurethane composite, which could fulfill requirements for the material used for manufacturing of joint endoprosthesis parts.

This work is financed by Polish Ministry of Science and Higher Education (grant nr 3 T08D 03129)

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/16082 must be provided.

1. Thermoplastic nanocomposites with enhanced electrical conductivity
2. New photonic composite materials for aircraft applications
3. Modification of epoxy resin properties by adding multi wall carbon nanotubes
4. Modyfikacje polimerów stosowanych w lotnictwie za pomocą nanorurek węglowych
5. Calcite-based material for tissue engineering ceramic scaffolds
6. FEM simulations of a magnetorheological elastomer with consideration of magneto mechanical coupling
7. Experimental validation of numerical methods of MRE simulations
8. Urethane magnetorheological elastomers – manufacturing, microstructure and properties
9. Image analysis of magnetorheological elastomers microstructure
10. Synthesis, microstructure and properties of urea-urethane hybrid nanocomposites
11. Improvement of wetting and bonding of SiO₂ ceramics and urea-urethane elastomer
12. Effects of glass and polymer on the setting and mechanical properties of water - activated glass ionomer cements
13. Polymer matrix composites with nanoparticles of TiC obtained by a sol-gel method
14. FINITE ELEMENT MODELLING OF THE RESIDUAL STRESSES IN THE CERAMIC-ELASTOMER COMPOSITES
15. Microstructure of alumina bone graft material
16. Glass-ionomeric materials for otologic surgery
17. Comparison of properties of porous alumina as a potential cell carrier formed by foaming and polymeric sponge methods
18. Morphology and Properties of Urea-Urethane Nanocomposites Obtained from Crystalline Prepolymers with Different Chemical Structure