Bioactive coatings obtained at room temperature with hydroxyapatite and polysiloxanes |
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Affiliation: | 1. National Metal and Materials Technology Center (MTEC), Pathumthani 12120, Thailand;2. Department of Physics, Faculty of Science, King Mongkut’s University of Technology Thonburi, Bangkok, 10140, Thailand;3. School of Physics–Institute of Science, Suranaree University of Technology Muang, Nakhon Ratchasima, 30000, Thailand;4. Optical Thin-Film Laboratory, National Electronics and Computer Technology Center, Pathumthani 12120, Thailand |
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Abstract: | Low temperature Hydroxylapatite (HA) coatings were obtained on metal substrates by depositing HA particles suspended in a ormosil polymer gel made of an equimolar mixture of amino and epoxy substituted silanes. The new coatings were analysed by thermal analysis, infrared and solid state NMR, as well as X-ray diffraction and SEM observations. Results show the HA powder conserves its characteristic physicochemical properties during the coating process. Furthermore, the coatings induce the formation of a biomimetic HA layer when soaked in simulated body fluids. This room temperature process may lead to novel calcium phosphate coatings with better control of crystallinity and porosity and with the possible incorporation of biofunctional organic molecules. |
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