Surface modification of bioceramics by grafting of tailored allyl phosphonic acid
| Autor: | Ihtesham Ur Rehman, M. J. Phillips, Jawwad A. Darr, P. Duncanson, K. Wilson, D. V. Griffiths |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Coprecipitation Mineralogy Bioceramic Phosphate Grafting Industrial and Manufacturing Engineering Apatite chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy visual_art Ceramics and Composites visual_art.visual_art_medium Surface modification Fourier transform infrared spectroscopy Nuclear chemistry |
| Zdroj: | Advances in Applied Ceramics. 104:261-267 |
| ISSN: | 1743-6761 1743-6753 |
| Popis: | A new route to interfacial bonding between ceramic and matrix in biocomposites is identified. A tailored allyl phosphonic acid is used as a coupling agent bound to the surface of a bioceramic to form a ‘grafted’ calcium phosphate (CAP). The allyl phosphonic acid coupling agent is synthesised by reaction of allyl halide and trialkyl phosphite. Successful synthesis was confirmed by nuclear magnetic resonance and Fourier transform infrared spectroscopy (FTIR). The allyl phosphonic acid was incorporated onto calcium phosphate using a wet chemical coprecipitation synthesis route. The resulting ‘grafted’ CAP was characterised using FTIR coupled with photoacoustic sampling, and Fourier transform Raman spectroscopy (FTR). The spectroscopic data suggest an interaction between the allyl phosphonic acid and calcium phosphate resulting from observed reductions in intensity of the hydroxyl (3570 cm 21 ) and phosphate n3 (1030 cm 21 ) peaks. The continued presence of C5C functionality on the surface of the grafted CAP was indicated by FTIR and FTR spectra (peaks at 1650 and 1635 cm 21 respectively) and confirmed by X-ray photoelectron spectroscopy (XPS). On the basis of these results, it is concluded that grafted CAP may be used to produce a chemically bonded composite with superior mechanical properties. |
| Databáze: | OpenAIRE |
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