Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Surface modification of bioceramics by grafting of tailored allyl phosphonic acid
AU - Phillips, M.J.
AU - Duncanson, P.
AU - Wilson, K.
AU - Darr, J.A.
AU - Griffiths, D.V.
AU - Rehman, I.
PY - 2005
Y1 - 2005
N2 - 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-1) and phosphate V3 (1030 cm-1) peaks. The continued presence of C=C functionality on the surface of the grafted CAP was indicated by FTIR and FTR spectra (peaks at 1650 and 1635 cm-1 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. © 2005 Institute of Materials, Minerals and Mining.
AB - 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-1) and phosphate V3 (1030 cm-1) peaks. The continued presence of C=C functionality on the surface of the grafted CAP was indicated by FTIR and FTR spectra (peaks at 1650 and 1635 cm-1 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. © 2005 Institute of Materials, Minerals and Mining.
KW - Calcium phosphate
KW - Composite
KW - Coupling agent
KW - FTIR
KW - Surface grafting
KW - Surface modification
KW - Agents
KW - Bone cement
KW - Calcium compounds
KW - Fourier transform infrared spectroscopy
KW - Grafting (chemical)
KW - Halide minerals
KW - Hydroxyapatite
KW - Nuclear magnetic resonance
KW - Organic acids
KW - Phosphates
KW - Raman spectroscopy
KW - Surface treatment
KW - Allyl phosphonic acid
KW - Bioceramics
KW - Calcium phosphate (CAP)
KW - Ceramic matrix composites
U2 - 10.1179/174367605X62436
DO - 10.1179/174367605X62436
M3 - Journal article
VL - 104
SP - 261
EP - 267
JO - Advances in Applied Ceramics
JF - Advances in Applied Ceramics
SN - 1743-6753
IS - 5
ER -