Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 26, Issue 1-3, Pages 1219-1222Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1020772521781
Keywords
ormosil; porous hybrid; bioactivity; apatite deposition; simulated body fluid
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Polydimethylsiloxane (PDMS) and tetraethoxysilane (TEOS)-based porous organically modified silicates (ORMOSILs) for biomedical applications were synthesized through a sol-gel process, using sucrose particles as templates. These materials were characterized by Si-29 CP-MAS NMR spectroscopy, thin film X-ray diffraction, and scanning electron microscopy. Their bioactivity was evaluated using a simulated body fluid (SBF) of Kokubo recipe. These materials had a bimodal porous structure with pores of 300-500 mum and 10-50 mum in diameter. NMR showed that the silanol groups of the PDMS chain cross-linked to silica derived from the hydrolysis and condensation of TEOS. The samples containing Ca(II) exhibited apatite deposition on the pore walls within 3 days in SBF.
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