Polydimethylsiloxane (PDMS)-CaO-SiO2 hybrids with starting compositions containing PDMS/(Si(OC2H5)4 + PDMS) weight ratio = 0.30, H2O/Si(OC2H5)4 molar ratio = 2, and Ca(NO3)2/Si(OC2H5)4 molar ratios = 0-0.2, were prepared by the sol-gel method. The apatite-forming ability of the hybrids increased with increasing calcium content in the Ca(NO3)2/Si(OC2H5)4 molar ratio range 0-0.1. The hybrids with a Ca(NO3)2/Si(OC2H5)4 molar ratio range 0.1-0.2 formed apatite on their surfaces in a simulated body fluid (SBF) within 12 h. The hybrid with a Ca(NO3)2/Si(OC2H5)4 molar ratio of 0.10 showed an excellent apatite-forming ability in SBF with a low release of silicon into SBF. It also showed mechanical properties analogous to those of human cancellous bones. This hybrid is expected to be useful as a new type of bioactive material.
|ジャーナル||Journal of Materials Science: Materials in Medicine|
|出版ステータス||Published - 2002 11月 1|
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