Abstract
Calcium-free poly(tetramethylene oxide) (PTMO)-Ta2O5 hybrids were prepared by a sol-gel method from triethoxysilane-functionalized PTMO (Si-PTMO) and tantalum ethoxide (Ta(OEt)5) with Si-PTMO/Ta(OEt)5 mass ratio of 30/70, 40/60 and 50/50 (hybrids PT30Ca0, PT40Ca0 and PT50Ca0, respectively). A calcium-containing PTMO-Ta 2O5 hybrid was prepared from Si-PTMO, Ta(OEt)5 and CaCl2 with Si-PTMO/Ta(OEt)5 weight ratio of 40/60 and CaCl2/Ta(OEt)5 mole ratio of 0.15 (hybrid PT40Ca15). Crack-free transparent monolithic hybrids were obtained for all the compositions except for PT30Ca0. Hybrids PT40Ca0 and PT50Ca0 formed apatite on their surfaces in a simulated body fluid (SBF) within 14 d. Hybrid PT40Ca0 showed higher mechanical strength and larger strain to failure than human cancellous bone. Its mechanical strength was a little increased by soaking in SBF. Hybrid PT40Ca15 formed apatite on its surface in SBF within 3 d. This hybrid, however, showed a significant decrease in mechanical strength after soaking in SBF. Bioactive flexible materials of calcium-free PTMO-Ta 2O5 hybrids are expected to be useful for bone repair.
Original language | English |
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Pages (from-to) | 521-524 |
Number of pages | 4 |
Journal | Key Engineering Materials |
Volume | 254-256 |
Publication status | Published - 2004 Jan 1 |
Event | The Annual Meeting of the International Society for Ceramics in Medicine - Porto, Portugal Duration: 2003 Nov 6 → 2003 Nov 9 |
Keywords
- Apatite
- Hybrid
- Mechanical properties
- PTMO-TaO
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering