Apatite-Forming Ability and Mechanical Properties of Poly(tetramethylene oxide) (PTMO)-Ta2O5 Hybrids

M. Kamitakahara, M. Kawashita, N. Miyata, H. M. Kim, T. Kokubo, C. Ohtsuki, T. Nakamura

Research output: Contribution to journalConference articlepeer-review


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 languageEnglish
Pages (from-to)521-524
Number of pages4
JournalKey Engineering Materials
Publication statusPublished - 2004 Jan 1
EventThe Annual Meeting of the International Society for Ceramics in Medicine - Porto, Portugal
Duration: 2003 Nov 62003 Nov 9


  • Apatite
  • Hybrid
  • Mechanical properties
  • PTMO-TaO

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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