Apatite-forming ability and mechanical behavior of PTMO-modified CaO-TiO2 hybrids prepared by sol-gel processing

Noboru Miyata, Ken Ichi Fuke, Qi Chen, Masakazu Kawashita, Tadashi Kokubo, Takashi Nakamura

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Triethoxysilane end-capped poly (tetramethylene oxide) (Si-PTMO)-modified CaO-TiO2 hybrids were prepared by hydrolysis and polycondensation of Si-PTMO, tetraisopropyltitanate (TiPT) and calcium nitrate. Under constant ratio of(Si-PTMO) / (TiPT) = 2/3 in weight, the molar ratio of(Ca(NO3)2)/(TiPT) was varied from 0 to 0.15. The apatite-forming ability was evaluated in a simulated body fluid (SBF) and the mechanical properties including Young's modulus, strength and strain at failure were measured in air by three-point bending test. The apatite-forming ability in SBF remarkably increased with increasing CaO content, although the bending strength and Young's modulus decreased. The hybrid samples with (Ca(NO3)2)/(TiPT) = 0.10 and 0.15 in mol, respectively, formed the apatite on their surface within only one day. The failure strains were found to be in the range of about 13 to 25%. Thus, the hybrids exhibiting both high apatite-forming ability and high capability for deformation were successfully synthesized. These hybrids may be useful as new kind of bioactive bone-repairing materials.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalKey Engineering Materials
Publication statusPublished - 2002 Jan 1
Event14th International Symposium on Ceramics in Medicine-Annual Meeting of the International Society for Ceramics in Medicine BIOCERAMICS'01 (ISCM) - Palm Springs, CA, United States
Duration: 2001 Nov 142001 Nov 17


  • Apatite
  • Bioactivity
  • Inorganic-Organic Hybrid
  • Mechanical Properties
  • Sol-Gel Process

ASJC Scopus subject areas

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


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