Apatite-forming ability and mechanical properties of CaO-free poly(tetramethylene oxide) (PTMO)-TiO2 hybrids treated with hot water

Masanobu Kamitakahara, Masakazu Kawashita, Noboru Miyata, Tadashi Kokubo, Takashi Nakamura

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Poly(tetramethylene oxide) (PTMO)-TiO2 hybrids were prepared by a sol-gel method from triethoxysilane-functionalized PTMO (Si-PTMO) and tetraisopropyltitanate with weight ratios of 30/70, 40/60 and 50/50 (hybrids PT30, PT40 and PT50, respectively), and subsequently subjected to a hot-water treatment at 95°C for 2d. All the obtained hybrids were amorphous before the hot-water treatment, and precipitated nanosized anatase after the hot-water treatment. The amount of precipitated anatase increased with decreasing PTMO content. Apatite was not formed on the surfaces of the hybrids in a simulated body fluid before the hot-water treatment, but was formed after the hot-water treatment, and its amount increased with decreasing PTMO content. Hybrid PT40 showed strength and Young's modulus analogous to those of human cancellous bones, and high ductility after the hot-water treatment. This kind of hybrid is expected to be useful as a new type of bone-repairing material.

Original languageEnglish
Pages (from-to)1357-1363
Number of pages7
JournalBiomaterials
Volume24
Issue number8
DOIs
Publication statusPublished - 2003 Apr 1

Keywords

  • Anatase
  • Bioactivity
  • Hot-water treatment
  • Mechanical property
  • PTMO-TiO hybrid

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

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