Apatite formation on CaO-free polydimethylsiloxane (PDMS)-TiO2 hybrids

M. Kamitakahara, M. Kawashita, N. Miyata, T. Kokubo, T. Nakamura

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Polydimethylsiloxane (PDMS)-TiO2 hybrids with PDMS (M=550)/tetraethylorthotitanate molar ratios at 0.27, 0.68 and 1.35, i.e. Si/Ti atomic ratios at 2, 5 and 10 (hybrids PD2, PD5 and PD10, respectively) were prepared by a sol-gel method. Hybrid PD2 formed many cracks. Hybrids PD5 and PD10 were subjected to hot-water treatment 80°C for 7 d. Hybrid PD5 produced cracks, whereas hybrid PD10 was crack-free after the hot-water treatment. Hybrid PD10 took a homogeneous amorphous structure before the hot-water treatment, and precipitated anatase particles 10-20 nm in size after the hot-water treatment. Hybrid PD10 did not form apatite on its surface in a simulated body fluid before the hot-water treatment, but formed it after the hot-water treatment. The obtained hybrid showed elastic deformation as large as 200% after the hot-water treatment. This kind of hybrid could be useful as a new type of bone-repairing material.

Original languageEnglish
Pages (from-to)1067-1072
Number of pages6
JournalJournal of Materials Science: Materials in Medicine
Volume14
Issue number12
DOIs
Publication statusPublished - 2003 Dec

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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