Abstract
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 language | English |
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Pages (from-to) | 117-122 |
Number of pages | 6 |
Journal | Key Engineering Materials |
Volume | 218-220 |
Publication status | Published - 2002 Jan 1 |
Event | 14th 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 14 → 2001 Nov 17 |
Keywords
- Apatite
- Bioactivity
- Inorganic-Organic Hybrid
- Mechanical Properties
- Sol-Gel Process
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering