Abstract
In the present study, we report the bioactivity of PDMS-CaO-SiO2-P2O5 hybrid materials prepared by a sol-gel method. The apatite formation on the surface of the specimen, after soaking in the simulated body fluid (SBF), was analyzed by thin-film X-ray diffraction (TF-XRD) and Fourier transform infrared (FT-IR) reflection spectroscopy. The structure and morphology of the surface layer were observed by FT-Raman spectroscopy, BET, and scanning electron microscopy (SEM). It was found that the bioactivity increased with decreasing PDMS content and increasing CaO content. Also, an increase in P2O5 concentration from 0 to 3 mol % decreased the induction period for apatite formation. A further increase in P2O5 content, however, increased the induction period. It was also noted that an increase in the P2O5 concentration from 0 to 3 mol % increased the surface area and micropore area and volume and decreased the pore diameter. On the other hand, the opposite trends were observed with a further increase in the P2O5 concentration. Among the various ormosil samples prepared with different compositions, the highest bioactivity was obtained from the ormosil with the composition of 20 wt % PDMS [PDMS/(TEOS + PDMS)], 15 mol % CaO [(Ca(NO3)2/TEOS) mole ratio], 3 mol % P2O5 [TEP/TEOS mole ratio].
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Hench, L.L., Splinter, R.J., and Allen, W.C., Bonding Mechanism at the Interface of Ceramic Prosthetic Materials, J. Biomed. Mater. Res., 1973, vol. 2, pp. 117–141.
Li, P., Ohtsuki, C., Kokubo, T., Nakanish, K., Soga, N., Nakamura, T., and Yamamuro, T., Apatite Formation Induced by Silica Gel in a Simulated Body Fluid, J. Am. Ceram. Soc., 1992, vol. 75, pp. 2094–2097.
Tsuru, K., Ohtsuki, C., Osaka, A., Iwamoto, T., and Mackenzie, J.D., Synthesis of Bioactive ORMOSILS by the Sol-Gel Method, Mat. Res. Soc. Symp. Proc., 1996, vol. 435, pp. 403–408.
Chen, Q., Miyaji, F., Kokubo, T., and Nakamura, T., Apatite Formation on PDMS-Modified CaO-SiO2-TiO2 Hybrids Prepared by Sol-Gel Process, Biomaterials, 1999, vol. 20, no.12, pp. 1127–1132.
Chen, Q., Miyata, N., Kokubo, T., and Nakamura, T., Bioactivity and Mechanical Properties of PDMS-Modified CaO-SiO2-TiO2 Hybrids Prepared by Sol-Gel Process, J. Biomed. Mater. Res., 2000, vol. 51, no.4, pp. 605–611.
Chen, Q., Kamitakahara, M., Miyata, N., Kokubo, T., and Nakamura, T., Preparation of Bioactive PDMS-Modified CaO-SiO2-TiO2 Hybrids by the Sol-Gel Method, J. Sol-Gel Sci. Technol., 2000, vol. 19, nos.1–3, pp. 101–105.
Seo, D.W., Kim, J.G., Kim, Y.H., and Whang, C.M., Apatite Formation on PDMS-Modified SiO2-CaO-P2O5 Hybrids Prepared with Different P2O5 Content by Sol-Gel Method, Mater. Sci. Forum, 2004, vols. 449–452, pp. 1121–1124.
Salonas, A.J., Vallet-Regi, M., and Izquierdo-Barba, I., Biomimetic Apatite Deposition on Calcium Silicate Gel Glasses, J. Sol-Gel Sci. Technol., 2001, vol. 21, nos.1–2, pp. 13–25.
Ohtsuki, C., Kokubo, T., and Yamamuro, T., Mechanism of Apatite Formation on CaO-SiO2-P2O5 Glasses in a Simulated Body Fluid, J. Non-Cryst. Solids, 1992, vol. 143, pp. 84–92.
Author information
Authors and Affiliations
Additional information
Original English Text Copyright © 2005 by Fizika i Khimiya Stekla, Whang, Seo, Oh, Kim.
This article was submitted by the authors in English.
Rights and permissions
About this article
Cite this article
Whang, C.M., Seo, D.W., Oh, E.O. et al. Compositional Dependence of Apatite Formation in Sol-Gel Derived Organic-Inorganic Hybrids. Glass Phys Chem 31, 396–401 (2005). https://doi.org/10.1007/s10720-005-0075-z
Issue Date:
DOI: https://doi.org/10.1007/s10720-005-0075-z