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In vitro structural changes on the surface of SiO2 – CaO – P2O5 bioactive glasses

D. N. UNGUREANU1,* , N. ANGELESCU1, A. CATANGIU1, V. BRATU1, V. DESPA1, F. V. ANGHELINA1, V. TSAKIRIS2, V. MARINESCU2

Affiliation

  1. Valahia University of Targoviste, Carol I Avenue, No.2, 130024, Targoviste, Romania
  2. National Institute for R&D in Electrical Engineering ICPE-CA, Splaiul Unirii, No. 313, 030138, Bucharest, Romania

Abstract

Bioactive glasses are of particular interest for biomedical applications. This is due to the surface reactivity of these glasses, especially their ability to form active and strong interface with biological tissue. In this paper we present the results from the synthesis of bioactive glass composition, in the ternary system CaO-P2O5-SiO2, obtained by sol – gel process. Also, have been followed the structural changes that occur on the glass surface after soaking in simulated body fluid for 3, 7 and 14 days. Analyses carried out by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) to the soaked samples highlights formation of new phosphocalcic phases such apatite on the glass surface. TG/DSC analysis reveals thermal stability of glass powders analyzed at high temperatures..

Keywords

Sol–gel, Bioactive glasses, In vitro tests, Structural properties, Surface.

Submitted at: March 25, 2013
Accepted at: July 11, 2013

Citation

D. N. UNGUREANU, N. ANGELESCU, A. CATANGIU, V. BRATU, V. DESPA, F. V. ANGHELINA, V. TSAKIRIS, V. MARINESCU, In vitro structural changes on the surface of SiO2 – CaO – P2O5 bioactive glasses, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 744-749 (2013)