J M F Ferreira

Publications (2)4.29 Total impact

• Article: Surface modifications of alumina-silica glass fiber.

  A L Andrade, J M F Ferreira, R Z Domingues
  [show abstract] [hide abstract]
  ABSTRACT: A commercial glass fiber with Al(2)O(3) (68.4%) and SiO(2) (27.6%) as major components and CaO, TiO(2), Fe(2)O(3), and CuO as minor components was used as substrate in a silica sol-gel coating process. After cleaning, fiber samples were immersed into tetraethoxysilane (TEOS) at room temperature for 1 h, and then individual fiber samples were soaked into a simulated body fluid (SBF) solution,1 and removed after 5, 10, 15, and 20 days. Zeta potential and Energy Dispersive Spectroscopy (EDS) analyses showed that the fiber surfaces were effectively coated with a silica layer, which improved the formation of an HA layer upon immersion into SBF solution for 5 days. The coating became even more continuous after 10-day immersion. Fourier Transform Infrared Spectroscopic (FTIR) analyses confirmed that the coating layer has P--O vibration bands characteristic of hydroxyapatite (HA) near 1060 and 600 cm(-1).
  Journal of Biomedical Materials Research Part B Applied Biomaterials 09/2004; 70(2):378-83. · 2.15 Impact Factor
• Article: Surface modifications of alumina–silica glass fiber

  A.L. Andrade, J.M.F. Ferreira, R.Z. Domingues
  [show abstract] [hide abstract]
  ABSTRACT: A commercial glass fiber with Al2O3 (68.4%) and SiO2 (27.6%) as major components and CaO, TiO2, Fe2O3, and CuO as minor components was used as substrate in a silica sol–gel coating process. After cleaning, fiber samples were immersed into tetraethoxysilane (TEOS) at room temperature for 1 h, and then individual fiber samples were soaked into a simulated body fluid (SBF) solution,1 and removed after 5, 10, 15, and 20 days. Zeta potential and Energy Dispersive Spectroscopy (EDS) analyses showed that the fiber surfaces were effectively coated with a silica layer, which improved the formation of an HA layer upon immersion into SBF solution for 5 days. The coating became even more continuous after 10-day immersion. Fourier Transform Infrared Spectroscopic (FTIR) analyses confirmed that the coating layer has PO vibration bands characteristic of hydroxyapatite (HA) near 1060 and 600 cm−1. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 70B: 378–383, 2004
  Journal of Biomedical Materials Research Part B Applied Biomaterials 08/2004; 70B(2):378 - 383. · 2.15 Impact Factor