Organic/Inorganic bioactive materials Part III: in vitro bioactivity of gelatin/silicocarnotite hybrids |
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| Authors: | Lachezar Radev Maria Helena V Fernandes Isabel Miranda Salvado Daniela Kovacheva |
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| Institution: | (1) Department of Physical Chemistry, Åbo Akademi University, Porthansgatan 3–5, 20500 Turku, Finland;(2) Department of Chemical Technology, Laboratory of Polymer Technology, Helsinki University of Technology, P.O. Box 6100, 02015 Hut, Finland;(3) Institute of Fiber Materials Science, Tampere University of Technology, P.O. Box 589, 33101 Tampere, Finland;(4) Biomaterials Research, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520 Turku, Finland; |
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| Abstract: | In this work we present our experimental results on synthesis, structure evolution and in vitro bioactivity assessment of new gelatin/silicocarnotite hybrid materials. The hybrids were obtained by diluting gelatin (G)
and silicocarnotite (S) ceramic powder with G:S ratios of 75:25 and 25:75 wt.% in hot (40°C) water. The hybrids were characterized
using XRD, FTIR, SEM/EDS and XPS. FTIR depicts that the “red shift” of amide I and COO− could be attributed to the fact that the gelatin prefers to chelate Ca2+ from S. The growth of calcium phosphates on the surface of the hybrids synthesized and then immersed in 1.5 SBF for 3 days
was studied by using of FTIR, XRD and SEM/EDS. According to FTIR results, after an immersion of 3 days, A and B-type CO3HA can be observed on the surface. XRD results indicate the presence of hydroxyapatite with well defined crystallinity. SEM/EDS
of the precipitated layers show the presence of CO3HA and amorphous calcium phosphate on the surface of samples with different G/S content when immersed in 1.5 SBF. XPS of the
G/S hybrid with 25:75 wt.% proved the presence of Ca-deficient hydroxyapatite after an in vitro test for 3 days. |
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