caa a22 4500 46322406X CHVBK 20180405153221.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-0524-7 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0524-7 MAS-NMR studies of geopolymers heat-treated for applications in biomaterials field [Elektronische Daten] [H. Oudadesse, A. Derrien, M. Lefloch, J. Davidovits] In the field of biomaterials applied in bony restoration, systems based on amorphous silicate network present the ability to link to bone matrix. Amorphous geopolymers of the potassium-poly(sialate)-nanopolymer type with a mole ratio Si:Al=31 were studied for their use as potential biomaterials. This implied a heat treatment at 500°C in order to reduce the alkalinity of the geopolymer matrix from pH 11.5 to pH 7.1 and to provide high porosity for biological compatibility. 27Al and 29Si MAS NMR spectroscopy has been used to characterise the foamed geopolymers obtained after different thermal treatments at 250 and 500°C, and with three different mole ratios K2O/SiO2 for the potassium silicate: 0.54; 0.67 and 0.84. Best results in terms of biological compatibility were obtained with a geopolymer matrix resulting from a mole ratio K2O/SiO2. of 0.54, heat-treated at 500°C. Springer Science+Business Media, LLC, 2006 Oudadesse H. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut Derrien A. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut Lefloch M. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut Davidovits J. Geopolymer Institute, 16 rue Galilée, 02100, Saint-Quentin, France aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3092-3098 0022-2461 42:9<3092 2007 42 10853 https://doi.org/10.1007/s10853-006-0524-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0524-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oudadesse H. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut NATIONALLICENCE 700 1- Derrien A. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut NATIONALLICENCE 700 1- Lefloch M. Cristallochimie et Biomatériaux, Université de Rennes1, Institut de Chimie, CNRS UMR 6226, Campus de Beaulieu, 263 av. du Général Leclerc, 35042, Rennes, France aut NATIONALLICENCE 700 1- Davidovits J. Geopolymer Institute, 16 rue Galilée, 02100, Saint-Quentin, France aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3092-3098 0022-2461 42:9<3092 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer