caa a22 4500 463192877 CHVBK 20180406164914.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10973-006-8170-5 doi (NATIONALLICENCE)springer-10.1007/s10973-006-8170-5 Thermalcharacterization of bacterial cellulose-phosphate composite membranes [Elektronische Daten] [H. Barud, C. Ribeiro, Marisa Crespi, M. Martines, J. Dexpert-Ghys, R. Marques, Y. Messaddeq, S. Ribeiro] Cellulose-phosphate composite membranes have been prepared from bacterial cellulose membranes (BC) and sodium polyphosphate solution. The structure and thermal behavior of the new composites were evaluated by X-ray diffraction (XRD), 31P-nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry (TG) and thermomechanical analysis (TMA). From XRD analyses the Iα and Iβ cellulose crystalline phases were identified together with crystalline sodium phosphate that covers the cellulose microfibrils as revealed by SEM. 31P NMR spectra show peaks assigned to Q0 and Q1 phosphate structures to be compared to the Q2 units that characterize the precursor polyphosphate. Glass transition temperature, T g, obtained from TMA curves and thermal stability obtained from TG and DSC measurements, were observed to be dependent on the phosphate content. Springer-Verlag, 2007 bacterial cellulose nationallicence cellulose-phosphate composites nationallicence sodium polyphosphate nationallicence Barud H. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Ribeiro C. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Crespi Marisa Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Martines M. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Dexpert-Ghys J. Centre d'Elaboration de Matériaux et d'Etudes Structurales, UPR N°8011, Université Toulouse III, 29 rue Jeanne Marvig, B.P. 94347, 31055, Toulouse Cedex, France aut Marques R. Centre d'Elaboration de Matériaux et d'Etudes Structurales, UPR N°8011, Université Toulouse III, 29 rue Jeanne Marvig, B.P. 94347, 31055, Toulouse Cedex, France aut Messaddeq Y. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Ribeiro S. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 87/3(2007-03-01), 815-818 1388-6150 87:3<815 2007 87 10973 https://doi.org/10.1007/s10973-006-8170-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-8170-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Barud H. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 700 1- Ribeiro C. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 700 1- Crespi Marisa Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 700 1- Martines M. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 700 1- Dexpert-Ghys J. Centre d'Elaboration de Matériaux et d'Etudes Structurales, UPR N°8011, Université Toulouse III, 29 rue Jeanne Marvig, B.P. 94347, 31055, Toulouse Cedex, France aut NATIONALLICENCE 700 1- Marques R. Centre d'Elaboration de Matériaux et d'Etudes Structurales, UPR N°8011, Université Toulouse III, 29 rue Jeanne Marvig, B.P. 94347, 31055, Toulouse Cedex, France aut NATIONALLICENCE 700 1- Messaddeq Y. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 700 1- Ribeiro S. Instituto de Quimica, UNESP, CP 355, 14801-970, Araraquara, Brazil aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers 87/3(2007-03-01), 815-818 1388-6150 87:3<815 2007 87 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer