Barud, H. S.Ribeiro, Clovis Augusto [UNESP]Crespi, Marisa Spirandeli [UNESP]Martines, M. A. U.Dexpert-Ghys, J.Marques, Rodrigo Fernando Costa [UNESP]Messaddeq, Younes [UNESP]Ribeiro, Sidney José Lima [UNESP]2014-05-202014-05-202007-03-01Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 87, n. 3, p. 815-818, 2007.1388-6150http://hdl.handle.net/11449/35288Cellulose-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), P-31-nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry (TG) and thermomechanical analysis (TMA). From XRD analyses the I alpha and I beta cellulose crystalline phases were identified together with crystalline sodium phosphate that covers the cellulose microfibrils as revealed by SEM. P-31 NMR spectra show peaks assigned to Q(0) and Q(1) phosphate structures to be compared to the Q(2) 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.815-818engbacterial cellulosecellulose-phosphate compositessodium polyphosphateArtigo10.1007/s10973-006-8170-5WOS:000244823700041Acesso restrito849831089181008274713101139991402115942621694174299850384191781564460474630346540000-0002-7984-59080000-0003-3286-94400000-0003-0195-3885