Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-27T11:28:26Z
dc.date.available2014-05-27T11:28:26Z
dc.date.created2014-05-27T11:28:26Z
dc.date.issued2013-02-12
dc.identifierJournal of Thermal Analysis and Calorimetry, p. 1-7.
dc.identifier1388-6150
dc.identifier1572-8943
dc.identifierhttp://hdl.handle.net/11449/74586
dc.identifier10.1007/s10973-013-3001-y
dc.identifierWOS:000325704200010
dc.identifier2-s2.0-84873436815
dc.identifier2998503841917815
dc.description.abstractNew nanocomposites based on bacterial cellulose nanofibers (BCN) and polyurethane (PU) prepolymer were prepared and characterized by SEM, FT-IR, XRD, and TG/DTG analyses. An improvement of the interface reaction between the BCN and the PU prepolymer was obtained by a solvent exchange process. FT-IR results showed the main urethane band at 2,270 cm-1 to PU prepolymer; however, in nanocomposites new bands appear as disubstituted urea at 1,650 and 1,550 cm-1. In addition, the observed decrease in the intensity of the hydroxyl band (3,500 cm-1) suggests an interaction between BCN hydroxyls and NCO-free groups. The nanocomposites presented a non-crystalline character, significant thermal stability (up to 230 °C) and low water absorption when compared to pristine BCN. © 2013 Akadémiai Kiadó, Budapest, Hungary.
dc.languageeng
dc.relationJournal of Thermal Analysis and Calorimetry
dc.relation2.209
dc.relation0,587
dc.rightsAcesso restrito
dc.sourceScopus
dc.subjectBacterial cellulose nanofibers
dc.subjectNanocomposites
dc.subjectPolyurethane prepolymer
dc.titlePreparation and characterization of the bacterial cellulose/polyurethane nanocomposites
dc.typeArtículos de revistas


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