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Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites

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Abstract

New 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.

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Acknowledgements

Financial support from Brazilian agencies “Fundação de amparo a pesquisa do estado de São Paulo (FAPESP), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)” and “Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)” and technical support from Electron Microscopy Laboratory/National Synchrotron Light Laboratory (LME/LNLS) are acknowledged.

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Authors and Affiliations

  1. Chemistry Institute, São Paulo State University-UNESP, São Paulo, Brazil

    Elaine R. P. Pinto, Hernane S. Barud, Sidney J. L. Ribeiro & Younès Messaddeq

  2. Chemistry Institute, São Paulo University-USP, São Carlos, Brazil

    Wagner Luiz Polito

Authors
  1. Elaine R. P. Pinto
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  2. Hernane S. Barud
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  3. Wagner Luiz Polito
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  4. Sidney J. L. Ribeiro
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  5. Younès Messaddeq
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Correspondence to Elaine R. P. Pinto.

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Pinto, E.R.P., Barud, H.S., Polito, W.L. et al. Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites. J Therm Anal Calorim 114, 549–555 (2013). https://doi.org/10.1007/s10973-013-3001-y

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  • DOI: https://doi.org/10.1007/s10973-013-3001-y

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