Novel transparent nanocomposite films based on chitosan and bacterial cellulose

• Autor(es): Fernandes, Susana C. M. ; Oliveira, Lúcia ; Freire, Carmen S. R. ; Silvestre, Armando J. D. ; Neto, Carlos Pascoal ; Gandini, Alessandro ; Desbriéres, Jacques
• Data: 2009
• Identificador Persistente: http://hdl.handle.net/10773/5236
• Origem: RIA - Repositório Institucional da Universidade de Aveiro
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

New nanocomposite films based on different chitosan matrices (two chitosans with different DPs and one water soluble derivative) and bacterial cellulose were prepared by a fully green procedure by casting a water based suspension of chitosan and bacterial cellulose nanofibrils. The films were characterized by several techniques, namely SEM, AFM, X-ray diffraction, TGA, tensile assays and visible spectroscopy. They were highly transparent, flexible and displayed better mechanical properties than the corresponding unfilled chitosan films. These new renewable nanocomposite materials also presented reasonable thermal stability and low O(2) permeability. FCT - SFRH/BD/41388/ 2007 FCT - SFRH/BPD/38515/2007