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Cassava starch biodegradable films: Influence of glycerol and clay nanoparticles content on tensile and barrier properties and glass transition temperature

2011; Elsevier BV; Volume: 46; Issue: 1 Linguagem: Inglês

10.1016/j.lwt.2011.10.018

1096-1127

Ana Cristina de Souza, Rafael Viana Benze, E.S. Ferrão, Cynthia Ditchfield, A. C. Vieira Coelho, Carmen C. Tadini,

Lignin and Wood Chemistry

In this study, glycerol content and its incorporation method on tensile and barrier properties of biodegradable films (BF) based on cassava starch were analyzed. ANOVA showed that the glycerol incorporation method did not influence the results (P > 0.05), however the glycerol content influenced significantly the tensile and barrier properties of the films (P < 0.05). Films prepared with lower glycerol content presented better tensile and barrier properties than films with higher content. Films were then prepared with addition of clay nanoparticles and their tensile and barrier properties and glass transition temperature were measured. ANOVA indicated that both glycerol and clay nanoparticles influenced significantly the tensile and barrier properties (P < 0.05), diminishing film permeability when clay nanoparticles were present, while the glass transition temperature was not influenced (P > 0.05).