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On-line version ISSN 1678-4596
MACHADO, Bruna Aparecida Souza; NUNES, Itaciara Larroza; PEREIRA, Fabiano Vargas and DRUZIAN, Janice Izabel. Development and evaluation of the effectiveness of biodegradable films of cassava starch with nanocelulose as reinforcement and yerba mate extract as an additive antioxidant. Cienc. Rural [online]. 2012, vol.42, n.11, pp.2085-2091. ISSN 1678-4596. http://dx.doi.org/10.1590/S0103-84782012001100028.
The objective was to develop biodegradable packaging using a polymer matrix as the cassava starch plasticized with glycerol and reinforced with the incorporation of nanocelulose of coconut fiber, as well as to evaluate the effect of the addition of an additive nature (yerba mate) in nanobiocompósitos formulations with antioxidant action. The nanocrystal cellulose (L/D=39) were obtained by acid hydrolysis with 65% H2SO4. The films were prepared by casting containing 4.5 and 6.0% starch, 0.5 and 1.5% glycerol, 0.3% nanocelulose and 20% extract of yerba mate. The palm oil storage packed with films containing the additive was monitored for 40 days under conditions of accelerated oxidation (63%UR/30°C). It was found that as the losses increase polyphenol films, there is a smaller increase of the peroxide value of the packaged product, thus demonstrating that instead of the product, the compounds of the package's who are suffering oxidation. The incorporation of yerba mate extract did not alter the mechanical and barrier properties of these films.
Keywords : active packaging; polyphenols; nanobiocompósitos; cellulose nanocrystals.