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Polímeros

versão impressa ISSN 0104-1428

Resumo

MACEA, Richar Blanquicet et al. Synthesis and film properties of chitosan and whey. Polímeros [online]. 2015, vol.25, n.1, pp.58-69. ISSN 0104-1428.  https://doi.org/10.1590/0104-1428.1558.

Chitosan is a natural polymer derived from deacetylation of chitin, which exhibits properties such as biocompatibility, biodegradability and may form films, being applied in the food industry and medicine. Degradable chitosan films were prepared from chitosan extracted from shrimp shells and whey, using different concentrations of chitosan solution (1, 1.5, and 2% v/v), with (4:20, 6:20 and 8:20 v/v) whey proportions, for 4.5, 5.0 and 5.5 h at 60°C. Chitin extracted previously from shrimp shells was treated with a solution of 50% of NaOH to obtain chitosan with 80.72% deacetylation degree. This chitosan was dissolved in 1% (v/v) acetic acid, leading to the solutions that were then combined with whey. The films were characterized with infrared spectroscopy, and had thickness, density, solubility, transparency, swelling and degradability evaluated. The solubility and degradability of chitosan/whey films decreased with increasing chitosan concentration. The proportion of lactic serum affects the film swelling, and the thickness and density increased with whey relative concentration.

Palavras-chave : chitosan; whey; films; solubility; degradation.

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