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Foods 2018, 7(4), 53;

Influence of Codium tomentosum Extract in the Properties of Alginate and Chitosan Edible Films

MARE—Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, 2520-641 Peniche, Portugal
Centre for Rapid and Sustainable Product Development (CDRsp), Instituto Politécnico de Leiria, 2430-028 Marinha Grande, Portugal
I3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
INEB-Instituto de Engenharia Biomédica, Universidade do Porto, 4150-180 Porto, Portugal
Author to whom correspondence should be addressed.
Received: 26 January 2018 / Revised: 17 March 2018 / Accepted: 27 March 2018 / Published: 1 April 2018
(This article belongs to the Special Issue Edible Films Characterization and Application in Foods)
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The growing search for natural alternatives to synthetic food packaging materials and additives has increased, and seaweed extracts’ bioactivity has made them suitable candidates for incorporation in novel edible films. This study aims to investigate the effect of Codium tomentosum seaweed extract (SE) incorporation in alginate and chitosan edible films. Alginate- and chitosan-based films with and without the incorporation of 0.5% SE were characterized according to their physical, optical, mechanical, and thermal properties. Seaweed extract incorporation in chitosan films resulted in an increase of film solubility (50%), elasticity (18%), and decrease of puncture strength (27%) and energy at break (39%). In alginate films, the extract incorporation significantly decreased film solubility (6%), water vapour permeability (46%), and elasticity (24%), and had no effect on thermal properties. Depending on the type of application, the addition of SE in edible films can bring advantages for food conservation. View Full-Text
Keywords: packaging materials; edible films; seaweeds; chitosan; alginate; natural; additive packaging materials; edible films; seaweeds; chitosan; alginate; natural; additive

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Augusto, A.; Dias, J.R.; Campos, M.J.; Alves, N.M.; Pedrosa, R.; Silva, S.F.J. Influence of Codium tomentosum Extract in the Properties of Alginate and Chitosan Edible Films. Foods 2018, 7, 53.

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