Biodegradable Polymers Extracted from "Sargaco": Film Properties and Application to Edible Coating

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2008

Autores

Sousa, A (Autor) Outra; Martins, S (Autor) Outra; Larotonda, FDS (Autor) Outra; L. Hilliou (Autor) REIT; Maria do Pilar Gonçalves (Autor) FEUP; A. M. Sereno (Autor) FEUP

Ata de Conferência Internacional

Título: ADVANCED MATERIALS FORUM IV

Páginas: 548-552

13th Conference of the Sociedade-Portuguesa-de-Materiais/4th International Materials Symposium

Oporto, PORTUGAL, APR 01-04, 2007

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-004-28S

Abstract (EN): "Sargaco" is the name given to a mixture of dead seaweeds collected on Portuguese beaches. "Sargaco" is composed of algae containing biopolymers such as carrageenan, alginate and agar which are extensively used in food and pharmaceutical industries as gelling and stabilizing agents. The objective of this work was the biopolymers extraction from "Sargaco", collected at Leca da Palmeira-Portugal. for production of biodebradable films and subsequent application in edible coatings for food. A mixture of biopolymers was hot-extracted from alkali treated "Sargaco". Films were made from an optimized extract, using the knife coating technique. Films physical properties were characterized and results show that biodegradable films from "Sargaco" are. more hygroscopic, less elastic, more deformable, and more permeable to water than films obtained from a commercial alginate and a domestic k/t-hybrid carrageenan developed during previous studies. As such, this mixture of biopolymers is an. interesting cheap alternative to produce biodegradable materials and a potential application to fresh fruit preservation has been tested.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5