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https://hdl.handle.net/1822/16817
Título: | Influence of α-tocopherol on physicochemical properties of chitosan-based films |
Autor(es): | Martins, Joana Cerqueira, M. A. Vicente, A. A. |
Palavras-chave: | Chitosan Biodegradable Edible film Antioxidant activity Physical properties |
Data: | 2012 |
Editora: | Elsevier Ltd. |
Revista: | Food Hydrocolloids |
Resumo(s): | tosan has been exploited as a material for the development of edible films, and additionally can be used as a carrier of functional compounds such as α-tocopherol. The aim of this work was to evaluate the effects of the incorporation of α-tocopherol in chitosan-based films. FTIR and thermal analyses were performed and showed that the incorporation of α-tocopherol affects the chemical structure of chitosan-based films with the establishment of new chemical bonds and the decrease of crystallinity. Results also showed that the increase of α-tocopherol concentration promotes a decrease of water content (from 12.6 to 11.4%) of the films. The addition of α-tocopherol to chitosan films leads to a significant reduction (p < 0.05) of tensile strength from 34.06 to 16.24 MPa, and elongation-at-break from 53.84 to 23.12%. Film opacity values (ranging from 4.74 to 7.83%) increased when α-tocopherol was incorporated into the film. Antioxidant capacity of chitosan-based films was evaluated and was enhanced when α-tocopherol was present in the film matrix. Results showed that α-tocopherol can be successfully added to the chitosan films enhancing the final quality and shelf-life extension of food products. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/16817 |
DOI: | 10.1016/j.foodhyd.2011.06.011 |
ISSN: | 0268-005X |
Versão da editora: | http://www.sciencedirect.com/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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science.pdf | 954,44 kB | Adobe PDF | Ver/Abrir |