Influence of Drying Conditions on Physical Properties of Alginate Films

Autor(es)

da Silva, Mariana Altenhofen ^[1] ; Krause Bierhalz, Andrea Cristiane ^[1] ; Kieckbusch, Theo Guenter ^[1]

Afiliação do(s) autor(es)

^[1] Univ Campinas UNICAMP, Sch Chem Engn, BR-13083852 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Drying Technology; v. 30, n. 1, p. 72-79, 2012.
• Citações Web of Science: 14

Resumo

The effect of drying conditions of the film-forming solution on thickness, moisture content, water vapor permeability, and tensile properties of alginate films were investigated. A long period of constant rate was observed in all conditions and the model proposed by Wang and Singh was able to adjust the drying data. As expected, there was a clear effect of temperature on drying kinetics; that is, increasing the drying temperature decreased the drying time. Considerable glycerol losses were observed when alginate gel was oven dried at temperatures above 40 degrees C. Compared to other drying conditions, films oven dried at 60 degrees C were thinner, had lower moisture content, and were less flexible. (AU)

• Processo FAPESP: 08/52830-9 - Confecção e caracterização de biofilmes ativos à base de pectina BTM e de pectina BTM/alginato reticulados com cálcio
• Beneficiário: Andrea Cristiane Krause Bierhalz
• Modalidade de apoio: Bolsas no Brasil - Mestrado