Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/861
Type: Artigo de periódico
Title: Effect of chemical treatment on the mechanical properties, water vapour permeability and sorption isotherms of gelatin-based films
Author: CARVALHO, R. A.
GROSSO, C. R. F.
SOBRAL, P. J. A.
Abstract: Proteins contain hydrophilic groups, which can bind to water molecules through hydrogen bridges, resulting in water vapour adsorption. An increase in the degree of cross-linking can be a method to improve the cohesiveness force and functional properties of protein-based films. Thus, the objective of this work was to evaluate the effect of chemical treatment of gelatin with formaldehyde and glyoxal on the mechanical properties, water vapour permeability (WVP) and water vapour sorption characteristics of gelatin-based films. Films were produced using gelatin, with and without chemical treatment. The formaldehyde treatments caused a significant increase in the tensile strength and a reduction in the WVP of films. The Guggenheim-Anderson-De Boer and Halsey models could be used to model the sorption isotherms of films. It was observed that an increase in temperature produced a decrease in water sorption, and the chemical modifications did not affect the monolayer moisture content. Copyright (c) 2007 John Wiley & Sons, Ltd.
Subject: physical properties
protein
cross-link
formaldehyde
glyoxal
Country: Inglaterra
Editor: JOHN WILEY & SONS LTD
Rights: fechado
Identifier DOI: 10.1002/pts.792
Address: http://dx.doi.org/10.1002/pts.792
http://apps.isiknowledge.com/InboundService.do?Func=Frame&product=WOS&action=retrieve&SrcApp=EndNote&UT=000255768100005&Init=Yes&SrcAuth=ResearchSoft&mode=FullRecord
Date Issue: 2008
Appears in Collections:FEA - Artigos e Outros Documentos

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