Effect of freezing on physical properties of whey protein emulsion films

The objective of this work was to study the effect of the freezing process on physical properties of whey protein emulsion films with different beeswax content dried at 5 °C. Thickness, microstructure, water vapour permeability, solubility in water, sorption isotherms and mechanical properties were...

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Autores principales: Soazo, Marina del Valle, Pérez, Leonardo Martín, Rubiolo, Amelia Catalina, Verdini, Roxana Andrea
Formato: article artículo
Lenguaje:Inglés
Publicado: Elsevier 2019
Materias:
Whey protein emulsion films
Beeswax
Freezing
Physical properties
Acceso en línea:http://hdl.handle.net/2133/13919
http://hdl.handle.net/2133/13919
Aporte de:
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario
id I15-R121-2133-13919
record_format dspace
institution Universidad Nacional de Rosario
institution_str I-15
repository_str R-121
collection Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR)
language Inglés
orig_language_str_mv eng
topic Whey protein emulsion films
Beeswax
Freezing
Physical properties
spellingShingle Whey protein emulsion films
Beeswax
Freezing
Physical properties
Soazo, Marina del Valle
Pérez, Leonardo Martín
Rubiolo, Amelia Catalina
Verdini, Roxana Andrea
Effect of freezing on physical properties of whey protein emulsion films
topic_facet Whey protein emulsion films
Beeswax
Freezing
Physical properties
description The objective of this work was to study the effect of the freezing process on physical properties of whey protein emulsion films with different beeswax content dried at 5 °C. Thickness, microstructure, water vapour permeability, solubility in water, sorption isotherms and mechanical properties were measured in Control and Frozen films. The freezing process did not cause fractures or perforations in films, but films with beeswax showed a change in the appearance of the lipids after freezing. Only films with 40% of beeswax showed a significant increase in the water vapour permeability after freezing. The freezing process did not affect film solubility in water but produced small differences in the equilibrium moisture content values. In the puncture test, the freezing process increased puncture strength and deformation of films without beeswax but those parameters were not affected in films with beeswax. In tensile test, tensile strength and elastic modulus decreased, but elongation was not affected by freezing process. Principal component analysis accomplished an adequate condensation of the date grouping samples according to film formulation and treatment (Control and Frozen films). Indeed, the relationships of sample grouping and measured parameters were enlightened by principal component analysis. In conclusion, whey protein emulsion films were resistant to the freezing process (freezing, frozen storage and thawing) and could be a good alternative as a treatment to preserve the quality of frozen foods.
format article
artículo
author Soazo, Marina del Valle
Pérez, Leonardo Martín
Rubiolo, Amelia Catalina
Verdini, Roxana Andrea
author_facet Soazo, Marina del Valle
Pérez, Leonardo Martín
Rubiolo, Amelia Catalina
Verdini, Roxana Andrea
author_sort Soazo, Marina del Valle
title Effect of freezing on physical properties of whey protein emulsion films
title_short Effect of freezing on physical properties of whey protein emulsion films
title_full Effect of freezing on physical properties of whey protein emulsion films
title_fullStr Effect of freezing on physical properties of whey protein emulsion films
title_full_unstemmed Effect of freezing on physical properties of whey protein emulsion films
title_sort effect of freezing on physical properties of whey protein emulsion films
publisher Elsevier
publishDate 2019
url http://hdl.handle.net/2133/13919
http://hdl.handle.net/2133/13919
work_keys_str_mv AT soazomarinadelvalle effectoffreezingonphysicalpropertiesofwheyproteinemulsionfilms
AT perezleonardomartin effectoffreezingonphysicalpropertiesofwheyproteinemulsionfilms
AT rubioloameliacatalina effectoffreezingonphysicalpropertiesofwheyproteinemulsionfilms
AT verdiniroxanaandrea effectoffreezingonphysicalpropertiesofwheyproteinemulsionfilms
bdutipo_str Repositorios
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