Development and characterization of composite edible films based on sodium alginate and pectin

被引:335
作者
Galus, Sabina [1 ]
Lenart, Andrzej [1 ]
机构
[1] Warsaw Univ Life Sci SGGW, Fac Food Sci, Dept Food Engn & Proc Management, 159C Nowoursynowska St, PL-02776 Warsaw, Poland
关键词
Edible films; Alginate; Pectin; Moisture; Mechanical properties; Microstructure; WATER-VAPOR PERMEABILITY; MECHANICAL-PROPERTIES; PHYSICAL-PROPERTIES; BARRIER PROPERTIES; MUSCLE PROTEINS; CAST FILMS; PLASTICIZER; BEHAVIOR; TEMPERATURE; GELATION;
D O I
10.1016/j.jfoodeng.2012.03.006
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The objective of this study was to characterize physical properties including thickness, colour, water vapour sorption kinetics and isotherms, water vapour permeability, tensile strength, elongation at break, and microstructure of composite films prepared by casting sodium alginate and low methoxy pectin at proportions of: 100-0%, 75-25%, 50-50%, 25-75%, and 0-100%. Combination of both polysaccharides gave continuous, homogenous and transparent films. All of analyzed films reached their state of equilibrium within the 24 h of adsorption time. Water sorption isotherms for all films had a sigmoidal shape and were not influenced by the film composition. Sorption kinetics and isotherms indicated hydrophilic character of investigated films. Statistically significant (p < 0.001) correlations were found between colour, water vapour permeability, tensile strength, elongation at break, and chemical composition (alginate and pectin) of composite films. A different internal arrangement was observed as a function of film composition. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:459 / 465
页数:7
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