期刊
JOURNAL OF FOOD ENGINEERING
卷 100, 期 1, 页码 145-151出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jfoodeng.2010.03.039
关键词
Soy protein; Processing; Films; Functional properties
资金
- Diputacion Foral de Gipuzkoa [OF94/2008]
- University of the Basque Country [EHU08/26]
- MICCIN
- Plan E [MAT2009-07735]
Soy protein isolate (SPI) based films are environmentally friendly because they are biodegradable and come from renewable sources but they are brittle. Different ratios of plasticizer were incorporated into SPI-based films to improve mechanical properties. Glycerol has a plasticizing effect on the films in the range of 30-40%. Apart from the plasticizer, the processing method employed to prepare films also influenced on the mechanical properties. Films processed by compression showed much better mechanical properties, higher tensile strength and elongation at break, than the ones processed by casting. Analysis of the thermal properties revealed that denaturation temperatures of the two main globulin fractions present in SPI were influenced by the moisture content of the sample but not by the processing method employed. (C) 2010 Elsevier Ltd. All rights reserved.
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