Influence of sorghum wax, glycerin, and sorbitol on physical properties of soy protein isolate films

Ki Myong Kim; David B. Marx; Curtis L. Weller; Milford A. Hanna

doi:10.1007/s11746-003-0653-9

Influence of sorghum wax, glycerin, and sorbitol on physical properties of soy protein isolate films

Ki Myong Kim, David B. Marx, Curtis L. Weller, Milford A. Hanna

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Research output: Contribution to journal › Article

35 Scopus citations

Abstract

Sorghum wax, sorbitol, glycerin, and soy protein isolate (SPI) composite films were prepared. Effects of sorghum wax, sorbitol, and glycerin concentrations on various films were evaluated using response surface methodology. All independent variables significantly (P < 0.05) affected film water vapor permeability (WVP), tensile strength (TS), elongation at break (E), total color difference, and total soluble matter (TSM). Increasing the sorghum wax concentration decreased WVP and E. As sorbitol content increased in the composite films, WVP and TS increased. Sorbitol had a critical point of 2-5 g/5 g SPI for low values of TSM. The addition of sorbitol contributed more to the properties of the film than did glycerin.

Original language	English (US)
Pages (from-to)	71-76
Number of pages	6
Journal	JAOCS, Journal of the American Oil Chemists' Society
Volume	80
Issue number	1
DOIs	https://doi.org/10.1007/s11746-003-0653-9
State	Published - Jan 2003

Keywords

Edible films
RSM design
Sorghum wax
Soy protein isolate
Water vapor permeability

ASJC Scopus subject areas

Chemical Engineering(all)
Organic Chemistry

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