Effects of pH on Properties of Soy Protein Isolate/Guar Gum Composite Films

摘要

The objective of this research was to investigate the effect of pH(7.0,8.0,9.0,10.0) on the properties of soy protein isolate (SPI)/guar gum (GG)composite films casted with 0.2 ％(w/v)guar gum polysaccharide,5.0 ％(w/v)SPI,1.5 ％(w/v)glycerol plasticizer,and 4:1(v/v) mixture of distilled water and anhydrous alcohol.Composite membranes from different pH conditions were evaluated from following aspects:tensile strength (TS),elongation at break (EB),water vapor permeability (WVP),water solubility (WS) and surface hydrophobicity(SH).