Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 48, Issue 4, Pages 1064-1069Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf9813891
Keywords
pea protein; film; mechanical properties; barrier properties
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The conditions for protein film preparation from an alkaline dispersion of a pea protein isolate were investigated in the presence of polyols as plasticizers. Mechanical and hastier properties of resulting films were studied as a function of protein dispersion conditions, protein and plasticizer concentrations and ratios, chain length of the plasticizer, and pH and composition of the alkaline medium. Neither the mode of protein hydration nor the pea isolate origin had a significant effect on the mechanical properties of pea protein films. However, increasing the plasticizer chain length. induced slightly higher surface hydrophobicity but poor mechanical properties. Addition of monoglycerides to film-forming solution allowed a significant improvement of the films during aging. Both tensile strength and surface hydrophobicity increased when ammonium hydroxide was used as protein dispersing agent instead of sodium, hydroxide.
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