Abstract

GONZALEZ-LINARES, Jairo I; MEDINA-VIVANCO, Mari L; GARAY-MONTES, Richer  and  MENDIETA-TABOADA, Oscar W. Development of Edible Films from Proteins Extracted from Inka Peanut Kernel Cake (Plukenetia volubilis L.). Inf. tecnol. [online]. 2017, vol.28, n.5, pp.115-130. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642017000500013.

The objective of this study was to evaluate the use proteins extracted from the Inka Peanut kernel cake (Plukenetia volubilis L.) to elaborate edible films. Alkaline solutions were used at different pH values and acid precipitation to determine the maximum protein extraction. The film forming solutions, composed of lyophilized proteins, sorbitol and water were heat treated and dried. The resulting films were subjected to evaluation of their physical properties (color, water solubility, water vapor permeability, thickness and moisture content) to determine how they are influenced by protein and sorbitol concentration. The protein yield was maximal at pH 12. Both protein and sorbitol concentration had significant effects on the physical properties of the films (p<0.05). A suitable combination of protein and sorbitol was established to obtain films of low solubility and permeability. These results demonstrate that Inka Peanut proteins can be used as biodegradable/edible film forming material.

Keywords : Plukenetia volubilis; films; proteins; kernel cake; physical properties.

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