Sorbitol- vs Glycerol-Plasticized Whey Protein Edible Films: Integrated Oxygen Permeability and Tensile Property Evaluation

Abstract

The present study in its form, “Obtaining and evaluating blankets and rubber latex blankets of Shiringa (Hevea brasiliensis), in the district of Chazuta - San Martín was developed in the Faculty of Agroindustrial Engineering, Laboratory of Research and Non-Food Agroindustrial Products Technology, from the National University of San Martín - Tarapoto. This study aimed at evaluating the concentrations of sulfur and new acids that influence the improvement of products derived from blankets and rubber latex blankets, analyzing and comparing the physical characteristics of finished products in color, elasticity and impurity content. The samples were located and extracted from the Bristol Concession Zone at vertices 1 to 4, located in the East between 374182 - 375851 and North 9277492 - 9277511, at the UTM coordinates of the total area requested and concessioned Zone 18, WGS 84 in the Chazuta district. To evaluate the influence of the type of acid and its concentration on the physical and mechanical quality of the blankets, a Randomized Complete Design was performed, with a factorial arrangement (3 * 3) with two factors (type of acid and its concentration) and 3 levels for the acid type factor (citric, formic and acetic) and the concentrations of (1 ml, 3 ml and 5 ml) and, for the rubber latex blankets, a Randomized Complete Design was applied, which analyzes the concentrations of sulfur (0.5%; 1 , 0% and 2.0%). Mechanical properties were measured using a Brookield CT3 model. The concentrations of acetic, formic and citric acids influenced statistically (P <0.01) in the behavior of rubber latex blankets. The treatments T8 (3 ml acetic acid of concentration) and T7 (acetic acid at 1 ml.) presented higher average with respect to mechanical properties, and the T2 and T3 presented physical properties. The sulfur concentrations, considered in this research work, did not influence statistically (P <0.01) on the mechanical properties of the rubber latex blankets. The blankets and rubber latex blankets using different acids (citric, formic, acetic acids) and sulfur concentrations are statistically differentiated in their physical characteristics of color, elasticity and impurities.