Factors Affecting the Properties of Edible Film Prepared from Mung Bean Proteins.

Abstract

This research investigated the factors affecting the properties of edible film prepared from mungbean protein (Vigna radiate (L.) Wilczek). The effects of pH, heating temperature and heating time of the film-solution on various film properties were determined using Response Surface Methodology (RSM). Generally, the impact of pH and heating temperature were the most significant on the film’s properties’in comparison to heating time. The tensile strength was highest at pH 9.5 at 75oC (5.70- 6.51 MPa) but low in elongation at break (32.06- 40.08%). Under these conditions, the water vapor permeability, films solubility and proteins solubility were at their lowest (11.37- 16.91 g.mm/m2.day.kPa, 37.53- 39.43% and 19.26- 27.00%, respectively). Film color was darker and more yellowish with increase in the pH and heating temperature of film-solution.