Abstract
The objective of this study was to apply rice bran protein hydrolysates (RBH) as bioactive additives of gelatin/Eudragit® NE 30D film and characterize the physicochemical and mechanical properties of its. The RBH was obtained by extraction with 2% sodium chloride (RBH-NaCl) and 0.1 N sodium hydroxide (RBH-NaOH) followed by digestion with Alcalase®. Then, RBH was incorporated in gelatin/Eudragit® NE 30D film. Effect of RBHs on film thickness, moisture content, pH, Young's modulus, tensile strength and the elongation at break were investigated. The RBH-NaCl enriched film showed non-homogeneous mixture and reduced moisture content, tensile strength and the elongation at break (1.8 – 2 folds). However, the RBH-NaOH enriched film exhibited a few non-homogeneous mixture and the Young's modulus was slightly decreased. The pH value was increased in the range of 6.77 – 6.88. Our results provide insight for the potential to develop RBH containing films as topical products.
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