Optimization of Pullulan-Gelatin Composite Films by Response Surface Analysis

Abstract

Abstract: The aim of the present study was to optimize the formulation of pullulan-gelatin composite films using one-factor-at-time design and response surface methodology. The tensile strength of pullulan-gelatin composite films was affected most by glycerol concentration and least by pullulan concentration. Pullulan-gelatin composite films composed of 2% pullulan, 5% gelatin and 1% glycerol showed the highest tensile strength. A relative error of 5.18% was found between the actual (89.83 MPa) and predicted (85.18 MPa) tensile strength, suggesting high reliability of the optimized formulation.

Key words: pullulan, gelatin, edible film, tensile strength, response surface analysis

CLC Number:

TS201

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