Effects of flaxseed gum addition and drying conditions on creep-recovery properties and water vapour transmission rate of starch-based films

This study investigated the effect of different concentrations of flaxseed gum (0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%) and various drying conditions (40 °C, 60 °C, 80 °C) on creep-recovery property and water vapor transmission rate (WVTR) of a starch-based films composed of cornstarch, flaxseed gum and glycerol. In creep-recovery tests, the data were modeled by Berger model. Results showed that E₂ and ?₁ of different flaxseed gum concentrations all decreased with an increase of flaxseed gum concentration first and then increased in both creep and recovery tests. Increasing drying temperature decreased E₂ and ?₁ in both creep and recovery tests. The addition of flaxseed gum increased WVTR compared with the flaxseed gum free sample. Films under different drying conditions displayed similar WVTR.