Improvement Physical Properties of Pullulan-Whey Protein Biocomposite Films with Nanoclay

In the current study, whey protein- pullulan- clay nanocomposite films are prepared by casting method. The effect of nanoclay at three concentrations (1%, 3% and 5%) on physical properties such as moisture content, solubility in water, water vapor permeability and transparency of whey protein- pullulan composite films investigated. The results show that the effect of nanoparticles on composite depends on kind of nanoparticle and level of incorporation. Nanoclay particles changed solubility, water absorption and moisture content of the films but did not influence on transparency.