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بازدید:29611   بروزرسانی: 15-01-1402

Iman Shahabi-Ghahfarrokhi

Mahbobeh Hassannia-Kolaee, Faramarz Khodaiyan, Rezvan Pourahmad, Iman Shahabi-Ghahfarrokhi
Development of ecofriendly bionanocomposite: whey protein isolate/pullulan films with nano-SiO2
Development of ecofriendly bionanocomposite: whey protein isolate/pullulan films with nano-SiO2
چکيده


During the past decays, the limitation of petroleum based polymer, the high price of oil, and the environmental concern was attracted the attention of researcher to develop biobased polymers. The composition of different biopolymers and the reinforcement with nano filer are common methods to improve the drawbacks of biopolymers. In this study whey protein isolate/pullulan (WPI/PUL) films contain 1%, 3%, and 5% (w/w) nano-SiO2 (NS) were prepared by a casting method. Tensile strength of nanocomposite films increased after increasing NS content, but elongation at break decreased, simultaneously. Water absorption, moisture content, solubility in water improved in the wake of increasing NS content because NS increasethe cohesiveness of the polymer matrix and improved the barrier and water resistance properties of the films. water vapor permeability of film specimens decresed by increasing NS content. Uniform distribution of NS into polymer matrix was confirmed by scanning electron microscopy (SEM). XRD pattern and thermal analysis revealed increasing crystallinity and increasing Tg of film specimens with increasing NS content, respectively. According to our result WPI/PUL/NS films possess potential to be used as environment friendly packaging films to improve shelf life of food and can be used as promising alternative to petroleum based packaging films.