Nano SiO₂ doping effect on physicochemical properties of PVA-starch bionanocomposite films

Abstract

In this study, starch-PVA based composite films combined with nano SiO₂ were prepared by a solvent casting technique. Different amounts of nano SiO₂ additives were added to starch-PVA films and the results were evaluated. Accordingly, in starch-PVA films containing nano SiO₂ added in the ratio of 1%, 3%, and 5% by mass, nano SiO₂ was homogeneously distributed on the surface of the composite films. However, loss of elasticity was observed in films from containing 3% nano SiO₂ onwards. The unique properties of nanocomposite films obtained with small amounts of nanomaterial reinforcement have been demonstrated. Composite films have been characterized by Fourier-transform infrared spectroscopy, UV–Vis spectrophotometry, and field emission scanning electron microscopy. Fogging tests were compared. Less nano SiO₂ additive in the samples showed the best anti-fogging behavior. This study aims to demonstrate the potential use of starch-PVA nanocomposite films with unique properties in food packaging applications. The surface of starch/PVA films is strengthened by the deposition of SiO₂ nanoparticles.

Graphical Abstract

Keywords:

• Food packaging
• polyvinyl alcohol
• starch
• nano-SiO₂
• solvent-casting
• anti-fogging

Acknowledgments

Authors also thank to the Central Research Laboratory, Bilecik Seyh Edebali University for the characterization measurements.

Disclosure statement

The authors report no declarations of interest.

Research involving human participants and/or animals

This research does not involve Human Participants and/or Animals.

Additional information

Funding

This work was supported by the Bilecik Seyh Edebali University Scientific Research Project Commission financially (project number is 2021-01.BŞEÜ.11-03).