Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 106, Issue -, Pages 661-669Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2017.08.058
Keywords
UV radiation; Starch; Nano TiO2
Funding
- University of Zanjan
- Iran Nanotechnology Initiative Council
Ask authors/readers for more resources
In current study, starch/TiO2 bionanocomposites were produced by photochemical reactions as a biodegradable food packaging material. Physical, mechanical, thermal and water-vapor permeability properties were investigated. Then, the photo-degradation properties of nanocomposite films were studied. This is the first report of the photo-producible and photo-degradable bionanocomposite as a food packaging material. Film-forming solutions were exposed to ultraviolet A (UV-A) for different times. Our results showed that UV-A irradiation increased the hydrophobicity of starch films. With increasing UV-A exposure time, tensile strength and Young's modulus of the specimens were decreased. On the other hand, elongation at break of the films was increased with increasing UV-A irradiation. The glass transition temperature and melting point of the films were increased by increasing UV-A exposure time. Nevertheless, the results showed that photo-degradation properties of photo-produced starch/TiO2 nanocomposite were significantly higher than virgin starch and virgin starch/TiO2 films. According to obtain results and bibliography a schema was developed to describe the mechanism of photo-production and photo-degradation of starch/TiO2 by UV-A ray. It can be concluded, the modification of starch based biopolymer by UV-A and nano-TiO2, is an easy and accessible process to improve the packaging properties and photo-degradability of biopolymer based films. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available