Document Type : Original Article
- Soheil Kianirad 1
- Zahra Beagom Mokhtari-Hosseini 1
- Ashrafalsadat Hatamian-Zaremi 2
- Moein Sarsangi 1
- Sajad Afshar-Yegane 1
- Rasool Setareyi 1
- Ayat Azizi-Alavijeh 1
- Mozhdeh Haddadi 3
1 Department of Chemical Engineering, Faculty of Petroleum & Petrochemical Engineering, Hakim Sabzevari University, Sabzevar, Iran
2 Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
3 Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
Background: Demand for degradable and biocompatible polymers is rapidly increasing, especially in the food packaging sector where it is highly encouraged by environmental management policies.
Methods: This study aimed to prepare zein/Montmorillonite (MMT) and zein/poly(vinyl alcohol) composite films by a high power ultrasonic probe method for use as a food coating. The film was produced through solvent casting method. In all the films, glycerol and Polyethylene glycol were used to improve the fragility properties. The biodegradability, color characteristics and surface roughness of the films were evaluated.
Results: Based on the results of the statistical analysis, the clay dispersion method a, Montmorillonite (MMT) and poly (vinyl alcohol) content significantly affected the mechanical and properties of the composite films. The results showed that mechanical properties of the nanocomposites were improved in the presence of small amounts (up to 3%) of MMT, while increased montmorillonite percentage in the micro composite films weakened the mechanical properties of these films. It was also found that the addition of montmorillonite and poly (vinyl alcohol) increased the porosity of the film. Therefore, the use of high power sonication is a suitable method for producing protein-based nanocomposites with an exfoliated structure.
Conclusions: as the nanocomposite films of zein, zein-polyvinyl alcohol and zein-montmorillonite are highly biodegradable, ntural and non-toxic, they are highly efficient in this field and can be used in food packaging.
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