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- Title
Antibacterial biodegradable films for foods.
- Authors
Chorna, Anastasiya; Shulga, Oksana; Arsenieva, Larisa; Hrehirchak, Nataliya; Zusko, Kateryna; Riabov, Serhii; Kobylinskyi, Serhii; Goncharenko, Ludmila
- Abstract
Introduction. Titanium dioxide (TiO2) has antibacterial properties, but It has not been used for antibacterial films. It becomes necessary to study the direction of its antibacterial properties in packing as well as the influence of its packaging on the quality of food. Materials and methods. Films based on polyvinyl alcohol (PVA) with various concentration of TiO2 were studied. Elongation, tensile strength, glass transition and melting temperature of the films from polymer materials were defined. Microbiological studies to establish inhibitory action of nanodispersed TiO2 powder on some pathogens were carried out. Antibacterial properties of TiO2 films were studied by agar diffusion test. Results and discussion. Addition of TiO2 nanodispersed powder to the film decreases its flexibility by 20-45%, depending on the added amount, however improves its tensile strength. Moreover, adding of TiO2 powder by more than 1% increases the tensile strength of plastic film (46,7 MPa). The melting point (transition temperature to the viscous flow state) (175 °C) and a glass transition temperature (78 °C) were the best for the sample of 1% filler. The least deformation was observed for the same sample, indicating that most interacted system is associated with the maximum number of hydrogen bonds. The best approach was to handle TiO2 with a UV radiation, since this way the minimum concentration (2,5%) of TiO2 suspension was used. While not conducting UV treatment, it was necessary to use 10 - 20% of TiO2 mixture. TiO2 solutions do not suppress the action of fungi and yeast. TiO2 deposited on the film inhibits the growth of bacteria (E. coli IEM-1, B. subtilis BT-2), growth retardation was observed. Conclusions. Introduction of biodegradable packaging with antibacterial properties is necessary and requires designing or revising the existing regulatory documents. Low prices of proposed nanoparticle additives do not significantly affect the cost of packaging, which is extremely important in the difficult economic conditions.
- Subjects
FOOD; BIODEGRADABLE products
- Publication
Ukrainian Food Journal, 2016, Vol 5, Issue 1, p88
- ISSN
2304-974X
- Publication type
Article