Investigation of the effect of using titanium dioxide polymer nanocompounds on the packaging characteristics of polyethylene terephthalate beverage containers
Subject Areas :Majid Khani 1 , Mehdi Pordel 2 , Abolghasem Davoodnia 3 , Afshin Tavasoli Farsheh 4
1 - PhD Student of Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
2 - Department of chemistry,Mashhad Branch , Islamic Azad University,Mashhad,Iran
3 - Department of Chemistry, Faculty of Sciences, Islamic Azad University, Mashhad Branch, Mashhad.
4 - Department of Agriculture, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Keywords: Polymer nanocompound, Titanium oxide nanoparticles, Preform, Spectrophotometry,
Abstract :
: In this research, polymer nanocompound was prepared with titanium oxide nanoparticles by melt blending procedure. 32 g weight pure preforms and containing titanium oxide nanoparticles were produced in 3 colors. The prepared preforms turned into bottles and the produced bottles were filled with blueberry beverage. The bottles were exposed to sunlight for 3 months and the effect of using nanocompounds on packaging properties was investigated. The results showed that after 15 days of exposure to sunlight, the blueberry drink in the bottles without titanium oxide nanoparticles, became completely colorless. This color change occurred in all transparent, blue and brown bottles, while in the samples containing 1% titanium oxide nanoparticles, color change did not happen and the color of blueberry drink remained blue. The SEM images showed that good distribution of titanium oxide nanoparticles in the bottles containing 1% nanoparticles was happened. The results of spectrophotometry showed good performance of nanoparticles in absorbing UV ray. The FTIR spectra of the pure bottles and the bottles containing titanium oxide nanoparticles in different colors showed that the interaction between titanium oxide nanoparticles and PET compounds in all samples was physically and there was no specific chemical interaction that led to creation or removal of the functional groups. Measuring of dissolved carbon dioxide gas in the bottles showed that the amount of gas reduction in bottles containing nanoparticles is lower than the control samples
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