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Development and characterization of biodegradable nanocomposite films incorporating natural antimicrobial agents for dairy product Ainur | ||
| Caspian Journal of Environmental Sciences | ||
| دوره 24، شماره 3، مهر 2026، صفحه 729-736 اصل مقاله (786.63 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22124/cjes.2026.9786 | ||
| نویسندگان | ||
| Ainur Zheldybayeva1؛ Zhuldyz Yembergenova2؛ Sholpan Amanova* 3؛ Ayaulym Suyundikova1؛ Roza Sarmanova* 4؛ Muratkali Aliya2؛ Gulmira Kassenova5؛ Georgiy Afonin6 | ||
| 1Department of Applied Biotechnology, Almaty Technological University, Almaty, Kazakhstan | ||
| 2Department of Chemistry and Food Technology, K.Zhubanov Aktobe regional university, Aktobe, Kazakhstan | ||
| 3Department of Food Safety and Quality, Almaty Technological University, Almaty, Kazakhstan | ||
| 4Department "Biology, Plant Protection and Quarantine" of Saken Seifullin Kazakh Agrotechnical Research University, Kazakhstan | ||
| 5Head of the Biotechnology Laboratory at the Research Institute of Biotechnology and Ecology, Zhetysu University named after I.Zhansugurov, Taldykorgan, Kazakhstan | ||
| 6Department of Oncology Asfendiyarov Kazakh National Medical University, Almaty, Kazakhstan | ||
| چکیده | ||
| Currently, the environmental issues arising due to pollution with plastic packaging waste in the food industry have turned into a critical problem for developing countries like Kazakhstan. The objective of this study was to create and test the properties of nanocomposite biodegradable films consisting of polylactic acid and starch, loaded with montmorillonite nanoclay and thyme essential oil as a part of the development of dairy packaging films. Films were produced using solvent casting technique at various concentrations of nanoclay (1, 3, and 5 wt%) and thyme essential oil (2 wt%), and tested for their mechanical, barrier, structural, antimicrobial, and practical properties. It has been found that films with 5 wt% of nanoclay demonstrated increased tensile strength by 70% (18.4 to 31.2 MPa) and decreased water vapor permeability by 50% (42.8 to 18.4 g m-2 day-1). SEM and XRD analyses demonstrated the appropriate distribution of nanoparticles and increased interlayer distance from 1.52 to 1.82 nm. Films with thyme essential oil possessed good antimicrobial effect against Staphylococcus aureus (halo diameter 19.2 mm) and Escherichia coli (15.6 mm). According to the experiment conducted in refrigerated conditions of milk package testing, the improved film (NC3-TO) decreased the total amount of microorganisms to 68.5 log CFU mL-1 on the 21st day of storage while 56.8 log CFU mL-1 were obtained using traditional polyethylene packages (p < 0.001). Thus, the shelf life increased by seven days. Nanocomposite films designed during this research might be a good replacement for conventional plastics in the Kazakhstan dairy market. | ||
| کلیدواژهها | ||
| Biodegradable nanocomposite؛ Dairy packaging؛ Thyme essential oil؛ Polylactic acid | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 5 تعداد دریافت فایل اصل مقاله: 5 |
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