تهیه فیلم نانوکامپوزیت کیتوزان - نانوذرّات اکسید روی - اسانس آویشن و بررسی ویژگی‌های مکانیکی، ساختاری و ضدمیکروبی آن

شباهنگ, زهرا; بهرامی, سپیده; محمدی, بهزاد

تهیه فیلم نانوکامپوزیت کیتوزان - نانوذرّات اکسید روی - اسانس آویشن و بررسی ویژگی‌های مکانیکی، ساختاری و ضدمیکروبی آن

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دانشجوی دکتری، گروه آموزشی صنایع غذایی، دانشکده کشاورزی، واحد صفا دشت، دانشگاه آزاد اسلامی، صفا دشت، ایران.

² استادیار، دکتری تخصصی، گروه آموزشی صنایع غذایی، دانشکده کشاورزی، واحد صفا دشت، دانشگاه آزاداسلامی، صفا دشت، ایران

³ دانش آموخته کارشناسی ارشد- گروه علوم و صنایع غذایی- دانشکده کشاورزی- مؤسسه آموزش عالی آفاق

چکیده

بسته‌بندی‌های زیست‌تخریب‌پذیر به دلیل ویژگی‌های دوستدار محیط ‌زیست بودن جایگزین مناسبی برای فیلم‌های سنتزی در صنعت بسته‌بندی می‌باشند. در این پژوهش از نانو ذرّات اکسید روی و اسانس آویشن برای بهبود خصوصیات ساختاری کیتوزان استفاده شد که بدین منظور نانو کامپوزیت کیتوزان- نانو اکسید روی (03/0 -01/0٪) – اسانس آویشن(25/0- 5/0٪) تولید شد. تفاوت نمونه ها با فیلم شاهد با هدف تولید بسته‌بندی ضد باکتری و زیست‌تخریب‌پذیر است، خصوصیات ساختاری با استفاده از روش های طیف‌سنجی مادون‌قرمز، پراش اشعه ایکس، بررسی گردیدند و مورفولوژی ذرّات سنتز شده با استفاده از روش میکروسکوپ الکترونی روبشی تعیین شد. نتایج به‌دست‌آمده از بررسی خصوصیات ساختاری نشان داد نانو ذرّات اکسید روی سنتز شده در ماتریکس پلیمری کیتوزان در ابعاد نانومتری می‌باشند. بر اساس نتایج به دست آمده با افزایش غلظت نانواکسید روی و اسانس آویشن، حلالیت آبی و نفوذپذیری به بخارآب فیلم‌ها 70٪ کاهش یافت. برهم‌کنش بین کیتوزان، نانواکسید روی و اسانس آویشن توسط الگوی طیف‌سنجی مادون‌قرمز و پراش اشعه ایکس تأیید شد. یافته های این پژوهش عاملی مهم برای گسترش استفاده از فیلم های زیست تخریب با بهبود خصوصیات عملکردی آنها توسط نانوذرّات می باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Preparation of Chitosan- Zinc Oxide- Thyme Essential Oil Nanocomposite Film, Study on Mechanical, Structural and Antimicrobial Properties

نویسندگان [English]

Zahra Shabahang ¹
sepideh bahrami ²
Behzad Mohammadi ³

¹ Department of Conservation Food Science and Technology, Safadasht Branch, Islamic Azad University, Safadasht, Iran

² Department of Conservation Food Science and Technology, Islamic Azad University, Safadasht, Iran

³ Graduate master, Department of Food Science and Technology, Faculty of Agriculture, Institute of higher education Afagh

چکیده [English]

Biodegradable packaging is a good alternative to synthetic film in the packaging industry because of its environmental-friendly. In this study, zinc oxide nanoparticles and thyme oil were used to enhance the structural properties of chitosan, which were produced for the purpose of chitosan - zinc oxide (0.01- 0.03%) - thyme essential oil (0.25- 0.5%) nanocomposite. The differences between the synthesized samples with control film (blank) are for production of antibacterial and biodegradable packaging, the structural properties were investigated by infrared spectroscopy and X-ray diffraction, also the morphology of the synthesized particles was investigated by scanning electron microscopy. The results of the structural properties showed that the zinc oxide synthesized in the chitosan polymer matrix were nanoparticles. Based on the results, the water solubility and water vapor permeability of films decreased by 70% with increasing zinc oxide concentration and thyme essential oil. The interaction between chitosan, zinc oxide nanoparticles and thyme essential oil was confirmed by infrared spectroscopy and X-ray diffraction pattern. The findings of this study are an important factor for expanding the use of biodegradation films by improving their functional properties by nanoparticles.

کلیدواژه‌ها [English]

Chitosan
Zinc Oxide Nanoparticles
Thyme Essential Oil
Biodegradability
Antibacterial

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