تولید و ارزیابی فیلم نانوکامپوزیتی کیتوزان-‌مونت‌موریلونیت حاوی اسانس مرزه (Satureja hortensis)

نوع مقاله : مقاله پژوهشی لاتین

نویسندگان

• وحید علیزاده
• حسن برزگر
• بهزاد ناصحی
• وحید سماواتی

گروه علوم و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان، خوزستان، ایران.

https://doi.org/10.22067/ifstrj.v1396i13.64248

چکیده

در تحقیق حاضر، خصوصیات فیزیکوشیمیایی و ضدمیکروبی فیلم‌های فعال نانوکامپوزیتی کیتوزان-نانورس حاوی مقادیر مختلف اسانس مرزه (5/0، 1 و 2 درصد حجمی/حجمی) موردارزیابی قرار گرفت. با افزودن اسانس به فیلم‌ها، مقاومت به کشش، کاهش و کشش‌پذیری فیلم‌ها، به‌طور معنی‌داری افزایش پیدا کرد. نتایج نشان داد که از بین نمونه‌های فیلم موردآزمون، فیلم شاهد دارای کمترین میزان نفوذپذیری نسبت به عبور بخار آب بود. همچنین با افزایش غلظت اسانس، حلالیت در آب و شفافیت فیلم‌ها کاهش یافت. نتایج آزمون گرما وزن‌سنجی (TGA) نشان داد که فیلم‌های حاوی اسانس مرزه نسبت به فیلم شاهد دارای دمای تخریب بالاتری هستند. در ادامه خصوصیات ساختاری و مورفولوژیکی فیلم‌های نانوکامپوزیتی، به‌وسیله روش پراش پرتو ایکس (XRD) و میکروسکوپ الکترونی روبشی (SEM) موردبررسی قرار گرفت. فیلم‌های حاوی اسانس مرزه، روی باکتری‌های گرم مثبت ( Bacillus cereus و  Staphylococcus aureus) نسبت به باکتری‌های گرم منفی (Escherichia coli و Salmonella typhimurium) تأثیر بازدارندگی بیشتری داشتند. درنهایت نتایج نشان داد که اسانس مرزه می‌تواند به‌عنوان یک ماده ضدباکتری طبیعی در ساخت فیلم‌های زیست‌تخریب‌پذیر ضدمیکروب مورداستفاده قرار گیرد.

کلیدواژه‌ها

• فیلم نانوکامپوزیتی
• کیتوزان
• مرزه
• روغن اساسی
• ضدمیکروب

عنوان مقاله [English]

Development of a chitosan-montmorillonite nanocomposite film containing Satureja hortensis essential oil

نویسندگان [English]

• Vahid Alizadeh
• Hassan Barzegar
• Behzad Nasehi
• Vahid Samavati

Department of Food Science and Technology, Ramin Agriculture and Natural Resources University of Khuzestan, Iran.

چکیده [English]

The present work describes the physicochemical and antimicrobial properties of active films developed by incorporating different concentrations (0.5, 1, and 2% v/v) of Satureja hortensis essential oil (SEO) and 3% (w/w) nanoclay into a chitosan- montmorillonite nanocomposite film. The tensile strength (TS) of the films significantly decreased and elongation at break (EAB) increased with the incorporation of SEO. The control film exhibited the lowest water vapor permeability. In addition, decreases in water solubility (WS) and transparency were observed with increasing the concentration of SEO. Thermogravimetric analysis (TGA) indicated that films incorporated with SEO exhibited a higher degradation temperature compared with the control. The structural properties and morphology of the nanocomposite films were examined by X-ray diffractometry (XRD) and Scanning electron microscopy (SEM). SEO-incorporated films were more effective against gram positive bacteria (Staphylococcus aureus and Bacillus cereus) than gram negative ones (Salmonella typhimurium and Escherichia coli). The results suggested that SEO, as a natural antibacterial agent, has the potential to be applied in antimicrobial biodegradable films.

کلیدواژه‌ها [English]

• Nanocomposite film
• Chitosan
• Satureja hortensis
• Essential oil
• Antimicrobial

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