بسته بندی فعال و افزایش ماندگاری روغن زیتون بکر با استفاده از فیلم زیست تخریب پذیر بر پایه پلی وینیل الکل اصلاح شده با نانوذرات کلرید نقره و اسپیرولینا

نویسندگان
عارف عرفانی 1
میر خلیل پیروزی فرد 1
سجاد پیرسا 2
1 گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه ارومیه، ارومیه، ایران
2 دانشگاه ارومیه- دانشکده کشاورزی
10.22034/FSCT.19.132.265
چکیده
در این مطالعه فیلم زیست تخریب پذیر از پلی وینیل الکل تهیه گردید. از نانوذرات کلرید نقره و پودر جلبک اسپیرولینا برای اصلاح ساختار فیزیکوشیمیایی و ایجاد خواص آنتی اکسیدانی و فوتوکاتالیتیکی در فیلم استفاده شد. مورفولوژی سطحی فیلم مورد بررسی قرار گرفت. فیلم پلی وینیل الکل و کامپوزیت­های آن برای بسته­بندی روغن زیتون بکر استفاده شد. از طرح آماری دی-اوپتیمال برای بررسی تاثیر نوع بسته­بندی و زمان نگه­داری بر روی ویژگی­های شیمیایی، رنگی و حسی روغن استفاده شد. ویژگی­های شیمیایی (اسیدیته، عدد پرکسید، ضریب شکست و فنل کل)، ویژگی­های حسی و رنگی مورد بررسی قرار گرفت. از روش سطح پاسخ برای بررسی تاثیر متغیرهای مستقل بر روی روغن و نیز مدل­های ریاضی ایجاد شده استفاده شد. نتایج بدست آمده نشان داد، در فیلم پلی وینیل الکل اصلاح شده با ذرات کلرید نقره و پلی وینیل الکل اصلاح شده با ذرات کلرید نقره و اسپیرولینا، وجود این ذرات در سطح فیلم کاملا مشهود بود. نتایج آنالیز شیمیایی، حسی و رنگی روغن نشان داد با افزایش زمان نگه داری روغن در همه بسته­بندی­ها، کیفیت شیمیایی، حسی و رنگی روغن کاهش پیدا کرد. عددپراکسید به عنوان مهمترین شاخص کیفیت روغن­ها در بسته­بندی معمولی در طول 30 روز نگه­داری از 1 تا 7 (mEq O2/Kg oil) افزایش یافت در حالیکه در روغن بسته­بندی شده با پلی وینیل الکل اصلاح­شده با کلرید نقره و جلبک اسپیرولینا این افزایش از 1 تا 2 (mEq O2/Kg oil) بوده است. در حالت کلی روغن­های بسته­بندی شده با پلی وینیل الکل اصلاح شده با کلرید نقره و جلبک اسپیرولینا کمترین تغییرات کیفی را نسبت به بسته­بندی معمولی نشان دادند که نشان دهنده قابلیت این فیلم ها در کنترل کیفیت و افزایش ماندگاری روغن زیتون بکر می باشد.

کلیدواژه‌ها
روغن زیتون
بسته بندی فعال
فیلم آنتی اکسیدان
نانوکامپوزیت

موضوعات

عنوان مقاله English

Active packaging and increasing shelf life of virgin olive oil using biodegradable film based on polyvinyl alcohol modified with silver chloride nanoparticles and spirulina

نویسندگان English

Aref Erfani 1
Mir Khalil Pirouzifard 1
sajad pirsa 2
1 Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
2 Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
چکیده English

In this study, biodegradable film was prepared from polyvinyl alcohol. Silver chloride nanoparticles and spirulina algae powder were used to modify the physicochemical structure and create antioxidant activity in the film. The surface morphology of the film was investigated. Polyvinyl alcohol film and its composites were used for packaging virgin olive oil. D-optimal design was used to investigate the effect of packaging type and storage time on the chemical, color and sensory characteristics of the oil. Chemical characteristics (acidity, peroxide value, refractive index and total phenol), sensory and color characteristics were investigated. The response surface method was used to investigate the effect of independent variables on the oil as well as the created mathematical models. The obtained results showed that in polyvinyl alcohol film modified with silver chloride particles and polyvinyl alcohol modified with silver chloride and spirulina particles, the presence of these particles on the surface of the film was completely evident. The results of the chemical, sensory and color analysis of the oil showed that the chemical, sensory and color quality of the oil decreased with the increase in the storage time of the oil in all packages. Peroxide value as the most important indicator of the quality of oils in normal packaging increased from 1 to 7 (mEq O2/Kg oil) during 30 days of storage, while in oil packaged with polyvinyl alcohol modified with silver chloride and spirulina algae, this increase was from 1 to 2 (mEq O2/Kg oil). In general, oils packaged with polyvinyl alcohol modified with silver chloride and spirulina algae showed the least quality changes compared to normal packaging, which indicates the ability of these films to control the quality and increase the shelf life of virgin olive oil.

کلیدواژه‌ها English

Olive Oil
Active packaging
Antioxidant film
Nanocomposite
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