تهیه فیلم‌های امولسیونی ژلاتین به روش پیکرینگ امولسیون‌ حاوی نانوذرات کیتین

نویسندگان
سحر یوسفی هزاری 1
جعفر محمدزاده میلانی 2
علی معتمدزادگان 2
ثمر صحرایی 3
1 دانشجوی کارشناسی ارشد گروه علوم ومهندسی صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی ساری
2 استاد گروه علوم و مهندسی صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی ساری
3 دانشجوی پسادکتری گروه علوم و مهندسی صنایع غذایی دانشگاه تبریز
10.52547/fsct.18.120.24
چکیده
هدف از این تحقیق تولید و بررسی فیلم امولسیونی از ژلاتین به روش پیکرینگ امولسیون حاوی نانوذرات کیتین می‌باشد. غلظت‌های مختلف نانوکیتین (2/0، 5/0، 1و 2 گرم در گرم ژلاتین خشک) و دو غلظت متفاوت روغن ذرت (20% و 30% بر پایه وزن ماده خشک) برای تهیه فیلم امولسیونی ژلاتینی به روش پیکرینگ امولسیون استفاده شد. سپس خصوصیات فیلم‌ها با بررسی پتانسیل زتا، ضخامت، میزان رطوبت و حلالیت، نفوذپذیری به بخار آب، آبگریزی سطحی، خصوصیات مکانیکی و حرارتی مورد بررسی قرار گرفت. نتایج بدست آمده نشان داد که امولسیون ژلاتین حاوی 5/0 گرم‌درگرم نانوذرات کیتین پایداری بیشتری نسبت به سایر نمونه‌ها داشت. فیلم‌های امولسیونی پایدارشده با نانوکیتین میزان رطوبت، حلالیت و نفوذپذیری به بخارآب را نسبت‌به فیلم‌های کنترل و فیلم‌های حاوی تویین کاهش داد و فیلم‌های حاوی نانوکیتین خصوصیات مکانیکی را بهبود بخشیدند. علاوه بر این افزودن نانوکیتین تا 5/0 گرم در گرم به فیلم امولسیونی ژلاتین خصوصیات حرارتی را بهبود بخشید زیرا منجر به افزایش دمای ذوب و آنتالپی شد. همچنین افزودن نانوکیتین خواص آبگریزی فیلم را افزایش داد. غلظت 30% روغن بر روی خواص فیلم اثر بهتری نسبت به 20% روغن داشت. بنابراین استفاده از نانوکیتین به عنوان تثبیت‌کننده امولسیون پیکرینگ در فیلم‌های ژلاتین با غلظت 30% روغن ذرت می‌تواند منجر به ایجاد پلیمرهای زیست تخریب‌پذیر با خصوصیات قابل قبولی برای بسته‌بندی مواد غذایی شود.
کلیدواژه‌ها
پیکرینگ امولسیون
ژلاتین
فیلم خوراکی
نانوکیتین

موضوعات

عنوان مقاله English

Preparation of Gelatin Emulsion Films by Emulsion Pickering Method Containing Chitin Nanoparticles

نویسندگان English

Sahar Yousefi Hezari 1
jafar Mohammadzadeh Milani 2
Ali Motamedzadegan 2
samar sahraee 3
1 Ms.C.Student of Department of Food Science and Technology, Sari Agricultural Sciences and Natural Resources University.
2 Professor, Department of Food Science and Technology, Sari Agricultural Sciences and Natural Resources University.
3 Postdoctoral student, Department of Food Science and Technology, University of Tabriz.
چکیده English

This study aimed to produce and investigate an emulsion film of gelatin by emulsion pickering method containing chitin nanoparticles. Different concentrations of nanochitin (0.2, 0.5, 1, and 2 g/g dry gelatin) and two different concentrations of corn oil (20% and 30% based on dry matter weight) were used to prepare the gelatin emulsion film by the emulsion pickering method. Then the properties of the films were investigated by examining the zeta potential, thickness, moisture and solubility, water vapor permeability (WVP), surface hydrophobicity, mechanical and thermal properties. The results showed that the gelatin emulsion containing 0.5 g/g of chitin nanoparticles was more stable than other samples. Nanochitin-stabilized emulsion films reduced moisture, solubility, and water vapor permeability compared to control films and tween-containing films, and nanochitin-containing films improved mechanical properties. In addition, the addition of nanochitin up to 0.5 g/g to the gelatin emulsion film improved the thermal properties because it led to an increase in melting temperature and enthalpy. The addition of nanochitin also increased the hydrophobic properties of the film. 30% oil concentration had a better effect on film properties than 20% oil. Therefore, the use of nanochitin as a stabilizing emulsion for pickering in gelatin films with a concentration of 30% corn oil can lead to the formation of biodegradable polymers with more acceptable properties for food packaging.

کلیدواژه‌ها English

Pickering emulsion
Gelatin
Edible film
Nanochitin
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