مطالعه تأثیر نانوذرات اکسید روی و نانوالیاف سلولز بر روی خصوصیات مورفولوژیکی، ساختاری، حرارتی، مکانیکی و بازدارندگی فیلم نانوکامپوزیت برپایه موسیلاژ دانه بارهنگ (Plantago major L.)

نویسندگان
لیلا شیرازی 1
هادی الماسی 2
1 گروه علوم و صنایع غذایی، دانشگاه آفاق، ارومیه
2 گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه ارومیه، ایران
10.22034/FSCT.19.134.31
چکیده
هدف از این پژوهش تولید فیلم نانوکامپوزیت برپایه موسیلاژ دانه بارهنگ بود. نانوذرات اکسید روی ZnO و نانوفیبر سلولز CNF هرکدام در دو غلظت 4 و 8 درصد به منظور تقویت خصوصیات مورفولوژیکی و ساختاری، حرارتی، بازدارندگی به بخار آب و خواص مکانیکی فیلم ها استفاده شد. براساس نتایج FTIR برقراری پیوندهای شیمیایی جدید بین نانوذرات و پلی ساکارید موسیلاژ تایید شد. آزمون XRD نشان داد که ZnO بیشتر از CNF ساختار نیمه بلورین فیلم بارهنگ را تحت تأثیر قرار می دهد. بررسی مورفولوژی فیلم با SEM سطح صاف فیلم شاهد را نشان داد اما با افزودن نانوذرات، زبری و ناهمگونی سطح بیشتر شد. آزمون TGA تقویت مقاومت حرارتی در اثر افزودن نانوذرات را اثبات کرد. اما تاثیر CNF در تقویت خصوصیات حرارتی بیشتر از ZnO بود. افزودن نانوذرات در غلظت 4 درصد تأثیری بر روی ضخامت فیلم ها نداشت اما با افزایش غلظت ضخامت بیشتر شد. محتوای رطوبت و میزان جذب رطوبت فیلم ها با افزودن نانوتقویت کننده ها کاهش یافت. نفوذپذیری به بخار آب فیلم به غلظت نانومواد وابسته بود و در غلظت 4 درصد کاهش معنی داری داشت اما در غلظت 8 درصد به دلیل توده شدن و ماهیت آبدوست نانومواد مجددا بیشتر شد. زاویه تماس سطح فیلم ها با آب در اثر افزودن zNo بیشتر شد اما CNF باعث کاهش این زاویه شد. CNF در مقایسه با ZnO عملکرد بهتری روی خصوصیات مکانیکی داشت و بیشترین تأثیر را در افزایش استحکام کششی، مدول الاستیک و درصد ازدیاد طول نشان داد. بطور کلی نتایج این تحقیق نشان داد که فیلم نانوکامپوزیت موسیلاژ دانه بارهنگ حاوی نانوتقویت کننده های آلی و معدنی از خواص فیزیکوشیمیایی مطلوبی برخوردار بوده و میتواند به عنوان یک گزینه مناسب در بسته بندی مواد غذایی بکار رود.
کلیدواژه‌ها
فیلم نانوکامپوزیت
نانوتقویت کننده
بازدارندگی به بخار آب
استحکام مکانیکی
مورفولوژی
موسیلاژ دانه بارهنگ

موضوعات

عنوان مقاله English

Studying the effect of zinc oxide nanoparticles and cellulose nanofiber on the morphological, structural, thermal, mechanical and barrier properties of nanocomposite film based on Barhang (Plantago major L) mucilage

نویسندگان English

Leila Shirazi 1
Hadi Almasi 2
1 Food science and technology, Afagh University, Urmia, Iran
2 Department of food science and technology, Faculty of agriculture, Urmia University, Iran
چکیده English

The aim of this research was to prepare a nanocomposite film based on Barhang (Plantago major L) seed gum. Zinc oxide (ZnO) and cellulose nanofiber (CNF) nanoparticles at the concentrations of 4 and 8% w/w were incorporated for improving the morphological, structural, thermal, water vapor permeability and mechanical properties of films. The FT-IR results confirmed the occurring of new interactions between nanoparticles and mucilage polysaccharides. XRD results indicated that the effect of ZnO on semi-crystalline structure of Barhang film is higher than the effect of CNF. The neat film has a smoth surface, but the roughness increased by addition of nanoparticles. According to TGA results, the thermal stability of films was affected by incorporation of nanoparticles, but the effect of CNF on improving the thermal stability of film was more than ZnO. The addition of nanoparticles at the concentration of 4% had no effect on the thickness of films but by increasing to 8%, the thickness increased. Moisture content and moisture absorption of films was also decreased significantly by incorporation of nanoparticles. The water vapor permeability of films was dependent on the concentration of nanoparticles and at 4%, it decreased significantly but at 8% concentration, the permeability increased again due to the aggregation of nanoparticles and their hydrophilic nature. The water contact angle of films’ surface increased by addition of ZnO but the CNF caused to decrease this value due to its hydrophilicity. The effect of CNF on improving the mechanical properties of films was better than ZnO. The CNF had the most effect on increasing tensile strength, elastic modulus and elongation to break. In general, this research indicated that by using organic and inorganic nanoreinforcements, the improving of the properties of Barhang seed gum based films is possible and the effect of CNF is more than ZnO.

کلیدواژه‌ها English

Nanocomposite film
Nanoreinforcement
Water vapor permeability
Mechanical strength
morphology
Barhang seed mucilage
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