تحقیقات مهندسی صنایع غذایی

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بررسی اثر اسید اولئیک بر ویژگی‌های فیزیکی، مکانیکی و سد کنندگی فیلم خوراکی ثعلب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد گروه علوم و مهندسی صنایع غذایی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

2 استاد گروه علوم و مهندسی صنایع غذایی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

چکیده

فیلم­های جدید خوراکی بر پایه ثعلب(که از گیاه ثعلب،  Orchis mascula به­دست می­آید) و اسید اولئیک با نسبت­های 10، 20 و 30 (درصد وزنی/ وزنی) با استفاده از روش تشکیل امولسیون با هدف بهبود سدکنندگی نسبت به بخار آب و خواص مکانیکی آنها تهیه شدند.  با افزایش غلظت اسید اولئیک تا 30 درصد وزنی درصد فیلم­های تهیه شده از ثعلب، نفوذپذیری به اکسیژن (27درصد)، ازدیاد طول (86 درصد) و ضخامت (2درصد) به طرز معنی­داری (05/0>P) افزایش یافت، درحالی­که استحکام کششی (37 درصد)، انحلال­پذیری (39درصد)، شفافیت (13درصد) و نفوذپذیری به بخار آب (54 درصد) کاهش پیدا کرد.  با افزایش غلظت اسید اولئیک، رنگ فیلم ثعلب کمی به زرد متمایل شد، اگرچه هنوز هم در ظاهر شفاف به­ نظر می­رسید.  با توجه به خواص مطلوب سدکنندگی و ضد رطوبتی فیلم ثعلب، می­توان از آن برای بسته­بندی آن دسته از مواد غذایی که رطوبت کمی دارند و یا میل ترکیبی چندانی به آب ندارند، استفاده کرد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Oleic Acid on Physical, Mechanical and Barrier Properties of Edible Salep Fil

چکیده [English]

New edible composite films formed from salep (Orchis mascula) and 10%, 20%, and 30% (w/w) oleic acid were prepared by emulsification with the aim of improving the water vapor barrier and mechanical properties of the film. As oleic acid concentration increased up to 30% (w/w), oxygen permeability (27%), elongation at break (86%) and thickness (2%) of salep films increased significantly and the tensile strength (37%), solubility (39%), transparency (13%) and water vapor permeability (54%) decreased significantly (P<0.05). Increasing the oleic acid concentration produced a slight yellowish color in the salep film, but it was still transparent in appearance. It was found that oleic acid can be incorporated into the film and might be applicable for food packaging applications that require high water vapor permeability.

کلیدواژه‌ها [English]

  • MECHANICAL PROPERTIES
  • Oleic acid
  • Permeability
  • physical properties
  • Salep
  • Water Vapor Oxygen Permeability
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تحقیقات مهندسی صنایع غذایی
دوره 16، شماره 1 - شماره پیاپی 1
خرداد 1394
صفحه 51-64
فایل ها
هم رسانی
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