خواص فیزیکی و مکانیکی فیلم زیست‌تخریب‌پذیر خوراکی حاصل از ثعلب

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد گروه علوم و مهندسی صنایع غذایی، دانشکدۀ مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

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

چکیده

در این مطالعه امکان‌سنجی استفاده از ثعلب به‌عنوان مادۀ جدید تشکیل‌دهندۀ فیلم بررسی شد. خواص مکانیکی، نفوذپذیری به بخار آب و ضخامت فیلم‌های ثعلب حاوی گلیسرول تعیین شدند. با افزایش مقدار مادۀ خشک ثعلب از (w/v)1 درصد به (w/v)3 درصد مقادیر مقاومت کششی و درصد افزایش طول به‌ترتیب از 16/16 درصد و 85/18 مگاپاسکال به 15/70 درصد و 5/24 مگاپاسکال افزایش یافت. همچنین مقادیر نفوذپذیری به بخار آب کاهش و سپس افزایش یافت. سطح و پشت فیلم‌های خوراکی ثعلب با میکروسکوپ الکترونی روبشی برای توضیح خواص ساختاری مطالعه شد. این مطالعه نشان داد که ثعلب پتانسیل خوبی برای استفاده در فیلم‌های خوراکی با ویژگی‌های جالب دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Physical and mechanical properties of biodegradable edible film obtained from Salep

نویسندگان [English]

  • Mohammad Ekrami 1
  • Zahra Emam jomeh 2
  • Marzieh Mirzakhani 1
چکیده [English]

In this study the feasibility of using salep as a new film-forming material was studied. The mechanical properties, water vapor permeability and thickness of salep films incorporated with glycerol were determined. Increasing the content of dry material of salep from 1% to 3%(w/v) increased values for tensile strength and elongation at break from 16.16% and 18.85 MPa to 70.15% and 24.50 MPa respectively. Also values for water vapor permeability, decreased and then increased. Surface and dorsal of Salep edible films studied by Scanning Electron Microscopy to explain structure properties. This study revealed that the salep had a good potential to be used in producing edible films with interesting specifications.

کلیدواژه‌ها [English]

  • Salep
  • Edible film
  • Mechanical properties
  • water vapor permeability
  • Scanning Electron Microscopy
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