ارزیابی ویژگی‌های مکانیکی، ضدمیکروبی و مقاومت به آب فیلم نانوکامپوزیتی پروتئین میوفیبریل-نانوفیبر سلولز در ترکیب با اسانس پونه کوهی

نوع مقاله: مقاله علمی - پژوهشی

نویسندگان

1 دانش آموخته دانشگاه علوم کشاورزی و منابع طبیعی گرگان

2 استاد دانشگاه علوم کشاورزی و منابع طبیعی گرگان

3 استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان

چکیده

در این تحقیق فیلم زیست نانوکامپوزیت پروتئین میوفیبریل-نانوفیبرسلولز (%4/0NFC ) تولید شد و با هدف فعال سازی و کاهش حساسیت آن به آب، غلظت های مختلف (%2 و 5/1) اسانس پونه کوهی در ماتریکس زیست پلیمر شرکت داده شد. در این راستا ویژگی‌های فیزیکی، مکانیکی، نوری و همچنین فعالیت ضد میکروبی فیلم های مختلف بررسی شد. حضور اسانس در ماتریکس زیست پلیمر پایداری مکانیکی فیلم ها را کاهش داد (05/0>p). هرچند با افزودن اسانس نفوذپذیری فیلم های فعال به بخار آب افزایش نشان داد اما این فیلم‌ها حلالیت و تورم پذیری به مراتب کمتری نسبت به فیلم های نانوکامپوزیت ارائه دادند (05/0>p). افزایش زاویه تماس و کاهش رطوبت فیلم های فعال نیز نشان دهنده افزایش خاصیت آبگریزی و مقاومت به آب آن‌ها بود. بررسی خواص میکروبی فیلم های مختلف نیز نشان داد که فیلم های فعال محتوی هر دو غلظت اسانس خواص ضدمیکروبی قابل قبولی در برابر 3 گونه باکتری Escherichia coli ، Staphylococcus aureus و Bacillus subitilis نشان دادند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of mechanical, antimicrobial and water resistance properties of myofibrillar protein-cellulose nanofiber blend nanocomposite incorporated with Oregano essential oil

چکیده [English]

In this study, bionanocomposite of myofibrillar protein-nanofibrillated cellulose (0.4 wt%) developed. In order to improve antimicrobial properties and reduce its sensitivity to water, different concentrations (1/5 and 2%) Oregano essential oil added in the biopolymer matrix. In this regard, physical, mechanical, optical properties and antimicrobial activity of different films were investigated. The presence of essential oils in biopolymer matrix reduced mechanical stability (p<0.05). Although with the addition of oil permeability to water vapor showed increased in activation films, but these films were presented far lower solubility and swelling than nanocomposite film (p<0.05). Increase the contact angle and decrease of moisture content of the active films also represents an increase of hydrophobic properties and resistance to water them. Assessment microbial properties of various films also showed that the active films containing both oil concentration exhibited acceptable antimicrobial properties against three strains of bacteria E.coli, S.aureus and B.subitilis.

کلیدواژه‌ها [English]

  • Myofibrillar protein
  • Film
  • Essential oil
  • Cellulose nanofiber
  • Antimicrobial properties
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