تهیه بیوپلیمر بر پایه آگار استخراج شده از جلبک قرمز Acanthophora خلیج فارس و ارزیابی خواص آن

نوع مقاله : مقاله پژوهشی

نویسندگان

• پریسا دیانت ¹
• مهدی حاجی عبدالرسولی ²
• مرتضی یوسف زادی ³

¹ گروه زیست شناسی دریا،دانشگاه علوم و فنون دریا، دانشگاه هرمزگان، بندرعباس، ایران

² گروه مهندسی شیمی،دانشکده مهندسی شیمی و نفت، دانشگاه هرمزگان، بندرعباس، ایران

³ گروه زیست شناسی،دانشکده علوم پایه، دانشگاه قم،قم،ایران

https://doi.org/10.22067/ifstrj.2023.78025.1196

چکیده

در میان پلیمرهای زیستی مختلف مورد استفاده برای تهیه فیلم‌، پلی‌ساکاریدها به دلیل فراوانی و غیر سمی بودن به عنوان اجزای اصلی فیلم به‌شمار می‌آیند. مخلوط آگار با سایر پلیمرها مانند PVA، خواص مکانیکی و زیست تخریب‌پذیری کامپوزیت‌های زیستی بهبود می‌بخشد. هدف اصلی این پژوهش ساخت بیوپلیمر به منظور کاربرد در صنایع بسته‌بندی با آگار استخراج شده از ماکروجلبک Acanthophora در ترکیب با پلیمر صنعتی پلی‌ونیل‌الکل و گلیسرول است. برای ساخت بیوپلیمر آگار، در ابتدا بهینه‌سازی استخراج پلیمر آگار از ماکروجلبک با روش سدیم هیدروکسید/ گرمادهی انجام ودر مرحله بعد سنجش ترکیبات محلول آگار استخراجی صورت گرفت. سپس برای ساخت کامپوزیت زیستی با روش قالب‌گیری از گلیسرول (30 درصد وزنی-وزنی) و پلیمر PVA (25 درصد وزنی-وزنی) استفاده شد. نتایج نشان داد که بازده استخراج برای روش پیش‌تیمار سدیم هیدروکسید/گرمادهی 15 درصد است. آزمون سنجش میزان کل ترکیبات فنلی محلول آگار استخراج شده نشان داد که میزان ترکیبات فنولی محلول آگار 004/0 ± 077/0 بر حسب میلی‌گرم اسید گالیک/ گرم آگار و میزان پروتئین محلول آگار استخراج شده، حاوی 019/0 ± 040/0 پروتئین بر حسب میلی‌گرم/میلی‌لیتر آگار است. نتایج آزمون کشش بیانگر این بود که افزودن گلیسرول به آگار باعث افزایش انعطاف‌پذیری و افزودن پلیمر PVA باعث افزایش در میزان استحکام کششی و بهبود خواص فیزیکی نظیر افزایش درجه تورم، کاهش درصد حلالیت در آب فیلم‌های زیستی برپایه آگار می‌شود. در نهایت نتایج، استفاده از این پوشش‌ها جهت بسته‌بندی میوه و سبزیجات در مناطق گرمسیری با افزایش طول عمر مفید آن‌ها به مدت حداقل تا 5 روز در دمای 25 درجه سانتی‌گراد تایید می‌کند.

کلیدواژه‌ها

• بسته‌بندی
• بیوپلیمر
• پلاستیک زیستی
• پلی‌ساکارید
• PVA

موضوعات

• فناوری مواد غذایی

©2023 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.

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