ساخت و بررسی خواص آئروژل لیگنوسلولزی از کلش ساقة برنج

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

2 دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

3 استاد- دانشکده منابع طبیعی کرج- دانشگاه تهران

چکیده

DOR:98.1000/1735-0913.1398.34.124.66.1.9.1580
در این تحقیق از پسماندهای کلش ساقة برنج به‌عنوان مادة لیگنوسلولزی تجدیدپذیر برای تولید آئروژل لیگنوسلولزی نانو ساختار استفاده شد. بدین منظور، ابتدا پودر کلش برنج در محلول قلیایی آب – هیدروکسید سدیم تیمار شد و مخلوط حاصل با توالی انجماد – ذوب، تبادل حلال و در آخر با خشک‌کن انجمادی به آئروژل لیگنوسلولزی تبدیل شد. خواص محصول حاصل شامل دانسیته و میزان تخلخل کل تعیین شد و سایر خواص فیزیکی و شیمیایی با روش‌های آنالیز شامل SEM، FTIR، XRD، جذب نیتروژن (BET) و DSC ارزیابی شد. نتایج نشان داد که تیمار قلیایی سبب انحلال و خروج بخش زیادی از مواد ساختاری کلش برنج در جریان ساخت آئروژل می‌شود که نتیجة آن تولید محصولی با چگالی کم، تخلخل پیوسته، سطح ویژة زیاد و اندازة حفره‌های نانومتری است. آئروژل حاصل دارای زمینه‌ای متشکل از ذرات و الیاف به‌هم‌پیوسته با ابعادی در مقیاس نانومتر بود که تفاوت زیادی از نظر شیمیایی و فیزیکی با کلش ساقة برنج اولیه داشت.

کلیدواژه‌ها

موضوعات


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