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استخراج نانو سلولز کریستالی از تفاله چغندرقند و مشخصه‌سازی آن | ||
| علوم و فناوریهای پدافند نوین | ||
| مقاله 5، دوره 13، شماره 4 - شماره پیاپی 50، اسفند 1401، صفحه 263-270 اصل مقاله (1.25 M) | ||
| نوع مقاله: نانوفناوری | ||
| نویسندگان | ||
| سید میثم فاطمی1؛ سید مرتضی رباط جزی* 2؛ علیرضا زارعی3؛ سید قربان حسینی3 | ||
| 1دانشجوی دکترا، دانشگاه صنعتی مالک اشتر، تهران، ایران | ||
| 2استادیار،دانشگاه صنعتی مالک اشتر، تهران، ایران | ||
| 3استاد، دانشگاه صنعتی مالک اشتر، تهران، ایران | ||
| تاریخ دریافت: 22 دی 1400، تاریخ بازنگری: 23 بهمن 1401، تاریخ پذیرش: 07 اسفند 1401 | ||
| چکیده | ||
| نانو سلولز کریستالی به دلیل خواصی مانند نسبت سطح ویژه زیاد، بلورینگی بالا و خواص مکانیکی و نوری خوب به‌عنوان یک ماده کاربردی شناخته می‌شود. این ماده به‌عنوان یک کلاس مواد جدید برای محصولات نظامی پیشرفته مانند جلیقه‌های ضدگلوله، مواد مقاوم در برابر آتش، پیشرانه‌ها و محصولات الکترونیکی ظهور کرده است. در این تحقیق سلولز با خلوص بالا از تفاله چغندرقند به روش خمیرسازی سودا - آنتراکینون استخراج و برای حذف حداکثر همی سلولز و لیگنین سفیدکاری انجام شد. سپس از سلولز استخراج شده با سولفوریک اسید 64% نانو سلولز کریستالی تولید گردید. نانو سلولز کریستالی حاصل با استفاده از پراش پرتو ایکس (XRD)، میکروسکوپ الکترونی عبوری (TEM)، طیف‌سنجی مادون‌قرمز-تبدیل فوریه (FTIR) و دستگاه وزن سنج حرارتی (TGA) مشخصه‌یابی شد. تجزیه‌وتحلیل میکروسکوپ الکترونی عبوری وجود نانو سلولز کریستالی را تأیید کرد. هیدرولیز با سولفوریک اسید غلیظ باعث افزایش تبلور سلولز گردید و ابعاد آن به را مقیاس نانو کاهش داد. قطر نانو سلولز کریستالی در محدوده کمتر از nm۲۰، طول آن در محدودهnm ۲۰۰-۴۰۰ و راندمان تولیدش ۵۳% گزارش شده که قابل‌مقایسه با نانو سلولز کریستالی حاصل از منابع چوبی و دیگر زیست‌توده‌هاست. این محصول قابلیت بکار بردن در انواع کاربردهای نظامی اعم از کامپوزیت‌های مقاوم و سبک، سطوح دارای خصوصیت ضدخوردگی و پانسمان را دارد. | ||
| کلیدواژه‌ها | ||
| نانو سلولز کریستالی؛ تفاله چغندرقند؛ خمیرسازی سودا - آنتراکینون؛ هیدرولیز اسیدی | ||
| عنوان مقاله [English] | ||
| Extraction of Cellulose Nanocrystal from Sugar Beet Pulp and its Characterization | ||
| نویسندگان [English] | ||
| Seyed Meisam Fatemi1؛ Seyed Morteza Robatjazi2؛ Ali Reza Zarei3؛ Seyed Ghorban Hosseini3 | ||
| 1Department of Chemical Engineering, Malek Ashtar University of Technology, Tehran, Iran | ||
| 2Department of Chemical Engineering, Malek Ashtar University of Technology, Tehran, Iran | ||
| 3Department of Chemistry, Faculty of Chemistry, Malek Ashtar University of Technology, Tehran, Iran | ||
| چکیده [English] | ||
| . Cellulose nanocrystal is a functional material because of its properties like high specific surface ratio, high crystallinity, and good mechanical and optical properties. It has emerged as a new material class for advanced military products such as bulletproof vests, fire-resistant materials, propellants, and electronic products. In this study, high purity cellulose was extracted from sugar beet pulp by soda-anthraquinone pulping method and bleached to remove maximum hemicellulose and lignin. Then cellulose nanocrystal was produced from extracted cellulose with 64% sulfuric acid. The resulting crystalline nanocellulose was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transforms infrared spectroscopy (FTIR), and Thermogravimetric analysis (TGA). Transmission electron microscopy analysis confirmed the presence of cellulose nanocrystal. Hydrolysis with concentrated sulfuric acid increased the crystallization of bleached cellulose and reduced its size to the nanoscale. The diameter of cellulose nanocrystal was less than 20 nm, the length was in the 200-400 nm range, and the production yield was 53%, which is comparable to cellulose nanocrystal from wood and other biomass sources. This product can be used in various military applications, including durable and lightweight composites, surfaces with anti-corrosion properties, and bandages. | ||
| کلیدواژه‌ها [English] | ||
| Crystalline Nanocellulose, Sugar Beet Pulp, Soda-Anthraquinone Pulping, Acid Hydrolysis | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 1,394 تعداد دریافت فایل اصل مقاله: 214 |
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