کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5157426 | 1500585 | 2017 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct production of cellulose nanocrystals from old newspapers and recycled newsprint
ترجمه فارسی عنوان
تولید مستقیم نانوبلورهای سلولز از روزنامه های قدیمی و روزنامه چاپ شده
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کلمات کلیدی
نانوکریستالهای سلولز، نوار خبر کاغذ بازیافت شده، عملکرد فرآیند، پیشگیری از قلیایی و سفید کننده، روزنامه های قدیمی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Cellulose nanocrystals (CNC) are high added value products which can be used in many applications. In this research, CNC were directly produced from two recycled papers: old newspapers (ONP) and 100% recycled newsprint (NP). CNC were also obtained from NP by previously isolating the cellulose particles by alkali and bleaching treatments. CNC yield and quality was assessed through lignin and ash determination, X-ray diffraction analysis, atomic force microscopy and thermogravimetric analysis. Not only crystallinities resulted similar (92-95%), but also aspect ratios (L/d) (each in the range of 50-120). However, different CNC purities and hydrolysis and process yields were obtained. Thus, CNC purity decreased from 93 to 77%, hydrolysis yield was reduced from 64 to 58% but process yield strongly improved from 35 to 60% when no pretreatment was used. Therefore, this study proves the viability of the direct production of CNC from recycled papers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 173, 1 October 2017, Pages 489-496
Journal: Carbohydrate Polymers - Volume 173, 1 October 2017, Pages 489-496
نویسندگان
Cristina Campano, Ruben Miranda, Noemi Merayo, Carlos Negro, Angeles Blanco,