کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1646881 1517316 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of cellulose nanowhiskers extracted from industrial bio-residue and commercial microcrystalline cellulose
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Comparison of cellulose nanowhiskers extracted from industrial bio-residue and commercial microcrystalline cellulose
چکیده انگلیسی

The aim of this work was to compare the physical and chemical properties of cellulose nanowhiskers extracted from industrial bio-residue (CNW-BR) by homogenization, and microcrystalline cellulose (CNW-MCC) by acid hydrolysis. CNW-MCC showed a higher surface charge than CNW-BR when analyzed using conductometric titration. Both CNW-suspensions showed flow birefringence, indicating the presence of individualized whiskers. Morphology study confirmed that the whisker diameters were less than 10 nm for both materials, and atomic force microscope images showed somewhat more aggregated BR nanowhiskers. UV/Vis spectroscopy of the CNW-films showed transparency in visual light. The relative crystallinity obtained from X-ray diffraction was 77% for the CNW-BR, and 85% for the CNW-MCC. It was demonstrated, by thermal analysis, that the CNW-BR was more thermally stable than the CNW-MCC, having a higher degradation onset temperature (218 °C and 155 °C) as well as maximum degradation temperature.


► We study cellulose whiskers extracted from bioresidue and microcrystalline cellulose.
► We compared the properties of both nanocrystals extracted in different ways.
► Crystals from bioresidue present higher thermal stability and lower crystallinity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 71, 15 March 2012, Pages 28–31
نویسندگان
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