Cellulose nanocrystals prepared in H3PW12O40-acetic acid system

Cellulose nanocrystals (CNC) were prepared by destruction of cotton cellulose using phosphotungstic acid in acetic acid medium. The study shows the influence of the heteropolyacid concentration, pre-activation, and hydrogen peroxide addition on the size of CNC particles. CNC were characterized using...

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Bibliographic Details
Published in:Cellulose (London) 2017-05, Vol.24 (5), p.2153-2162
Main Authors: Torlopov, Mikhail A., Udoratina, Elena V., Martakov, Ilia S., Sitnikov, Petr A.
Format: Article
Language:English
Subjects:
Acetic acid
Agglomerates
Bioorganic Chemistry
Cellulose
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Cotton
Differential scanning calorimetry
Glass
Hydrogen peroxide
Lamellar structure
Light diffraction
Lithium
Morphology
Nanocrystals
Natural Materials
Organic Chemistry
Original Paper
Photon correlation spectroscopy
Physical Chemistry
Polymer Sciences
Scanning electron microscopy
Sustainable Development
Thermogravimetric analysis
Titration
Transmission electron microscopy
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Summary:Cellulose nanocrystals (CNC) were prepared by destruction of cotton cellulose using phosphotungstic acid in acetic acid medium. The study shows the influence of the heteropolyacid concentration, pre-activation, and hydrogen peroxide addition on the size of CNC particles. CNC were characterized using the methods of dynamic light scattering, FTIR-spectroscopy, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, scanning and transmission electron microscopy, and potentiometric titration. CNC particles have highly-crystalline structure and rod-like morphology. Freeze-dried CNC hydrosols form lamellar or fibrous agglomerates, depending on the initial concentration of the CNC sol. Potentiometric titration results show increase in surface activity index and offset of pK a values for CNC active centers in comparison to initial cellulose material.
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-017-1256-3