Repository of Research and Investigative Information

Repository of Research and Investigative Information

Baqiyatallah University of Medical Sciences

Optimization of homogenization-sonication technique for the production of cellulose nanocrystals from cotton linter

(2019) Optimization of homogenization-sonication technique for the production of cellulose nanocrystals from cotton linter. International Journal of Biological Macromolecules. pp. 374-381. ISSN 0141-8130

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Abstract

Recently, cellulose nanocrystals (CNCs) have attracted a significant interest in different fields including drug delivery, biomedical, and food applications. In this study, homogenization-ultrasonication as a non-hazardous, time-saving, and organic solvent free technique was applied for fabrication of CNCs from cotton linter, containing over 90 cellulose. First, acid hydrolysis was applied on raw cellulose using sulfuric acid at 55, 60 and 65 for 3, 5 and 7 min and at various homogenization speeds. Final CNCs were produced by ultrasonication (350 W) for 3 min. The physicochemical properties of CNCs, particle size, X-ray diffraction (XRD) pattern, Fourier Transform Infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), atomic force microscopy (AFM) and transmission electron microscopy (TEM) were studied. Production yield of CNCs was 59-72, and their water holding capacity was two times higher than raw cellulose. The average length of CNCs was 133 nm with a width of 10 nm and the XRD pattern revealed a 82 crystallinity degree. The FTIR spectrum detected almost similar frequencies in the raw and crystalline cellulose, while intensity of CNC peaks was reduced. TEM results showed rod-like CNCs with a length of 229 nm. TGA results also showed that thermal stability of CNCs was reduced compared to raw cellulose. (C) 2019 Elsevier B.V. All rights reserved.

Item Type: Article
Keywords: Cotton linter Optimization CNCs high-pressure homogenization sugarcane bagasse nanocellulose extraction hydrolysis chitosan whiskers fibers waste crystallinity Biochemistry & Molecular Biology Chemistry Polymer Science
Divisions:
Page Range: pp. 374-381
Journal or Publication Title: International Journal of Biological Macromolecules
Journal Index: ISI
Volume: 137
Identification Number: https://doi.org/10.1016/j.ijbiomac.2019.06.241
ISSN: 0141-8130
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/2380

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