Isolation and characterization of cellulose nanocrystals from Chinese medicine residues

Nanocellulose has become a vital material with excellent and crucial properties in the field of nanotechnology and advanced materials science. Plant-based traditional Chinese medicines are mostly plant rhizomes, which contain a large amount of cellulose, hemicellulose, and lignin. In this study, car...

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Bibliographic Details
Published in:Biomass conversion and biorefinery 2022-10, Vol.14 (21), p.27745-27754
Main Authors: He, Qiang, Bai, Yu, Lu, Yuxi, Cui, Bo, Huang, Ziqiang, Yang, Qince, Jiang, Donghua, Shao, Dongwei
Format: Article
Language:English
Subjects:
Biotechnology
Cellulose
Chinese medicine
Crystallinity
Energy
Fourier transforms
Hydrogen bonds
Infrared analysis
Infrared spectroscopy
Nanocrystals
Nanomaterials
Original Article
Oxidation
Particle size
Renewable and Green Energy
Residues
Thermal utilization
Thermodynamic properties
Thermogravimetric analysis
Traditional Chinese medicine
X-ray diffraction
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Summary:Nanocellulose has become a vital material with excellent and crucial properties in the field of nanotechnology and advanced materials science. Plant-based traditional Chinese medicines are mostly plant rhizomes, which contain a large amount of cellulose, hemicellulose, and lignin. In this study, carboxylated cellulose nanocrystals (CNCs) were prepared from traditional Chinese medicine residues (CMR) by sequential periodate-chlorite oxidation without mechanical treatment. The obtained nanocelluloses were analyzed by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and X-ray diffractometry (XRD); the carboxyl content and specific surface area were also measured, simultaneously. XRD results revealed that the crystallinity index decreased after sequential oxidation; however, the cellulose I structure was maintained. From the morphology analysis, the average length and width of CNCs were 139.3 and 10 nm, respectively. From the FTIR analysis, with the particle size decreasing, hydrogen bonds were broken and recombined. TGA results showed that the thermal property was decreased with a reduction of nanocellulose particle size and crystallinity index. This study is the first to refine utilization of traditional Chinese medicine residues as a potential source of cellulose, that is, to prepare nanocellulose efficiently with high carboxyl content which finds its application in nanomaterials.
ISSN:2190-6815
2190-6823
DOI:10.1007/s13399-022-03380-6