A comparison of cellulose nanocrystals and cellulose nanofibres extracted from bagasse using acid and ball milling methods

Rahimi Kord Sofla, Maryam, Brown, Richard J., Tsuzuki, Takuya, & Rainey, Thomas J. (2016) A comparison of cellulose nanocrystals and cellulose nanofibres extracted from bagasse using acid and ball milling methods. Advances in Natural Sciences: Nanoscience and Nanotechnology, 7(3). (In Press)

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Abstract

This study compared the fundamental properties of cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) extracted from sugarcane bagasse. Conventional hydrolysis was used to extract CNC while ball milling was used to extract CNF. Images generated by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) showed CNC was needle-like with relatively lower aspect ratio and CNF was rope-like in structure with higher aspect ratio. Fourier-transformed infrared spectra showed that the chemical composition of nanocellulose and extracted cellulose were identical and quite different from bagasse. Dynamic light scattering studies showed that CNC had uniform particle size distribution with a median size of 148 nm while CNF had a bimodal size distribution with median size 240 ± 12 nm and 10 µm. X-ray diffraction showed that the amorphous portion was removed during hydrolysis; this resulted in an increase in the crystalline portion of CNC compared to CNF. Thermal degradation of cellulose initiated at a much lower temperature, in the case of the nanocrystals while the CNF prepared by ball milling were not affected, indicating higher thermal stability.

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ID Code: 96040
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: cellulose, ball milling, cellulose nanofibrils, cellulose nanocrystals, bagasse
DOI: 10.1088/2043-6262/7/3/035004
ISSN: 2043-6262
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Facilities: Central Analytical Research Facility
Copyright Owner: Copyright 2016 IOP Publishing
Deposited On: 12 Jun 2016 22:38
Last Modified: 08 Aug 2016 01:17

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