Journal
FIBERS AND POLYMERS
Volume 18, Issue 2, Pages 272-277Publisher
KOREAN FIBER SOC
DOI: 10.1007/s12221-017-6548-6
Keywords
Nanocrystalline cellulose; Acid-hydrolysis; Cellulose; Bleaching; Alkali treatment
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Funding
- Nuclear R&D program through the National Research Foundation grant - Ministry of Science, ICT and Future Planning, Korea
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Nanocrytalline cellulose (NCC) was isolated using cellulose extracted from two different precursor materials: Eucalyptus globulus and rice straw. The two ground precursor materials were autoclaved with a 10 % NaOH solution at 120 degrees C for 3 h. The alkali-treated precursor materials were bleached using sodium chlorite/acetic acid and sodium hypochlorite. The bleached precursor materials were acid-hydrolyzed in 65 % (w/w) sulfuric acid at 45 degrees C for 30-120 min. The changes in the chemical composition of the two precursor materials were studied before and after bleaching by Fourier transform infrared spectroscopy according to the NREL report and TAPPI standards. Hydrolyzates were characterized by Xray diffractometry, thermogravimetric analysis, Zeta-potential analysis, and transmission electron microscopy. The results revealed that the physical properties of NCC were strongly dependent on the acid-hydrolysis time.
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