期刊
FIBERS AND POLYMERS
卷 18, 期 2, 页码 272-277出版社
KOREAN FIBER SOC
DOI: 10.1007/s12221-017-6548-6
关键词
Nanocrystalline cellulose; Acid-hydrolysis; Cellulose; Bleaching; Alkali treatment
资金
- Nuclear R&D program through the National Research Foundation grant - Ministry of Science, ICT and Future Planning, Korea
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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