期刊
CARBOHYDRATE POLYMERS
卷 110, 期 -, 页码 415-422出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.04.040
关键词
Nanocrystalline cellulose (NCC); Cellulose hydrolysis; Phosphotungstic acid (H3PW12O40); Characterization; Thermal stability
资金
- National Natural Science Foundation of China [21206814, 31370582, 21306216]
- National High Technology Research and Development Program (863 program) of China [2012AA022301]
In this work, a sustainable and green process to prepare nanocrystalline cellulose (NCC) from bleached hardwood pulp was demonstrated. Rod-like nanocrystalline cellulose with the size of 15-40 nm in width and hundreds of nanometers in length was obtained through H3PW12O40 (HPW)-catalyzed hydrolysis of bleached pulp fibers under the mild reaction conditions. Thermogravimetric analysis revealed that the resulting NCC exhibited much higher thermal stability than the partially sulfated NCC (prepared by sulfuric acid). In addition, the concentrated HPW could be easily recovered and recycled through the extraction with diethyl ether, and the recovered HPW could be reused for several rounds of cellulose hydrolysis without activity lost. These fundamental studies are of crucial importance for the development and application of NCC products/NCC-based biomaterials with good thermal stability. (C) 2014 Elsevier Ltd. All rights reserved.
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