期刊
BIOMACROMOLECULES
卷 10, 期 9, 页码 2571-2576出版社
AMER CHEMICAL SOC
DOI: 10.1021/bm900520n
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- New Energy and Industrial Technology Development Organization (NEDO), Japan
- Grants-in-Aid for Scientific Research [21228007] Funding Source: KAKEN
The elastic modulus of single microfibrils from tunicate (Halocynthia papillosa) cellulose was measured by atomic force microscopy (AFM). Microfibrils with cross-sectional dimensions 8 x 20 nm and several micrometers in length were obtained by oxidation of cellulose with 2,2,6,6-tetramethylpiperiditie-1-oxyl radical (TEMPO) as a catalyst and subsequent mechanical disintegration in water and by sulfuric acid hydrolysis. The nanocellulosic materials were deposited on a specially designed silicon wafer with grooves 227 nm in width, and a three-point bending test was applied to determine the elastic modulus using an AFM cantilever. The elastic moduli of single microfibrils prepared by TEMPO-oxidation and acid hydrolysis were 145.2 +/- 31.3 and 150.7 +/- 28.8 GPa, respectively. The result showed that the experimentally determined modulus of the highly crystalline tunicate microfibrils was in agreement with the elastic modulus of native cellulose crystals.
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