Journal
BIOMACROMOLECULES
Volume 14, Issue 1, Pages 248-253Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm301674e
Keywords
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Funding
- Japan Society for the Promotion of Science (JSPS) [21228007, 23688020, 24-390]
- Wallenberg Wood Science Center (WWSC)
- Grants-in-Aid for Scientific Research [23688020, 21228007] Funding Source: KAKEN
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We report the mechanical strength of native cellulose nanofibrils. Native cellulose nanofibrils, purified from wood and sea tunicate, were fully dispersed in water via a topochemical modification of cellulose nanofibrils using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) as a catalyst. The strength of individual nanofibrils was estimated based on a model for the sonication-induced fragmentation of filamentous nanostructures. The resulting strength parameters were then analyzed based on fracture statistics. The mean strength of the wood cellulose nanofibrils ranged from 1.6 to 3 GPa, depending on the method used to measure the nanofibril width. The highly crystalline, thick tunicate cellulose nanofibrils exhibited higher mean strength of 3-6 GPa. The strength values estimated for the cellulose nanofibrils in the present study are comparable with those of commercially available multiwalled carbon nanotubes.
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