Journal
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
Volume 23, Issue 2, Pages 101-106Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cossms.2019.01.001
Keywords
Wood cellulose; Microfibril; Nanonetwork; Nanofiber; Nanocrystal; TEMPO
Funding
- Core Research for Evolutional Science and Technology (CREST) of the Japan Science and Technology Agency (JST) [JPMJCR13B2]
- Japan Monbukagakusho Fellowship for Foreign Ph.D. Students
Ask authors/readers for more resources
When wood cellulose fibers are oxidized with NaClO and catalytic amounts of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and NaBr in water at pH 10, significant amounts of sodium carboxylate groups (<= 1.7 mmol/g) are introduced into the oxidized celluloses. The original fibrous morphologies and cellulose I crystal structures are unchanged by oxidation. The TEMPO-oxidized cellulose fibers can be converted to partially fibrillated nanonetworks, completely individualized cellulose nanofibers with high aspect ratios, and needle-like cellulose nanocrystals with low aspect ratios by controlling the conditions of mechanical disintegration in water. It is therefore possible to prepare diverse nanocelluloses with different morphologies and properties from the same TEMPO-oxidized cellulose fibers, for various end uses and applications. All TEMPO-oxidized nanocelluloses contain large amounts of carboxylate groups. These provide scaffolds for versatile surface modification of nanocelluloses by simple ion exchange of sodium for other metal ions and alkylammonium ions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available