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Updated: Jun 7, 2026

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

Published on: June 17, 2014

TEMPO-oxidized cellulose nanofibers.

Akira Isogai¹, Tsuguyuki Saito, Hayaka Fukuzumi

¹Department of Biomaterial Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan. aisogai@mail.ecc.u-tokyo.ac.jp

|October 20, 2010

Summary

Researchers developed TEMPO-oxidized cellulose nanofibers (TOCN) from wood. These strong, flexible, and transparent nanofibers offer potential as eco-friendly nanomaterials for advanced applications.

Area of Science:

Materials Science
Nanotechnology
Biomaterials

Background:

Native wood celluloses are abundant natural polymers.
Developing advanced nanomaterials from renewable resources is crucial.

Purpose of the Study:

To review the preparation and characteristics of TEMPO-oxidized cellulose nanofibers (TOCN).
To highlight the potential of TOCN as novel bio-based nanomaterials.

Main Methods:

TEMPO-mediated oxidation of native wood celluloses to introduce carboxylate groups.
Mild disintegration of oxidized fibers to form individual nanofibers.
Characterization of nanofiber properties, including mechanical strength and optical transparency.

Main Results:

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Individualized nanofibers (3-4 nm width, micron length, aspect ratio >100) were produced.
TEMPO oxidation selectively formed C6 carboxylate groups without altering cellulose crystallinity.
TOCN films exhibited high tensile strength (200-300 MPa) and elastic modulus (6-7 GPa).
TOCN-coated films showed extremely low oxygen permeability.

Conclusions:

TOCN are successfully prepared from wood cellulose via TEMPO oxidation.
These nanofibers possess excellent mechanical and barrier properties.
TOCN represent promising, environmentally friendly nanomaterials for high-tech applications.