Transparent and High Gas Barrier Films of Cellulose Nanofibers Prepared by TEMPO-Mediated Oxidation

Softwood and hardwood celluloses were oxidized by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation. The TEMPO-oxidized cellulose fibers were converted to transparent dispersions in water, which consisted of individual nanofibers 3−4 nm in width. Films were then prepared from t...

Full description

Saved in:
Bibliographic Details
Published inBiomacromolecules Vol. 10; no. 1; pp. 162 - 165
Main Authors Fukuzumi, Hayaka, Saito, Tsuguyuki, Iwata, Tadahisa, Kumamoto, Yoshiaki, Isogai, Akira
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 12.01.2009
Subjects
Applied sciences
Cellulose - chemical synthesis
Cellulose - chemistry
Cellulose and derivatives
Cyclic N-Oxides - chemistry
Exact sciences and technology
Macromolecular Substances - chemistry
Materials Testing
Membranes, Artificial
Nanostructures - chemistry
Natural polymers
Oxidation-Reduction
Particle Size
Physicochemistry of polymers
Surface Properties
Temperature
Time Factors
Oxygen
Transparency
Transport properties
Nitroxyl
Film
Hydrophobization
Cellulose
Mechanical properties
Nanofiber
Experimental study
Surface treatment
Sodium Hypochlorites
Gas permeability
Chemical modification
Wettability
Optical properties
Morphology
Preparation
Cellulose derivatives
Piperidine derivatives
Surface properties
Polyacid
Oxidation
Heterogeneous reaction
Online AccessGet full text

Cover

More Information
Summary:Softwood and hardwood celluloses were oxidized by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation. The TEMPO-oxidized cellulose fibers were converted to transparent dispersions in water, which consisted of individual nanofibers 3−4 nm in width. Films were then prepared from the TEMPO-oxidized cellulose nanofibers (TOCN) and characterized from various aspects. AFM images showed that the TOCN film surface consisted of randomly assembled cellulose nanofibers. The TOCN films prepared from softwood cellulose were transparent and flexible and had extremely low coefficients of thermal expansion caused by high crystallinity of TOCN. Moreover, oxygen permeability of a polylactic acid (PLA) film drastically decreased to about 1/750 by forming a thin TOCN layer on the PLA film. Hydrophobization of the originally hydrophilic TOCN films was achieved by treatment with alkylketene dimer. These unique characteristics of the TOCN films are promising for potential applications in some high-tech materials.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1525-7797
1526-4602
DOI:10.1021/bm801065u