Journal ArticleDOI
TEMPO-oxidized cellulose nanofibers
Reads0
Chats0
TLDR
The new cellulose-based nanofibers formed by size reduction process of native cellulose fibers by TEMPO-mediated oxidation have potential application as environmentally friendly and new bio- based nanomaterials in high-tech fields.Abstract:
Native wood celluloses can be converted to individual nanofibers 3–4 nm wide that are at least several microns in length, i.e. with aspect ratios >100, by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation and successive mild disintegration in water. Preparation methods and fundamental characteristics of TEMPO-oxidized cellulose nanofibers (TOCN) are reviewed in this paper. Significant amounts of C6 carboxylate groups are selectively formed on each cellulose microfibril surface by TEMPO-mediated oxidation without any changes to the original crystallinity (∼74%) or crystal width of wood celluloses. Electrostatic repulsion and/or osmotic effects working between anionically-charged cellulose microfibrils, the ζ-potentials of which are approximately −75 mV in water, cause the formation of completely individualized TOCN dispersed in water by gentle mechanical disintegration treatment of TEMPO-oxidized wood cellulose fibers. Self-standing TOCN films are transparent and flexible, with high tensile strengths of 200–300 MPa and elastic moduli of 6–7 GPa. Moreover, TOCN-coated poly(lactic acid) films have extremely low oxygen permeability. The new cellulose-based nanofibers formed by size reduction process of native cellulose fibers by TEMPO-mediated oxidation have potential application as environmentally friendly and new bio-based nanomaterials in high-tech fields.read more
Citations
More filters
Journal ArticleDOI
Strength and modulus improvement of wet-spun cellulose I filaments by sequential physical and chemical cross-linking
TL;DR: In this article, the CNF suspension was successfully wet-spun into highly oriented filaments owing to flow-induced and contact-induced alignment, and the resulting filaments show potential as an excellent replacement for naturally and industrially produced fibres.
Journal ArticleDOI
Flexible Transparent Sliced Veneer for AlternatingCurrent Electroluminescent Devices
Tao Zhang,Pei Yang,Yanzhen Li,Yizhong Cao,Yunlei Zhou,Minzhi Chen,Ziqi Zhu,Weimin Chen,Xiaoyan Zhou +8 more
TL;DR: In this article, a flexible alternating current electroluminescent (ACEL) device based on nanocellulose-derived transparent films has been proposed, which has received a great deal of attention due to their numerous merits.
Journal ArticleDOI
Floating Photocatalysts for Effluent Refinement Based on Stable Pickering Cellulose Foams and Graphitic Carbon Nitride (g-C3N4).
TL;DR: A buoyant Pickering photocatalyst carrier based on green cellulose nanofibers derived from wood that provides a new strategy for assembling green floating foams that can potentially carry a number of different photocatalysts.
Journal ArticleDOI
Microwave-assisted facile synthesis of TEMPO-oxidized cellulose beads with high adsorption capacity for organic dyes
TL;DR: In this paper, a facile, green and efficient microwave-assisted method was developed to oxidize cellulose hydrogel beads with neutral 2,2,6,6-tetramethylpiperidinyl-1-oxyl radical (TEMPO)-mediated system.
Journal ArticleDOI
Substrate role in coating of microfibrillated cellulose suspensions
TL;DR: In this article, a custom-built slot geometry is used to enable coating of highly viscous MFC suspensions on different paper-based substrates in a roll-to-roll process.
References
More filters
Journal ArticleDOI
Cellulose nanocrystals: chemistry, self-assembly, and applications.
TL;DR: Dr. Youssef Habibi’s research interests include the sustainable production of materials from biomass, development of high performance nanocomposites from lignocellulosic materials, biomass conversion technologies, and the application of novel analytical tools in biomass research.
Journal ArticleDOI
Polymer nanotechnology: Nanocomposites
Donald R Paul,Lloyd M. Robeson +1 more
TL;DR: In this paper, the technology involved with exfoliated clay-based nanocomposites and also include other important areas including barrier properties, flammability resistance, biomedical applications, electrical/electronic/optoelectronic applications and fuel cell interests.
Journal ArticleDOI
An Overview of Polylactides as Packaging Materials
TL;DR: The aim of this paper is to review the production techniques for PLAs, summarize the main properties of PLA and to delineate the main advantages and disadvantages of PLA as a polymeric packaging material.
Journal ArticleDOI
Review: current international research into cellulose nanofibres and nanocomposites
Stephen J. Eichhorn,Alain Dufresne,Mirta Ines Aranguren,Norma Esther Marcovich,Jeffrey B. Capadona,Stuart J. Rowan,Christoph Weder,Wim Thielemans,Maren Roman,Scott Renneckar,Wolfgang Gindl,Stefan Veigel,Jozef Keckes,Hiroyuki Yano,Kentaro Abe,Masaya Nogi,Antonio Norio Nakagaito,A. Mangalam,John Simonsen,A. S. Benight,Alexander Bismarck,Lars Berglund,Ton Peijs +22 more
TL;DR: An overview of recent progress in the area of cellulose nanofibre-based nanocomposites is given in this article, with particular emphasis on applications, such as reinforced adhesives, to make optically transparent paper for electronic displays, to create DNA-hybrid materials, to generate hierarchical composites and for use in foams, aerogels and starch nanocom composites.
Journal ArticleDOI
Cellulose nanofibers prepared by TEMPO-mediated oxidation of native cellulose
TL;DR: Never-Dried and once-dried hardwood celluloses were oxidized by a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated system, and highly crystalline and individualized cellulose nanofibers, dispersed in water, were prepared by mechanical treatment of the oxidized celluloses/water slurries.