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
Cellulose nanofibrils generated from jute fibers with tunable polymorphs and crystallinity
TL;DR: In this paper, a facile method for the generation of CNF with tunable polymorphs and crystallinity via the alkali treatment of jute fibers under various conditions followed by (TEMPO)-mediated oxidation and mechanical disintegration is presented.
Journal ArticleDOI
Hydrogen bonds of sodium alginate/Antarctic krill protein composite material.
Lijun Yang,Jing Guo,Yue Yu,Qingda An,Liyan Wang,Shenglin Li,Xuelin Huang,Siyang Mu,Shanwei Qi +8 more
TL;DR: The increase of intermolecular hydrogen bonding led to the decrease of crystallinity, increase of apparent viscosity and surface tension, as well as obvious decrease of heat resistance of SA/AKP composite material.
Journal ArticleDOI
Surface modifications of nanocellulose: From synthesis to high-performance nanocomposites
TL;DR: Nanocellulose is at the cutting edge of current research owing to its highly useful features, such as abundance and renewability of its source, biocompatibility, nanoscale dimension, high specific surface area, and tunable surface chemistry as discussed by the authors.
Journal ArticleDOI
Preparation of cellulose nanofibers using green and sustainable chemistry
TL;DR: In this paper, TEMPO-oxidized cellulose nanofibers (TOCNs) with homogeneous widths (∼3nm) and high aspect ratios are described.
Journal ArticleDOI
A Skin-Inspired Stretchable, Self-Healing and Electro-Conductive Hydrogel with A Synergistic Triple Network for Wearable Strain Sensors Applied in Human-Motion Detection.
Chen Yuanyuan,Kaiyue Lu,Yuhan Song,Jingquan Han,Yiying Yue,Subir Kumar Biswas,Qinglin Wu,Huining Xiao +7 more
TL;DR: The strain sensor assembled by the hybrid hydrogel exhibits a sensitive, fast and stable current response for monitoring small/large-scale human movements in real-time, demonstrating promising applications in damage-free wearable electronics.
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.