Journal ArticleDOI
TEMPO-oxidized cellulose nanofibers
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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
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Journal ArticleDOI
TEMPO oxidized nano-cellulose containing thermo-responsive injectable hydrogel for post-surgical peritoneal tissue adhesion prevention.
TL;DR: By taking advantages of thermo gelling, high stability, non-invasive way of application and rapid recovery potential, TOCN containing bio compatible hydrogel could be used as a cost-effective barrier to efficiently inhibit post-surgical peritoneal adhesions.
Journal ArticleDOI
Doubly cross-linked nanocellulose hydrogels with excellent mechanical properties
TL;DR: Here, the doubly cross-linked (DC) nanocellulose hydrogels with both ionic and chemical crosslinks were prepared and exhibited more improvement in mechanical properties than singlyCross-linked nano cellulose Hydrogels.
Journal ArticleDOI
Silver nanoparticle decorated cellulose nanofibrous membrane with good antibacterial ability and high water permeability
Liping Chen,Xinsheng Peng +1 more
TL;DR: In this paper, a simple filtration process was used to prepare silver nanoparticle decorated cellulose nanofibrous (CNFs) membrane. But this membrane is not suitable for field water treatment during emergency events.
Journal ArticleDOI
Mechanically strong and thermosensitive hydrogels reinforced with cellulose nanofibrils
TL;DR: In this article, cellulose nanofibril (CNF) was used as a reinforcing agent for the preparation of PEG-based thermosensitive hydrogels through radical copolymerization.
Book ChapterDOI
The use of biomass for packaging films and coatings
TL;DR: In this paper, a review of biomaterials which can be used to develop food packaging structures (especially films and coatings), their properties and interactions, and how they influence the packaging performance.
References
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Journal ArticleDOI
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Journal ArticleDOI
Review: current international research into cellulose nanofibres and nanocomposites
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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.