Journal ArticleDOI
Effect of Trace Electrolyte on Liquid Crystal Type of Cellulose Microcrystals
Jun Araki and,Shigenori Kuga +1 more
TLDR
The rodlike microcrystal suspension prepared by sulfuric acid hydrolysis of bacterial cellulose was found to undergo spontaneous nematic phase separation after complete desalination as mentioned in this paper.Abstract:
The rodlike microcrystal suspension prepared by sulfuric acid hydrolysis of bacterial cellulose was found to undergo spontaneous nematic phase separation after complete desalination. This phase separation was preceded by a birefringent glassy-like state for about 1 week. Addition of trace electrolyte (<1 mM NaCl) caused remarkable changes in phase separation behavior; i.e., the separation was complete in 2 days and the anisotropic phase became chiral nematic. This phenomenon can be explained by the change in the effective particle shape, from cylindrical to the twisted rod as a result of screening of surface charge.read more
Citations
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Cellulose nanomaterials review: structure, properties and nanocomposites
Robert J. Moon,Robert J. Moon,Ashlie Martini,John A. Nairn,John Simonsen,Jeffrey P. Youngblood +5 more
TL;DR: This critical review provides a processing-structure-property perspective on recent advances in cellulose nanoparticles and composites produced from them, and summarizes cellulOSE nanoparticles in terms of particle morphology, crystal structure, and properties.
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
Key advances in the chemical modification of nanocelluloses
TL;DR: This review collocates current knowledge in the research and development of nanocelluloses and emphasizes more particularly on the chemical modification routes developed so far for their functionalization.
Journal ArticleDOI
The Shape and Size Distribution of Crystalline Nanoparticles Prepared by Acid Hydrolysis of Native Cellulose
Samira Elazzouzi-Hafraoui,Yoshiharu Nishiyama,Jean-Luc Putaux,Laurent Heux,Frédéric Dubreuil,Cyrille Rochas +5 more
TL;DR: The shape and size distribution of crystalline nanoparticles resulting from the sulfuric acid hydrolysis of cellulose from cotton, Avicel, and tunicate were investigated using transmission electron microscopy and atomic force microscopy as well as small- and wide-angle X-ray scattering.
Journal ArticleDOI
Cellulose nanowhiskers: promising materials for advanced applications
TL;DR: In this paper, the production, structure, properties and applications of cellulose nanowhiskers of rod-like structures have been discussed, and a wide range of chemical modifications have been described, including 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation, polymerisation from the surface using Reversible Addition-Fragmentation chain Transfer (RAFT) and Atom Transfer Radical Polymerisation (ATRP), and rendering of the surface with cationic and anionic charge.
References
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Journal ArticleDOI
The effects of shape on the interaction of colloidal particles
TL;DR: In this article, it was shown that colloids in general are apt to exhibit considerable deviations from Raoult's law and that crystalline phases retaining a fair proportion of solvent may separate from concentrated solutions.
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Helicoidal self-ordering of cellulose microfibrils in aqueous suspension.
TL;DR: An in vitro system that attracts by its simplicity, where above a critical concentration the colloidal dispersion separates spontaneously into a chiral nematic liquid crystalline phase and solidifies into regularly twisted fibrillar layers that mimic the structural organization of helicoids in nature.
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Phase transitions in lyotropic colloidal and polymer liquid crystals
TL;DR: An overview of theory and experiments on liquid crystal phases which appear in solutions of elongated colloidal particles or stiff polymers is given in this article, along with extensions to polydisperse solutions and soft interactions.
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Effects of Ionic Strength on the Isotropic−Chiral Nematic Phase Transition of Suspensions of Cellulose Crystallites
TL;DR: In this article, the formation of ordered phases of acid-hydrolyzed cellulose suspensions was studied as a function of cellulose crystallite concentration and added electrolyte (HCl, NaCl, and KCl) concentrations.
Journal ArticleDOI
Steric Stabilization of a Cellulose Microcrystal Suspension by Poly(ethylene glycol) Grafting
TL;DR: A sterically stabilized aqueous suspension of rod-like cellulose microcrystals was prepared by the combination of acid hydrolysis of native cellulose, oxidative carboxylation of micro-crystals, and grafting of poly(ethylene glycol) having a terminal amino group on one end (PEG-NH2, MW = 1000) using water-soluble carbodiimide as discussed by the authors.