PREPARATION OF SOLVENT AND POLYMER REDISPERSIBLE FORMULATIONS OF DRIED CELLULOSE NANOCRYSTALS (CNC)

A redispersible, chemically modified cellulose nanocrystal comprising an ionic adduct of a negative ion of sulfate, phosphate half-ester, carboxylic acid or mixtures thereof and a positively charged protonated amine compound. The modified cellulose nanocrystals are readily redispersible in a variety...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	BERRY, RICHARD MCKINNON, BOURASSA, PHILIPPE, METHOT, MYRIAM
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CRYSTAL GROWTH DERIVATIVES THEREOF GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH THEIR PREPARATION OR CHEMICAL WORKING-UP UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A redispersible, chemically modified cellulose nanocrystal comprising an ionic adduct of a negative ion of sulfate, phosphate half-ester, carboxylic acid or mixtures thereof and a positively charged protonated amine compound. The modified cellulose nanocrystals are readily redispersible in a variety of media and produce stable emulsions. The modified cellulose nanocrystals are produced by adding to an aqueous suspension of acidic cellulose nanocrystals, a quantity of the amine compound to increase the pH of the suspension to about below the pKa of said amine, mixing and drying the resulting suspension to produce the redispersible CNC. L'invention concerne un nanocristal de cellulose redispersable, chimiquement modifié, comprenant un produit d'addition ionique d'un ion négatif d'un sulfate, d'un demi-ester de phosphate, d'un acide carboxylique ou de mélanges de ceux-ci, et d'un composé amine protoné chargé positivement. Les nanocristaux de cellulose modifiés sont facilement redispersables dans divers milieux et produisent des émulsions stables. Les nanocristaux de cellulose modifiés sont produits par addition à une suspension aqueuse de nanocristaux de cellulose acides, d'une certaine quantité du composé amine pour augmenter le pH de la suspension jusqu'à juste en dessous du pKa de ladite amine, puis par mélange et séchage de la suspension résultante pour produire les nanocristaux de cellulose redispersables.