Nanomaterial of polyglycerol grafted cellulose nanocrystal dendrimer and preparation method thereof
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United States of America Patent
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Sep 19, 2023
Grant Date -
Jul 20, 2023
app pub date -
Mar 23, 2023
filing date -
Jan 6, 2021
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Abstract
The invention provides a nanomaterial of polyglycerol grafted cellulose nanocrystal dendrimer and a preparation method thereof. In the present invention, the cotton linter pulp is pulverized into flocculent fibers, fed to sulfuric acid, and reacted. After centrifugation, dialysis and ultrasonic cell disruption, cellulose nanocrystals are obtained. Carboxylated cellulose nanocrystals are further obtained after oxidation with TEMPO, dialysis, and freeze-drying. The carboxylated nanocrystals are further added to DMF, and under a nitrogen atmosphere, glycidol is grafted to the hydroxyl groups on the surface by heating with stirring. After the reaction is completed, the product is centrifuged, dried under vacuum, dialyzed, and freeze dried to obtain a nanomaterial of primary polyglycerol grafted cellulose nanocrystals. Dendrimers with different particle size ranges can be prepared by controlling the number of reactions, which contain a large number of hydroxyl groups on the surface, and are amenable to various modifications.
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