Polyglycerol nanowhisker cellulose dendrimer nanomaterial and preparation method thereof

• Main Authors: CHEN JINGHUA, XU SHUQIN, MAO BAOLIANG
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a polyglycerol nano whisker cellulose dendrimer nanomaterial and a preparation method thereof. The method comprises the following steps of: crushing raw cotton linter puree into cotton fibers, feeding the cotton fibers into sulfuric acid for reaction, and carrying out centrifugation, dialysis and ultrasonic cell disruption technologies to obtain the nano-whisker cellulose; further, performing dialysis by using a TEMPO oxidation method, and freeze-drying to obtain carboxylated nano-whisker cellulose; and further feeding the carboxylated nanowhiskers into DMF (Dimethyl Formamide), carrying out nitrogen protection, stirring and heating, gradually grafting glycidol onto the surface hydroxyl groups, and then carrying out centrifugation, vacuum drying, dialysis and freeze-drying to obtain the first-generation polyglycerolated nanowhisker cellulose nanomaterial. According to the method, the dendrimer with different particle size ranges can be prepared by controlling the number of reaction tim