Preparation method of polyaspartic acid semi-interpenetrating nano composite hydrogel

• Main Authors: REN LAIBIN, TONG DONGSHEN, HU JUN, CHEN HUANXIN, DAI GUANGLIN
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2021
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

The invention discloses a preparation method of polyaspartic acid semi-interpenetrating nano composite hydrogel, which comprises the following steps: step 1, adding maleic anhydride into distilled water, hydrolyzing in an oil bath, adding ammonia water, and stirring for reaction to obtain an intermediate solution; and step 2, dispersing montmorillonite in distilled water, sequentially adding the intermediate solution, the H3PO4 solution and the KH550 solution into the montmorillonite suspension, performing ultrasonic dispersion, drying to obtain an intermediate product, grinding, adding distilled water, hydrolyzing with the NaOH solution, neutralizing with the HCl solution, pouring into a sodium chloride-methanol saturated solution, precipitating, filtering, and drying to obtain the modified montmorillonite, and grinding to obtain a polyaspartic acid-montmorillonite composite material; and step 3, preparing a carboxymethyl cellulose solution, weighing the polyaspartic acid-montmorillonite composite material,