▎ 摘　　要

NOVELTY - Polyallyl benzamide-graphene hydrogel comprises 12-18 pts. wt. benzoyl chloride, 10-15 pts. wt. allylamine, 0.4-0.7 pts. wt. condensation catalyst, 0.5-2 pts. wt. polymerization initiator, 4-7 pts. wt. graphene, 57-73 pts. wt. oxygen-free ultrapure water and 0.1-0.3 pts. wt. tetramethylethylenediamine. USE - Used as polyallyl benzamide-graphene hydrogel. ADVANTAGE - The hydrogel: contains polyallyl benzamide, which having strong hydrophilicity and chemical stability, which improves the water absorption and water retention of the hydrogel; has stable chemical property, excellent thermal stability, does not easily decompose at high temperature, and improved durability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the benzamide-graphene hydrogel comprising (i) passing nitrogen or argon inert gas into a 1000 ml three-necked flask to remove air, then adding 400 ml anhydrous N, N-dimethylformamide into the three-necked flask, adding 12-18 pts. wt. benzoyl chloride, 10-15 pts. wt. allylamine, and 0.4-0.7 pts. wt. condensation catalyst in order, placing the three-necked flask in a constant temperature oil bath, heating at 130-135 degrees C, stirring uniformly using magnetic stirrer for 12-15 hours, subjecting the reaction to thin-layer chromatography, transferring the reaction solution in the three-neck flask into a 2000 ml separatory funnel, adding 500 ml distilled water and 800 ml ethyl acetate for extraction, taking out the organic layer of ethyl acetate, extracting again by adding 500 ml distilled water to obtain organic layer of ethyl acetate, distilling off the ethyl acetate under reduced pressure by a rotary evaporator, subjecting the concentrated mixture to thin-layer chromatography on a silica gel chromatography column, where the eluent is mixture of petroleum ether and ethyl acetate in a ratio of 5:1, enriching the isolated product, and removing the eluent by concentration under reduced pressure using a rotary distillation under reduced pressure distillation and a oil pump suction filtration to obtain allyl benzamide, (ii) adding 400 ml ethylene glycol into a 1000 ml beaker, adding allyl benzamide and 0.5-2 pts. wt. polymerization initiator in order and stirring well, transferring the reaction solution in the beaker into a high-pressure hydrothermal reaction kettle, placing the reaction kettle in a reactor heater, heating to 110-115 degrees C, and reacting for 8-10 hours, cooling to room temperature, filtering the reaction material in the reaction kettle through a Buchner funnel to obtain off-white floccule, washing the off-white floccule with 3000-3500 ml distilled water, heating the cleaned floccule in an oven at 70-75 degrees C and drying for 6-8 hours to obtain off-white solid polyallyl benzamide of formula (II), and (iii) passing nitrogen or argon inert gas into a 1000 ml three-necked flask to remove air, then adding polyallyl benzamide, 57-73 pts. wt. oxygen-free ultrapure water, 4-7 pts. wt. graphene, and 0.1-0.3 pts. wt. tetramethylethylenediamine into the three-necked flask, placing the three-necked flask in an ultrasonic processor, the ultrasonic frequency is 25-30 KHz, the ultrasonic power is 1800 W, and performing ultrasonic dispersion treatment for 3-4 hours, washing the surface of the gel semi-finished product with 2000-2500 ml distilled water, drying, and injecting into a mold to be sealed to obtain final product.