▎ 摘　　要

NOVELTY - Preparing modified coconut bran product comprises adding 44.5 g modified coconut husk of 1-2 mm into 32 g diethylaluminum hypophosphite and 3.1 g diethylenetriaminepentaacetic acid, adding 180 ml water, stirring at 95 degrees C to react 1-2 hours, adding 0.7 g potassium hydrogen tartrate and 2.6 g diethylenetriaminepentaacetic acid, reacting at 60 degrees C for 2 hours, adding 0.5 g 4-acetoxystyrene and 6.2 g tetraalkylammonium fluoride, reacting at 70 degrees C for 1-3 hours, allowing to stand for 0.6 hours, and drying at 105 degrees C for 2 hours to obtain modified coconut bran product. USE - Method for preparing modified coconut bran product is useful for the preparation of hygroscopic breathable and antibacterial polyurethane synthetic leather with spiny non woven fabric. ADVANTAGE - The method: enables to prepare polyurethane synthetic leather spunlace non-woven fabric, which has moisture absorption and breathable properties. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for : (1) preparing modified cotton non-woven fabric comprising immersing 44.7 g pure cotton spunlace non-woven fabric in 70 g 5% formic acid aqueous solution, and immersing for 30-90 minutes at 25-60 degrees C, taking out the cotton non-woven fabric, placing in a 60 g acetic acid aqueous solution with a mass concentration of 15%, taking out for 30-150 minutes, and washing 3-5 times with 100 ml of a mixture of ethanol and water in a volume ratio of 70:30, and drying; and (2) preparing carboxylated graphene sheet comprising adding 0.012 g graphene sheet to 400 ml concentrated sulfuric acid, 0.3 g 4-boric acid triphenylamine and 0.3 g 3,4,5-trifluorophenylboric acid and mixing, and the reaction temperature is 80 degrees C, condensing and refluxing in an ultrasonic cleaner with an ultrasonic power of 500 W and ultrasonic frequency of 100 KHz for 2 hours, diluting with 450 ml deionized water after ultrasonic, and filtering with a microporous membrane with a diameter of 0.2 mu m, repeating washing with deionized water until neutral, and finally drying at 80 degrees C for 8 hours, grinding into a fine powder to obtain a carboxylated graphene sheet, which is a graphene sheet produced by chemical vapor deposition.