▎ 摘　　要

NOVELTY - The preparation method of graphene dip coated kapok fiber oil-absorbing material involves: (1) adding graphite powder to three-necked flask, then placing three-necked flask in ice-water bath to maintain the temperature at 0 degrees C, slowly adding concentrated sulfuric acid, then adding potassium nitrate and potassium permanganate, stirring the solution in ice-water bath, removing ice bath after completion of the reaction, placing in air, then placing in water bath to react, adding deionized water using dripping funnel, and stirring the reaction at room temperature for 1 hour. USE - The method is useful for preparing graphene dip coated kapok fiber oil-absorbing material (claimed). ADVANTAGE - The method prepares graphene dip coated kapok fiber oil-absorbing material with large oil-absorbing capacity, quick oil-absorbing speed and good biodegradability. DETAILED DESCRIPTION - The preparation method of graphene dip coated kapok fiber oil-absorbing material involves: (1) adding 5 g graphite powder to 2 l three-necked flask, then placing the three-necked flask in ice-water bath to maintain the temperature at 0 degrees C, slowly adding 115 ml concentrated sulfuric acid, then adding 2.5 g potassium nitrate and 15 g potassium permanganate, stirring the solution in ice-water bath at 250 rpm for 2 hours, removing ice bath after completion of the reaction, placing in air for 1 hour, then placing in water bath to react at 35 degrees C for 1 hour, adding 115 ml deionized water using dripping funnel, stirring the reaction at room temperature for 1 hour after the addition of deionized water, adding 700 ml deionized water to dilute, dripping 50 ml hydrogen peroxide having concentration of 30%, and performing reaction for 1 hour to get mixture; (2) centrifuging the mixture using high-speed centrifuge for 10 minutes, washing with hydrochloric acid having concentration of 5% after centrifugation, then rinsing with water to neutral, dialyzing, drying, grinding the product into powder using mortar, mixing with deionized water in container at rate of 10 mg/ml, and ultrasonically peeling using ultrasonic machine having frequency of 50 Hz at 50 degrees C for 2 hours to obtain graphene dispersion; (3) weighing 10 g kapok fiber, then putting into 300 ml sodium hydroxide aqueous solution having mass concentration of 8 g/l, placing in constant temperature water bath at a temperature of 90 degrees C, carrying out alkali treatment for 2 hours, then repeatedly washing with deionized water to neutral, and naturally drying; (4) adding kapok fiber to 200 ml sodium chlorite aqueous solution having mass concentration of 1%, adjusting the pH-value of solution to 4.5 with acetic acid, treating at 8 degrees C for 1 hour, and then repeatedly washing with distilled water to neutral; (5) taking 1 g treated kapok fiber, then naturally drying at room temperature for 1 day, immersing in graphene dispersion liquid, performing ultrasonic dispersion for 30 minutes, drying at 80 degrees C for 30 minutes, then immersing in 100 ml 0.05 mole/l sodium borohydride solution, stirring the mixture at 95 degrees C for 1 hour, removing water after washing to neutral, and then drying at 80 degrees C for 60 minutes to get graphene dip coated kapok fiber; and (6) adding 3 g graphene dip coated kapok fiber to 70 ml distilled water under stirring at 500 rpm, successively adding 5 ml dimethylacetamide containing 0.045 g benzoyl peroxide and 1.1 g styrene, carrying out reaction at constant temperature of 80 degrees C for 2 hours, washing the product with deionized water after completion of the reaction, filtering and placing in blast oven, and drying at 60 degrees C to constant weight to obtain product.