▎ 摘　　要

NOVELTY - Preparation of hard hydrophobic polycarbonate material, involves (i) preparing amide dispersion, (ii) preparing alkyl esterified graphene oxide solution, (iii) preparing methyl graphene oxide dispersion, (iv) mixing alkyl esterified graphene oxide solution and ester dispersion, adding lithium hydroxide, heating, performing distillation, removing tetrahydrofuran, obtaining methyl graphene oxide dispersion,(v) mixing methyl graphene oxide dispersion with deionized water, adding sodium borohydride, heating, filtering, washing precipitate, and vacuum drying to obtain methyl graphene. USE - Preparation of hard hydrophobic polycarbonate material (claimed). ADVANTAGE - The method effectively improves the compatibility between the graphene and the polymer matrix, improves the stability and strength of the finished product, increases the contact angle of the polymer and water, and effectively improves the surface hydrophobic properties of the finished material. DETAILED DESCRIPTION - Preparation of hard hydrophobic polycarbonate material, involves (i) taking 2-3 pts. wt. calcium stearate, 1-2 pts. wt. barium stearate, mixing, adding deionized water in an amount 4-7 times the weight of the mixture, adding 0.6-1 pt. wt. saturated octadecamide, stirring evenly to obtain amide dispersion, (ii) taking 10-14 pts. wt. graphene oxide, adding to 5-8 times the weight of pentaerythritol, adding 2-3 pts. wt. dodecafluoropentylpropyl trimethoxysilane, increasing the temperature to 60-70 degrees C, heat-preserving for 1-2 hours, adding 20-25 pts. wt. sulfuric acid with concentration of 60-70%, dripping 3-4 times the weight of polyvinylpyrrolidone to the mixture, increasing the temperature to 86-90 degrees C, heat-preserving for 1-2 hours, discharging, cooling to room temperature and obtaining alkyl esterified graphene oxide solution, (iii) taking 1-3 pts. wt. sorbitan monooleate, adding to 10-14 times the weight of tetrahydrofuran, stirring evenly to obtain ester dispersion, (iv) adding alkyl esterified graphene oxide solution and ester dispersion, stirring evenly, adding 0.7-1 pt. wt. lithium hydroxide, increasing the temperature to 70-80 degrees C, heat-preserving for 2-3 hours, performing distillation, removing tetrahydrofuran, obtaining methyl graphene oxide dispersion, (v) taking methyl graphene oxide dispersion, adding to 20-30 times its weight in deionized water, stirring evenly, adding 5-7 pts. wt. sodium borohydride, increasing the temperature to 60-70 degrees C, heat-preserving for 3-5 hours, filtering, washing the precipitate, vacuum drying completely at 90-100 degrees C to obtain methyl graphene, (vi) adding methyl graphene to 10-13 times its weight in dimethylformamide, ultrasonically dispersing for 3-5 minutes to obtain methyl graphene amide dispersion, (vii) adding 110-130 pts. wt. polycarbonate into a reactor, increasing the temperature to 70-85 degrees C, adding methyl graphene amide dispersion, ultrasonically processing for 10-20 minutes, adding 0.8-1 pt. wt. dicumyl peroxide, heat-preserving for 1-2 hours, discharging, stirring to room temperature, performing suction filtration, washing the precipitate and drying at room temperature to obtain hard hydrophobic polycarbonate material.