▎ 摘　　要

NOVELTY - Preparation amino graphene/polyvinylidene fluoride piezoelectric nano-electrospinning film includes dispersing graphene oxide in mixed solvent of absolute ethanol and water, adding triethoxyaminosilane, sonicating, stirring, filtering to obtain amino-modified graphene oxide, washing with distilled water, and vacuum-drying; dispersing amino-modified graphene oxide in distilled water, ultrasonically dispersing, adding sodium borohydride, heating, filtering to obtain amino graphene, washing with distilled water, and vacuum-drying; and adding N,N-dimethylformamide, acetone and polyvinylidene fluoride, stirring to obtain electrospinning solution, and electrospinning. USE - Method for preparation amino graphene/polyvinylidene fluoride piezoelectric nano-electrospinning film used for sensor, trigger, driver, energy harvester, electronic, measurement, military, transportation, information engineering or geological exploration fields. ADVANTAGE - The film can be cut into different sizes or complex shapes, and has good flexibility and low density. The method can promote the formation of more polar beta -crystal forms by polyvinylidene fluoride through interfacial induction, improves piezoelectric properties of the film, and has simple and easy process. DETAILED DESCRIPTION - Preparation amino graphene/polyvinylidene fluoride piezoelectric nano-electrospinning film comprises: (A) dispersing 1 g graphene oxide in mixed solvent of 190-198 mL absolute ethanol and 2-10 mL water, adding 0.1-0.2 g triethoxyaminosilane, sonicating for 30 minutes, stirring at 50-60 degrees C for 24 hours, filtering to obtain amino-modified graphene oxide, washing with distilled water for 5-6 times, and vacuum-drying to 60 degrees C for 24 hours; (B) dispersing 1 g amino-modified graphene oxide in 90-100 mL distilled water, ultrasonically dispersing for 30 minutes, adding 8-10 g sodium borohydride, heating to 90 degrees C for 24 hours, filtering to obtain amino graphene, washing with distilled water for 5-6 times, and vacuum-drying to 60 degrees C for 24 hours; and (C) adding N,N-dimethylformamide, acetone and polyvinylidene fluoride at mass ratio of 0.001-0.01:4-7:1.5-3:1-1.5, stirring to 65-75 degrees C for 2 hours to obtain electrospinning solution, and electrospinning at negative voltage of - 1 kV to - 2 kV, positive voltage of + 10 kV top + 14 kV, receiving distance of 13-15 cm, translation distance of 80-100 mm, and pump speed of 0.05-0.06 mm/minute.