Piezoelectric polymer composite material and preparation method thereof

The invention provides a piezoelectric polymer composite material and a preparation method thereof. The preparation method comprises the following steps: (1) mixing nano-barium titanate, 3-aminopropyl trimethoxy silane, gamma-aminopropyl trimethoxy silane and ethyl acetate and stirring and reacting, filtering and cleaning, and drying in a drying oven; (2) cooling, mixing with lanthanum nitrate, neodymium nitrate, lauryl alcohol polyoxyethylene and sodium hydroxide, grinding in an agate mortar, adding deionized water and carrying out ultrasonic cleaning for 3-5 times; (3) drying in a thermostat; (4) taking out and adding acetone and stirring, adding hydantoin epoxy resin and polyvinylidene fluoride and continuously stirring at the temperature of 80-90 DEG C until acetone is completely volatilized; and (5) adding polydimethylsiloxane, polyethylene wax and stearic acid and stirring, and carrying out extrusion molding by a twin-screw extruder. The piezoelectric polymer composite material of the invention has good