▎ 摘　　要

NOVELTY - Preparing P(VDF-TrFE) tree-like micro-nano fiber piezoelectric film comprises (a) preparing P(VDF-TrFE) electrostatic spinning solution by dissolving 100 pts. wt. P(VDF-TrFE) in mixed solvent of 500-1000 pts. wt. acetone and N,N-dimethylformamide in stainless steel reactor, adding 1-15 pts. wt. organic branched salt and 0-0.5 pts. wt. nanoparticles respectively, stirring overnight at room temperature, stop stirring next day, sealing and storing and perform ultrasonic degassing before use, (b) preparing P(VDF-TrFE) tree-like micro-nano fiber piezoelectric film by carrying out in electrostatic spinning machine, placing in clean room with a constant temperature and humidity device, turning on high voltage power supply, adjusting high voltage to 10-30 kV, observing spinning situation and setting spinning time to 1-10 hours and using grounded safety rod to remove the residual static electricity and place it on an ultra-static workbench to air dry for use. USE - The piezoelectric film is useful in biomedicine, electronic skin, human-machine interface, human body activity monitoring, wear-resistant electronic device. ADVANTAGE - The method: has good mechanical properties and piezoelectric properties.