Sandwich-structure flexible piezoelectric composite film and preparation method and application thereof
A composite film, flexible piezoelectric technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, material selection for piezoelectric devices or electrostrictive devices and other directions, it can solve problems such as fracture failure and limited flexibility applications, and achieve the effects of low cost, high repeatability, and easy control of the process
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Embodiment 1
[0036] (1) Dissolve 0.06g of polyvinylidene fluoride (PVDF) in 0.6mL of N,N-dimethylformamide (DMF) to obtain a 10wt% PVDF solution, and drop 0.6mL of the solution onto a glass substrate with a pipette , placed in a vacuum oven at 80°C for 12 hours and at 160°C for 6 hours to obtain PVDF films;
[0037] (2) Under the room temperature environment, take 3.0g of barium titanate nanoparticles into deionized water, ultrasonically vibrate for 1 hour to make it evenly dispersed; add 3.0g of dopamine hydrochloride powder to the system, and turn on magnetic stirring; Methane powder was slowly added to the obtained suspension, and the pH value was controlled to be ~8.5; then the above solution was magnetically stirred for 24 hours, allowed to stand for 1 night, the upper layer of yellow-brown solution was removed with a plastic tip dropper, and then washed with deionized water at least 3 times. The product was dried in an oven at 80 °C for 24 hours, and finally BTO@PDA nanoparticles wer...
Embodiment 2
[0045] (1) Dissolve 0.06g of polyvinylidene fluoride (PVDF) in 0.6mL of N,N-dimethylformamide (DMF) to obtain a 10wt% PVDF solution, and drop 0.6mL of the solution onto a glass substrate with a pipette , placed in a vacuum oven at 80°C for 12 hours and at 160°C for 6 hours to obtain PVDF films;
[0046](2) Under the room temperature environment, take 3.0g of barium titanate nanoparticles into deionized water, ultrasonically vibrate for 1 hour to make it evenly dispersed; add 3.0g of dopamine hydrochloride powder to the system, and turn on magnetic stirring; Methane powder was slowly added to the obtained suspension, and the pH value was controlled to be ~8.5; then the above solution was magnetically stirred for 24 hours, allowed to stand for 1 night, the upper layer of yellow-brown solution was removed with a plastic tip dropper, and then washed with deionized water at least 3 times. The product was dried in an oven at 80 °C for 24 hours, and finally BTO@PDA nanoparticles were...
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