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A kind of polyvinylidene fluoride composite piezoelectric film and its preparation method and application

A polyvinylidene fluoride, piezoelectric thin film technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, for piezoelectric devices or electrostrictive devices Material selection and other directions can solve problems such as insufficient piezoelectric performance and low cost

Active Publication Date: 2021-07-23
裘天政 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a polyvinylidene fluoride composite piezoelectric film, which solves the problem of insufficient piezoelectric performance of traditional PVDF materials, has excellent piezoelectric performance and lower cost; the present invention also provides Preparation method and application of a polyvinylidene fluoride composite piezoelectric film

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  • A kind of polyvinylidene fluoride composite piezoelectric film and its preparation method and application
  • A kind of polyvinylidene fluoride composite piezoelectric film and its preparation method and application
  • A kind of polyvinylidene fluoride composite piezoelectric film and its preparation method and application

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preparation example Construction

[0029] The present invention also provides a preparation method of the polyvinylidene fluoride composite piezoelectric film described in the above technical solution, comprising the following steps:

[0030] Mixing polyvinylidene fluoride with a Prussian blue analogue to obtain a preparation;

[0031] Film-forming and rolling are performed sequentially on the prepared material to obtain the polyvinylidene fluoride composite piezoelectric film.

[0032] In the present invention, unless otherwise specified, each component is a commercially available product well known to those skilled in the art.

[0033] The invention mixes the polyvinylidene fluoride and the Prussian blue analog to obtain the preparation.

[0034] In the present invention, the polyvinylidene fluoride is preferably added in the form of a polyvinylidene fluoride solution. In the present invention, the solvent of the polyvinylidene fluoride solution is preferably N,N-dimethylformamide (DMF) and / or dimethylsulfo...

Embodiment 1

[0048] Add 1g of PVDF into 5g of DMF solvent, heat and stir in a magnetic stirring heater at 65°C for 6h to obtain a polyvinylidene fluoride solution;

[0049] 0.004g of PBAs powder was added to 5g of DMF solvent, and ultrasonically dispersed to obtain a Prussian blue analogue solution;

[0050] Using an ultrasonic cleaner to ultrasonically mix the obtained polyvinylidene fluoride solution and the Prussian blue analogue solution for 1 hour to obtain the preparation;

[0051] Slowly drop the prepared material on a horizontal glass plate at a rate of 4 mL / min, let it stand for 4 minutes after the addition, vacuumize to remove air bubbles, and then treat it in a vacuum oven with a vacuum degree of 0.09MPa and 80°C for 12 hours to obtain A primary crystal film with a thickness of 30 μm;

[0052] The rolling mill was turned on and heated, and the temperature was set at 80°C. After the temperature stabilized, the obtained primary crystal film was rolled to obtain a polyvinylidene f...

Embodiment 2

[0068] Add 0.8g of PVDF into 5g of DMF solvent, heat and stir in a magnetic stirring heater at 65°C for 6h to obtain a polyvinylidene fluoride solution;

[0069] Add 0.0032 g of PBAs powder into 5 g of DMF solvent, and ultrasonically disperse to obtain a Prussian blue analogue solution;

[0070] Using an ultrasonic cleaner to ultrasonically mix the obtained polyvinylidene fluoride solution and the Prussian blue analogue solution for 1 hour to obtain the preparation;

[0071] Slowly drop the prepared material on a horizontal glass plate at a rate of 4 mL / min, let it stand for 4 minutes after the addition, vacuumize to remove air bubbles, and then treat it in a vacuum oven with a vacuum degree of 0.09MPa and 80°C for 12 hours to obtain A primary crystal film with a thickness of 25 μm;

[0072] The rolling mill was turned on and heated, and the temperature was set at 80°C. After the temperature stabilized, the obtained primary crystal film was rolled to obtain a polyvinylidene f...

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Abstract

The invention belongs to the technical field of piezoelectric materials, and particularly relates to a polyvinylidene fluoride composite piezoelectric film and a preparation method and application thereof. The polyvinylidene fluoride composite piezoelectric film provided by the present invention includes polyvinylidene fluoride and Prussian blue analogs; the Prussian blue analogs are Co 3 [Co(CN) 6 ] 2 . The invention provides a polyvinylidene fluoride composite piezoelectric film, which solves the problem of insufficient piezoelectric performance of traditional PVDF materials, and has excellent piezoelectric performance and low cost. The experimental results show that the polyvinylidene fluoride composite piezoelectric film provided by the present invention has good flexibility, and compared with pure PVDF material, the remanent polarization is significantly increased, the polarization is more sufficient, and the ferroelectric performance is more excellent; Compared with pure PVDF material, the piezoelectric constant d 33 significantly increased, showing excellent piezoelectric properties.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric materials, and in particular relates to a polyvinylidene fluoride composite piezoelectric film and a preparation method and application thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) is currently the only commercial piezoelectric polymer material, which has the advantages of good piezoelectricity, good linearity, wide frequency band, strong time stability, low price, wear resistance and light weight, and has similar The softness of human skin and the good biocompatibility of the human body have extremely broad applications in the fields of flexible sensors and transducers. However, limited by the lower piezoelectric gauge factor of PVDF (such as d 33 , d 31 ) level, the performance of electronic devices such as PVDF sensors is still at a low level, which restricts its application range in modern high-tech fields. Therefore, how to improve the piezoelectric performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/28C08J5/18H01L41/18H01L41/193H01L41/37H01L41/45H10N30/092H10N30/098H10N30/85H10N30/857
CPCC08J5/18C08J2327/16C08K3/28H10N30/852H10N30/857H10N30/092H10N30/098
Inventor 裘天政杨路赵秋莹
Owner 裘天政
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