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Polyvinylidene fluoride composite piezoelectric thin film, and preparation method and application thereof

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 the problems of insufficient piezoelectric performance and low cost, and achieve the effect of simple cubic structure, excellent ferroelectric performance, and increased piezoelectric constant

Active Publication Date: 2020-02-07
裘天政 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Polyvinylidene fluoride composite piezoelectric thin film, and preparation method and application thereof
  • Polyvinylidene fluoride composite piezoelectric thin film, and preparation method and application thereof
  • Polyvinylidene fluoride composite piezoelectric thin film, and preparation method and application thereof

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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 thin film, and a preparation method and application thereof. The provided polyvinylidene fluoride composite piezoelectric thin film includes polyvinylidene fluoride and a prussian blue analog, the prussian blue analog is Co3[Co(CN)6]2. According tothe provided polyvinylidene fluoride composite piezoelectric thin film, the problem of insufficient piezoelectric property of a traditional PVDF material is solved, and excellent piezoelectric properties and low cost are achieved; experimental results show that the provided polyvinylidene fluoride composite piezoelectric thin film has good flexibility, compared with a pure PVDF material, the residual polarization intensity is increased significantly, polarization is more sufficient, and more excellent ferroelectric properties are shown; and compared with the pure PVDF material, the piezoelectric constant d33 is significantly increased, and excellent piezoelectric properties are shown.

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 Applications(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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