A polymer-based piezoelectric film and its preparation method and application

A polymer, based piezoelectric technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, chemical instruments and methods, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the shortage of piezoelectric performance And other issues

Active Publication Date: 2021-05-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a polymer-based piezoelectric film, which solves the problem of insufficient piezoelectric performance of traditional polymer-based materials, and has excellent piezoelectric performance and lower cost; the present invention also provides A kind of preparation method and application of polymer-based piezoelectric film

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  • A polymer-based piezoelectric film and its preparation method and application
  • A polymer-based piezoelectric film and its preparation method and application
  • A polymer-based piezoelectric film and its preparation method and application

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preparation example Construction

[0038] The present invention also provides a method for preparing the polymer-based piezoelectric film described in the above technical solution, comprising the following steps:

[0039] Mix the polymer with the two-dimensional layered structure compound to obtain the spinning slurry;

[0040] The spinning slurry is subjected to electrospinning and first hot pressing in sequence to obtain an initial film;

[0041] The initial film is sequentially laminated, second hot pressed and rolled to obtain the polymer-based piezoelectric film.

[0042] In the present invention, unless otherwise specified, each component is a commercially available product well known to those skilled in the art.

[0043] In the invention, the polymer is mixed with a two-dimensional layer structure compound to obtain a spinning slurry.

[0044] In the present invention, the polymer is preferably added in the form of a polymer solution. In the present invention, the solvent of the polymer solution is pr...

Embodiment 1

[0058] Add 1.4g of PVDF into 6g of DMF solvent, heat and stir in a magnetic stirring heater at 65°C for 6h to obtain a polyvinylidene fluoride solution;

[0059] 0.0056g of Ti 3 C 2 Add the nanosheets into 6g of DMF solvent, and ultrasonically disperse to obtain MXene solution;

[0060] Using an ultrasonic cleaning machine to ultrasonically mix the obtained polyvinylidene fluoride solution and MXene solution for 1 hour to obtain a preparation;

[0061] The obtained preparation is injected into the syringe, the pushing speed is set at 1.0mL / h, the voltage is 15kV, the humidity is controlled at 35%, the distance between the needle of the syringe and the receiving drum is 12cm, and the rotating speed of the receiving drum is 500rpm to obtain fibers; The first hot pressing is carried out under the conditions of 40MPa pressure and 300°C temperature to obtain an initial film with a thickness of 17 μm;

[0062] Laminate the initial films obtained from the three layers together, an...

Embodiment 2

[0080] Add 1.6g of PVDF into 6g of DMF solvent, heat and stir in a magnetic stirring heater at 65°C for 6h to obtain a polyvinylidene fluoride solution;

[0081] 0.0064g of Ti 3 C 2 Add the nanosheets into 6g of DMF solvent, and ultrasonically disperse to obtain MXene solution;

[0082] Using an ultrasonic cleaning machine to ultrasonically mix the obtained polyvinylidene fluoride solution and MXene solution for 1 hour to obtain a preparation;

[0083] The resulting preparation is injected into the syringe, set the push speed to 1.0mL / h, the voltage to 16kV, and the humidity to be controlled at 35%. The distance between the needle of the syringe and the receiving drum is 16cm, and the rotating speed of the receiving drum is 500rpm to obtain fibers; The first hot pressing is carried out under the conditions of 38MPa pressure and 250°C temperature to obtain an initial film with a thickness of 21 μm;

[0084] Laminate the initial films obtained from the three layers together, ...

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Abstract

The invention belongs to the technical field of piezoelectric materials, and in particular relates to a polymer-based piezoelectric film and its preparation method and application. The polymer-based piezoelectric film provided by the invention includes a polymer and a doped two-dimensional layered structure compound; the mass ratio of the polymer to the two-dimensional layered structure compound is 100: (0.1-2); the The polymer is one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene and polyvinylidene fluoride-trifluoroethylene; the chemical composition of the two-dimensional layered structure compound is M n+1 x n T y , wherein n=1, 2 or 3, M is a transition metal element, T is -O, -OH or -F functional group, and X is carbon or nitrogen. The polymer-based piezoelectric film provided by the present invention solves the problem of insufficient piezoelectric properties of traditional PVDF materials. Experimental results show that the polymer-based piezoelectric film provided by the present invention has good flexibility and excellent ferroelectric and piezoelectric properties. .

Description

technical field [0001] The invention belongs to the technical field of piezoelectric materials, in particular to a polymer-based piezoelectric film and its preparation method and application. 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. How to improve the piezoelectric properties of PVDF-based polymer materials and realize its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/14C08K3/28C08J5/18H01L41/18H01L41/193H01L41/37H01L41/45B32B27/06B32B27/32B32B27/20B32B33/00B32B37/06B32B37/10
CPCC08J5/18B32B27/08B32B27/322B32B27/20B32B33/00B32B37/06B32B37/10C08J2327/16C08K3/14C08K2201/011C08K3/28B32B2250/242B32B2307/20H10N30/852H10N30/857H10N30/092H10N30/098
Inventor 裘进浩赵秋莹杨路季宏丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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