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A PVDF-based composite material with sea-island structure and its preparation method

A technology of composite material and sea-island structure, which is applied in the field of PVDF-based composite material with sea-island structure and its preparation, can solve the problems of high dielectric constant and low dielectric loss, etc.

Active Publication Date: 2021-04-27
长春市联禹化学科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a PVDF-based composite material with a sea-island structure and a preparation method thereof in order to solve the problem that the existing composite material cannot satisfy the problem of high dielectric constant and low dielectric loss at the same time

Method used

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  • A PVDF-based composite material with sea-island structure and its preparation method
  • A PVDF-based composite material with sea-island structure and its preparation method
  • A PVDF-based composite material with sea-island structure and its preparation method

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preparation example Construction

[0025] The present invention also provides a method for preparing a PVDF-based composite material with a sea-island structure, the process schematic diagram of the composite material and the sea-island structure schematic diagram of the composite material are as follows figure 1 As shown, the method includes:

[0026] Step 1: Put polyvinylidene fluoride, ethylene-methyl acrylate-glycidyl methacrylate and carbon nanotubes into a torque rheometer for melt blending to obtain polyvinylidene fluoride / ethylene-methyl acrylate- Glycidyl methacrylate / carbon nanotube composite;

[0027] Step 2: Put the polyvinylidene fluoride / ethylene-methyl acrylate-glycidyl methacrylate / carbon nanotube composite in step 1 into a mold for hot pressing, and then transfer to a cold press for cold pressing until the mold is cooled Below the deformation temperature of PVDF, the PVDF-based composite material with sea-island structure is obtained by demoulding.

[0028] According to the present invention,...

Embodiment 1

[0034] Polyvinylidene fluoride, ethylene-methyl acrylate-glycidyl methacrylate and carbon nanotubes were put into a torque rheometer at a mass ratio of 88:10:2 for melt blending, and the blending temperature was 200°C. The rotor speed is 60 rpm, and the blending time is 5 minutes to obtain polyvinylidene fluoride / ethylene-methyl acrylate-glycidyl methacrylate / carbon nanotube composite;

[0035] Put the polyvinylidene fluoride / ethylene-methyl acrylate-glycidyl methacrylate / carbon nanotube composite in a mold, heat it to 200°C, press it under a pressure of 10MPa for 5 minutes, and keep it under pressure until The mold is cooled to below the PVDF deformation temperature for demoulding to obtain a composite material.

[0036] figure 2 It is the scanning electron microscope picture of the composite material that is made in embodiment 1; Wherein, (a) is the image when not adding carbon nanotube; (b) is the image when carbon nanotube mass fraction is 2wt%; (c), (d) corresponds to ...

Embodiment 2

[0039] The steps and conditions are the same as in Example 1, except that polyvinylidene fluoride, ethylene-methyl acrylate-glycidyl methacrylate and carbon nanotubes are added in a mass ratio of 89:10:1.

[0040] The obtained composite material permittivity and dielectric loss of embodiment 2 are obtained by alternating current impedance meter test, and its result is as follows image 3 As shown, the dielectric constant of the material is 22 at 1000 Hz, and the dielectric loss is 0.057 at this time.

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Abstract

The invention provides a PVDF-based composite material with a sea-island structure and a preparation method thereof, belonging to the field of composite material preparation. The composite material has a sea-island structure, which is obtained by melting and blending polyvinylidene fluoride, ethylene-methyl acrylate-glycidyl methacrylate and carbon nanotubes, then hot pressing and cold pressing, and demoulding . The invention also provides a preparation method of the PVDF-based composite material with a sea-island structure. The dielectric constant of the composite material of the invention is as high as 794, and the dielectric loss is only 0.81 at this time.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a PVDF-based composite material with a sea-island structure and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, people have put forward requirements for electronic products such as flexibility, light weight, intelligence, and portability. Embedding a large number of passive components inside the circuit board to achieve circuit board miniaturization is one of the solutions to achieve the above requirements. Capacitors, which are important energy storage components, are currently difficult to achieve a high degree of integration, mainly because they are limited by the matching high dielectric materials. However, traditional high-dielectric materials have been difficult to meet the requirements of advanced electronic technology due to factors such as harsh processing conditions and hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08L23/08C08K3/04
CPCC08K2201/001C08K2201/011C08L27/16C08L23/0884C08K3/041
Inventor 孙树林杨世美宋士新吕雪
Owner 长春市联禹化学科技有限公司
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