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Conductive particle filled polymer layered composite dielectric material and preparation method thereof

A filling polymer, layered composite technology, applied in the field of dielectric materials, can solve the problems of unfavorable high dielectric, uniform dispersion of chemical coating on the surface, sensitive filler content range, etc., to achieve high dielectric constant, promote Interfacial polarization, the effect of reducing conductivity loss

Active Publication Date: 2021-06-01
JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is still sensitive to the thickness of the surface chemical coating layer, the uniformity of filler dispersion, and the range of filler content, which is not conducive to the preparation of continuous and stable high dielectric and low loss materials.

Method used

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  • Conductive particle filled polymer layered composite dielectric material and preparation method thereof
  • Conductive particle filled polymer layered composite dielectric material and preparation method thereof
  • Conductive particle filled polymer layered composite dielectric material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A polymer multilayer composite dielectric material filled with conductive particles, consisting of polyvinylidene fluoride (PVDF) resin, multi-walled carbon nanotubes (Pristine CNT) and polydopamine-coated modified carbon nanotubes (PDA@CNT) , its multi-layer structure is an A / B / A / B multi-layer structure in which conductive layers (A) / dielectric layers (B) are alternately compounded. The total number of layers is 4 layers, the total thickness is 0.8mm, and the thickness of a single layer is 0.2mm.

[0039] Wherein the conductive layer is a blend of polyvinylidene fluoride (PVDF) / multi-walled carbon nanotubes (Pristine CNT), and its raw material composition mass ratio is:

[0040] Polyvinylidene fluoride (PVDF) 99.8%

[0041] Multi-walled carbon nanotubes (Pristine CNT) 0.2%

[0042] The dielectric layer is a blend of polyvinylidene fluoride (PVDF) / polydopamine surface-coated modified carbon nanotubes (PDA@CNT), and its raw material composition mass ratio is:

[0043]...

Embodiment 2

[0050] A polymer multilayer composite dielectric material filled with conductive particles, consisting of polyvinylidene fluoride (PVDF) resin, multi-walled carbon nanotubes (Pristine CNT) and polydopamine-coated modified carbon nanotubes (PDA@CNT) , is characterized in that, its multi-layer structure is the A / B / A / B multi-layer structure of conducting layer (A) / dielectric layer (B) alternate compounding, and its total number of layers is 4 layers, and total thickness is 0.8mm, The single layer thickness is 0.2mm.

[0051] Wherein the conductive layer is a blend of polyvinylidene fluoride (PVDF) / multi-walled carbon nanotubes (Pristine CNT), and its raw material composition mass ratio is:

[0052] Polyvinylidene fluoride (PVDF) 99.8%

[0053] Multi-walled carbon nanotubes (Pristine CNT) 0.2%

[0054] The dielectric layer is a blend of polyvinylidene fluoride (PVDF) / polydopamine surface-coated modified carbon nanotubes (PDA@CNT), and its raw material composition mass ratio is: ...

Embodiment 3

[0062] A conductive particle-filled polymer multilayer composite dielectric material, which is composed of polyvinylidene fluoride (PVDF) resin and polydopamine surface-coated modified carbon nanotubes (PDA@CNT), and its multilayer structure is a conductive layer (A ) / dielectric layer (B) alternate composite A / B / A / B multilayer structure, the total number of layers is 4 layers, the total thickness is 0.8mm, and the single layer thickness is 0.2mm.

[0063] The conductive layer and the dielectric layer in the multilayer composite dielectric material are blends of polyvinylidene fluoride (PVDF) / polydopamine surface-coated modified carbon nanotubes (PDA@CNT), and the mass ratio of the raw materials is:

[0064] Polyvinylidene fluoride (PVDF) 99.8%

[0065] Polydopamine-coated modified carbon nanotubes (PDA@CNT) 0.2%

[0066] Polydopamine surface-coated modified carbon nanotubes (PDA@CNT) are prepared by the preparation method of polydopamine surface-coated carbon nanotubes, where...

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Abstract

The invention discloses a conductive particle filled polymer layered composite dielectric material which comprises the following components in percentage by mass: 99.8% of polyvinylidene fluoride resin, 0-0.1% of multi-walled carbon nanotubes and 0.1-0.2% of polydopamine surface modified coated carbon nanotubes. The invention also provides a preparation method of the polydopamine surface modified coated carbon nanotubes and a preparation method of the conductive particle filled polymer layered composite dielectric material. According to the conductive particle filled polymer layered composite dielectric material, surface small organic molecule coating modification and layered physical distribution control in the prior art are combined, the interface polarization effect is promoted, meanwhile, formation of a conductive path in the vertical direction can be remarkably inhibited, and the conductivity loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of dielectric materials, and in particular relates to a polymer layered composite dielectric material filled with conductive particles and a preparation method thereof. Background technique [0002] High dielectric materials can store a large amount of charge in an electric field, and their energy storage characteristics determine that short-term and rapid charge storage and release can be realized. Therefore, there is a huge market demand and development in the field of charge storage materials and electronic components. prospect. In addition to the electronics industry, high dielectric materials are also widely used in military and civilian fields that require higher power density, including active vibration control, aerospace, underwater navigation and monitoring, hydrophones, biomedical imaging, nondestructive testing, and air imaging loudspeaker Weapons and Electromagnetic Launch Weapon Systems, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/10C08K3/04
CPCC08K9/10C08K3/041C08K2201/011C08K2201/003C08K2201/004C08L27/16
Inventor 朱家铭沈佳斌郭少云
Owner JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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