Fluorine-containing polymer/conductive fiber dielectric material and preparation method thereof

A technology of conductive fibers and dielectric materials, applied in fiber types, fiber processing, textiles and papermaking, etc., can solve problems that affect the practical application of polymer-based dielectric composite materials, accelerate dielectric thermal decomposition and aging, and reduce insulation performance , to achieve a wide range of use, increase the dielectric constant, and increase the effect of dielectric loss

Active Publication Date: 2016-07-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the compatibility of inorganic conductive fillers with organic polymers is generally poor, which leads to problems such as high dielectric constant and high dielectric loss in the composite materials usually obtained by the above method, which are easy to accelerate the dielectric loss. Thermal decomposition and aging greatly reduce its insulating properties, thereby affecting the practical application of polymer-based dielectric composites

Method used

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  • Fluorine-containing polymer/conductive fiber dielectric material and preparation method thereof
  • Fluorine-containing polymer/conductive fiber dielectric material and preparation method thereof
  • Fluorine-containing polymer/conductive fiber dielectric material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038]Take a 2m long PA66 fiber and soak it in ethanol solvent for 20-30min, then take it out and wash it with distilled water, then put it in a vacuum drying oven to dry for use. Weigh 1.215g of Tris, dissolve it in an appropriate amount of distilled water, stir with a glass rod until completely dissolved, then add 1.47ml of 2g / L HCl solution to adjust the pH to 8.5 to obtain a Tris-HCl solution with a pH of 8.5. 0.4 g of dopamine was weighed and added to the Tris-HCl solution configured above to obtain a 2 g / L dopamine solution. Then add PA66 fiber to soak for 3 minutes, then take it out and react in air for 2 minutes, pull it repeatedly 15 times, wash with deionized water and dry to obtain polydopamine-coated PA66 fiber, cut into pieces, length 0.1-5cm, and set aside.

[0039] Prepare a silver nitrate solution with a concentration of 20 g / L, and gradually add ammonia water until the precipitate completely disappears to obtain the corresponding silver ammonia solution. Imme...

Embodiment 2

[0043] Take a 2.5m long PA66 / PET composite fiber and soak it in ethanol solvent for 20-30min, then take it out and wash it with distilled water, then put it in a vacuum drying oven to dry for use. Weigh 1.224g of Tris and dissolve it in an appropriate amount of distilled water, stir it with a glass rod until it is completely dissolved, then add 1.51ml of 2g / L HCl solution to adjust the pH to 8. 0.4 g of dopamine was weighed and added to the Tris-HCl solution configured above to obtain a 1 g / L dopamine solution. Then add PA66 fiber to soak for 5 minutes, then take it out and react in the air for 3 minutes, repeat pulling 9 times, wash with deionized water and dry to obtain polydopamine-coated PA66 / PET composite fiber, cut into pieces, length 0.1-5cm, and set aside.

[0044] Prepare a silver nitrate solution with a concentration of 30 g / L, and gradually add ammonia water until the precipitate completely disappears to obtain the corresponding silver ammonia solution. Immerse the...

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Abstract

The invention relates to a fluorine-containing polymer / conductive fiber dielectric material and a preparation method thereof.The fluorine-containing polymer / conductive fiber dielectric material is formed by mixing conductive fiber and a fluorine-containing polymer cPVDF material.The conductive fiber is polymer fiber with the surface coated with silver.The preparation method of the conductive fiber comprises the steps that the polymer fiber is placed in a dopamine alkaline aqueous solution to be soaked for a period of time, then taken out to react in air for a period of time, subjected to the soaking-autopolymerization reaction repeatedly and repeatedly lifted and pulled, washed with deionized water and dried to obtain the polydopamine modified fiber; the surface of the polydopamine modified fiber is coated with a layer of silver through a chemical silvering method; finally, the obtained fiber is thoroughly washed with distilled water, and dried in a vacuum drying box to obtain the conductive fiber.The conductive fiber is used as a filler and mixed with fluorine-containing polymer cPVDF; due to the fact that the surface layer of the conductive fiber is the conductive material, the dielectric constant of the composite material can be improved, dielectric loss will not be greatly increased when the dielectric constant is increased, the dielectric property is excellent, and the using range is wide.

Description

technical field [0001] The invention relates to a polymer / conductive fiber composite material with excellent dielectric properties prepared by chemical silver plating and polymer molding processing technology, and the technology can be used to prepare flexible films, wires and sheets. Background technique [0002] With the urgent need for miniaturization and functional diversification of devices in modern life and technological progress, it is imperative to develop integrated, light-weight, high-stability materials with high energy storage density. As a very important energy storage material, capacitor has the function of storing charge, and is widely used in various fields such as electronic information, digital home appliances, and aerospace. The dielectric material is an important part of the capacitor, and the performance of the dielectric material determines the energy storage capacity of the capacitor to a large extent. [0003] Traditional dielectric materials includ...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L77/06C08K3/08D06M11/83D06M15/61D06M101/34
CPCC08J5/18C08J2327/16C08J2477/06C08K2201/001C08L27/16C08L2203/16C08L2205/16D06M11/83D06M15/61D06M2101/34C08L77/06C08K2003/0806
Inventor 董丽杰胡尉博冯锐张扬李立李泽宇
Owner WUHAN UNIV OF TECH
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