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Preparation method of fullerene-modified fluorene copolyester polymer material

A technology of polymer materials and fluorene copolyesters, which is applied in the field of preparation of fluorene copolyester polymer materials, can solve the problems of inability to adapt to the working voltage environment, low breakdown field strength of fluorene copolyesters, and decreased energy storage density. problem, to achieve the effect of suppressing carrier migration, increasing breakdown field strength, and reducing conductance loss

Active Publication Date: 2022-07-01
TSINGHUA UNIV
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Problems solved by technology

However, it is difficult for this material to meet the application requirements under the operating temperature of 150ºC and high temperature and strong electric field above 400MV / m. sharp rise, leading to a sharp drop in energy storage density
Second, the breakdown field strength of fluorene copolyester is not high, so it cannot adapt to a higher working voltage environment

Method used

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  • Preparation method of fullerene-modified fluorene copolyester polymer material
  • Preparation method of fullerene-modified fluorene copolyester polymer material
  • Preparation method of fullerene-modified fluorene copolyester polymer material

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings.

[0022] A method for preparing a fullerene-modified fluorene copolyester polymer material comprises dissolving fullerene-based small molecules and fluorene copolyester in an N-methylpyrrolidone solution respectively. After the fluorene copolyester solution was continuously stirred for 2 hours by magnetic stirring, the fullerene-based small molecule solution was added. Then, the mixed solution is ultrasonically stirred for 1 hour, and the ultrasonic power is 150W to obtain a composite suspension in which the fullerene-based small molecules are uniformly dispersed in the fluorene copolyester. A layer of composite wet film is prepared on the glass substrate by means of drop coating. The composite wet film was placed in a forced air oven, dried at 80ºC for 12 hours to remove the solvent, then dried at 125ºC and 150ºC for 1 hour, and finally at 200ºC for 12 hours. Transfer...

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Abstract

A preparation method of a fullerene-modified fluorene copolyester polymer material. The fullerene-based small molecule and the fluorene copolyester are respectively dissolved in an N-methylpyrrolidone solution, and the method is drop-coating, and the A layer of composite wet film is prepared on the glass substrate, and the composite wet film is placed in a blast oven to completely remove the remaining solvent in the material. Fullerene-based small molecule modified fluorene copolyester composite film. The beneficial effects are: reducing the conductivity loss of the polymer material, obtaining a polymer dielectric material with extremely high energy storage density, weakening the impact of electrons on the polymer molecular chain under a strong electric field, and greatly improving the breakdown field of the polymer material. Strong, easy to achieve large-scale industrial production.

Description

technical field [0001] The invention relates to the field of film capacitor preparation, in particular to a preparation method of a fullerene-modified fluorene copolyester polymer material. Background technique [0002] Dielectric capacitors are not only important basic electronic components due to their advantages of ultra-high power density, extremely low loss and higher operating voltage, but also play the main roles of bypass, decoupling, filtering and energy storage in circuits. At the same time, it is widely used in basic energy storage devices in electronic power systems, energy systems and advanced weapon systems. Dielectric capacitors can be divided into three categories: organic polymer dielectric capacitors, inorganic dielectric capacitors, and electrolytic capacitors according to the dielectric materials used. Among them, organic film capacitors, which use organic polymers as dielectric materials, have the characteristics of light weight, good processing perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L67/00C08K3/04
CPCC08J5/18C08J2367/00C08K3/045
Inventor 李琦何金良袁超周垚成桑梁家杰胡军
Owner TSINGHUA UNIV
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