Preparation method of fullerene-modified polyetherimide polymer material

Abstract

A method for preparing a fullerene-modified polyetherimide polymer material, the preparation raw materials include fullerene-based small molecules, polyetherimide, and N-methylpyrrolidone solution, and the preparation step includes a mixing step, Drying step and peeling step, the mixing step, drying step and peeling step are carried out in sequence, the mixing step is to obtain a composite suspension, and the drying step uses the composite suspension to obtain a composite wet film, and then removes The volume in the composite wet film yields a composite film, and the peeling step peels off the 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 polyetherimide 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 performance, ...

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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. There are two main problems: one is that the conductance loss of polyetherimide increases with the electric field strength under high temperature conditions and a sharp rise, leading to a sharp drop in energy storage density

The second is that the breakdown field strength of imine is not high, so it cannot adapt to a higher working voltage environment

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