Preparation method of perylenetetracarboxylic diimide modified polyimide polymer material

A technology of perylene tetracarboximide and perylene tetracarboximide is applied in the field of preparation of polyimide polymer materials, which can solve the problem of decreased energy storage density, increased conductivity loss, and inability to adapt to the working voltage environment and other problems, to achieve the effect of easy large-scale industrial production and uniform dielectric properties

Inactive Publication Date: 2021-03-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Preparation method of perylenetetracarboxylic diimide modified polyimide polymer material
  • Preparation method of perylenetetracarboxylic diimide modified polyimide polymer material
  • Preparation method of perylenetetracarboxylic diimide modified polyimide polymer material

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Experimental program
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Example Embodiment

[0033] Example 1

[0034] In the case of suppressing conductance loss, especially in the high electric field, the local state density in the polymer medium is large, and the electron injection polymer is bonded in different local area energy levels, the conductance process is mainly due to electronics. At the local state migration, that is, the electronic use of jumping conductance is transitioned from a local area to another. After introduction of the tetramethyleneimide small molecule, since it has a very strong electron affinity, a deep trap can be formed inside the polymer material such as figure 1 As shown, these deep traps can effectively hinder the migration process of electrons in the local area, thereby suppressing loss of the internal jumping capacity of the polymer medium under high temperature and high electric fields.

Example Embodiment

[0035] Example 2

[0036] Schottky barrier curve of the metal electrode and the polymer media contact interface, figure 2 Indicated. The electrons emitted from one point in the metal electrode will induce corresponding positive charges in the electrode, which is subject to the mirror force generated by the induced electric charge electric field. Electrons are injected from metal electrodes into the polymer medium to subtract the electrical affinity of the polymer medium from the polymer medium. Under external electric fields, electrons will overcome mirroring force into the polymer medium from the metal electrode to the polymer medium, which makes the electron injection need to overcome the height of the barrier height. This patent uses semiconductor small molecules to construct an electron adsorption layer in an electrode-polymer interface, which can form a reverse electric field in the surface of the polymer after applying a voltage. image 3 As shown, the reverse electric fiel...

Example Embodiment

[0037] Example 3

[0038] In terms of improving the strong breakdown field, the tetramethyleneimide small molecule can capture high energy electrons, autoissions are excited and ionization conversion to form free radicals, and weaken the impact of electron with electron-to-polymer molecular chains under strong electric fields. Improve the striking field of polymer materials. 苝 苝 二 二 类 类 类 聚 聚 聚 强 分 强 分 分 分 分 分 分 分 分 强 Figure 7 As shown, its feature breakdown is about 491 mV / m.

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Abstract

The invention relates to a preparation method of a perylenetetracarboxylic diimide modified polyimide polymer material. The perylenetetracarboxylic diimide modified polyimide polymer material is prepared from perylenetetracarboxylic diimide small molecules, polyimide and an N-methyl pyrrolidone solution, and the preparation steps comprise a mixing step, a drip coating step, a drying step and a stripping step which are carried out in sequence. The invention has the beneficial effects that the conductivity loss of the polymer material is reduced, the impact of electrons on a polymer molecular chain under a strong electric field is weakened, the breakdown field intensity of the polymer material is greatly improved, and large-scale industrial production is easy to realize.

Description

technical field [0001] The invention relates to the field of film capacitor preparation, in particular to a method for preparing a perylenetetracarboximide modified polyimide polymer material. Background technique [0002] Due to the advantages of ultra-high power density, extremely low loss and higher operating voltage, dielectric capacitors are not only important basic electronic components, but also play a major role in bypassing, 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 cutting-edge weapon systems. According to the dielectric materials used, dielectric capacitors can be mainly divided into three categories: organic polymer dielectric capacitors, inorganic dielectric capacitors, and electrolytic capacitors. Among them, organic film capacitors, which use organic polymers as dielectric materials, have the characteristics of light weight, good pr...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08K5/3437
CPCC08J5/18C08J2379/08C08K5/3437
Inventor 李琦袁超何金良周垚成桑梁家杰胡军
Owner TSINGHUA UNIV
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