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Preparation method of insulation medium with improved energy density

A technology of insulating medium and energy storage density, applied in insulators, electrical components, circuits, etc., can solve problems such as no one in the research field, and achieve the effect of improving energy storage density, low process difficulty, and strong operability

Active Publication Date: 2020-03-27
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the arrangement of the chain segments in the copolymer will also have an important impact on the macroscopic properties of the material, the research field of improving the dielectric response characteristics, trap parameters and energy storage density of the copolymer by changing the arrangement of the chain segments has not been involved.

Method used

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  • Preparation method of insulation medium with improved energy density
  • Preparation method of insulation medium with improved energy density
  • Preparation method of insulation medium with improved energy density

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preparation example Construction

[0025] A kind of insulating medium preparation method that improves energy storage density of the present invention, comprises the following steps:

[0026] 1) 1,4-phenylenediisothiocyanate is completely dissolved in a polar solvent, then 1,3-cyclohexanediamine is added, and reacted for 3-6 hours under nitrogen environment and room temperature to obtain amino-terminated poly Thiourea precursor.

[0027] Wherein, the ratio of 1,4-phenylene diisothiocyanate to polar solvent is 0.96mmol:1-4mL.

[0028] The total substance amount of pyromellitic dianhydride and 1,4-phenylene diisothiocyanate and the total substance amount of 1,3-cyclohexanediamine and 4,4'-diaminodiphenyl ether same.

[0029] The amount ratio of 1,4-benzenediisothiocyanate to 1,3-cyclohexanediamine was 0.96:1.

[0030] The amount ratio of 4,4'-diaminodiphenyl ether to pyromellitic dianhydride was 0.96:1.

[0031] The polar solvent is N,N-dimethylacetamide (DMAc) or N,N-dimethylformamide (DMF).

[0032] 2) Add...

Embodiment 1

[0036] see figure 2 , a method for preparing an insulating medium for increasing energy storage density, comprising the following steps;

[0037] 1) Dissolve 0.96mmol 1,4-benzenediisothiocyanate completely in 2mL N,N-dimethylacetamide (DMAc), add 1mmol 1,3-cyclohexanediamine to the above solution, and The reaction was carried out under ambient and room temperature conditions for 6 hours to obtain an amino-terminated polythiourea precursor.

[0038] 2) Prepare the amino-terminated polythiourea precursor according to step 1), add 0.96mmol 4,4'-diaminodiphenyl ether and 1mmol pyromellitic dianhydride to the reaction solution in sequence, and make it under nitrogen environment and room temperature After reacting for 18 hours, a random copolymer (PTU-r-PAA) solution of polythiourea and polyamic acid was obtained.

[0039] 3) Spread the random copolymer PTU-r-PAA solution on a clean copper plate by casting method, and use a gradient temperature rise (70°C, 3 hours; 100°C, 1 hour;...

Embodiment 2

[0064] A method for preparing an insulating medium for increasing energy storage density, comprising the following steps;

[0065] 1) Dissolve 0.96mmol 1,4-benzenediisothiocyanate completely in 1mL N,N-dimethylacetamide (DMAc), add 1mmol 1,3-cyclohexanediamine to the above solution, and The reaction was carried out for 3 hours under ambient and room temperature conditions to obtain an amino-terminated polythiourea precursor.

[0066] 2) Prepare the amino-terminated polythiourea precursor according to step 1), add 0.96mmol 4,4'-diaminodiphenyl ether and 1mmol pyromellitic dianhydride to the reaction solution in sequence, and react under nitrogen environment and room temperature After 18 hours, a random copolymer (PTU-r-PAA) solution of polythiourea and polyamic acid was obtained.

[0067] 3) Spread the random copolymer PTU-r-PAA solution on a clean copper plate by casting method, and use a gradient temperature rise (70°C, 3 hours; 100°C, 1 hour; 120°C, 1 hour; 150°C , 3 hours...

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Abstract

The invention discloses a preparation method of an insulation medium with an improved energy density. The preparation method comprises following steps: dissolving 1,4-phenylene diisothiocyanate into apolar solvent, then adding organic diamine, carrying out reactions for 3 to 6 hours at a room temperature in a nitrogen atmosphere, then adding 4,4'-diaminodiphenyl ether and pyromellitic dianhydride, carrying out reactions for 12 to 18 hours at a room temperature in a nitrogen atmosphere to obtain a polythiourea-polyamide acid random copolymer solution; then paving the polythiourea-polyamide acid random copolymer solution on a copper plate, and heating the copper plate in a gradient mode to obtain a polythiourea-polyamide acid random copolymer. The arrangement mode of polyimide monomers in the copolymer molecular chains is changed to change the dielectric response feature and trap parameters of the insulation medium so as to control the dielectric constant and breakdown field strength, finally the energy density of the insulation medium is controlled or improved; and the insulation medium can be wildly used in many fields: high voltage energy storage devices, pulse power source, aeronautics and astronautics, hybrid vehicles, and the like.

Description

technical field [0001] The invention belongs to the field of high-voltage insulating materials, and in particular relates to a preparation method of an insulating medium for improving energy storage density. Background technique [0002] Because of its high power density and long cycle life, polymer film energy storage capacitors can convert intermittent renewable energy such as wind energy and tidal energy with maximum efficiency. Alternative core energy storage devices have also been widely used in aerospace, hybrid vehicles and other fields. However, due to the low dielectric constant or breakdown field strength of most polymers, their ability to store electrical energy is limited. For a long time, scholars at home and abroad mainly use nano-doping to improve the dielectric energy storage performance of thin films, but the introduction of high volume fraction nano-fillers will increase the energy loss of materials. Therefore, it is of great significance for practical en...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08G73/10
CPCC08J5/18C08G73/1071C08G73/1042C08G73/1007C08J2379/08C08G18/0852C08G18/7614H01B3/302H01B3/306H01B19/02C08G18/3234C08G18/3819
Inventor 冯阳杨安琪李盛涛杨柳青
Owner XI AN JIAOTONG UNIV
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