A kind of preparation method of insulating medium that improves energy storage density

A technology of insulating medium and energy storage density, which is applied in the direction of insulators, circuits, electrical components, etc., and can solve problems that have not been involved in the research field

Active Publication Date: 2020-10-27
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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  • A kind of preparation method of insulating medium that improves energy storage density
  • A kind of preparation method of insulating medium that improves energy storage density
  • A kind of preparation method of insulating medium that improves energy storage 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 insulating medium for improving energy storage density, which comprises dissolving 1,4-phenylene diisothiocyanate in a polar solvent, adding organic diamine, and reacting in a nitrogen environment and room temperature 3-6 hours, then add 4,4'-diaminodiphenyl ether and pyromellitic dianhydride, and react for 12-18 hours under nitrogen environment and room temperature to obtain random copolymerization of polythiourea and polyamic acid The compound solution; the random copolymer solution of polythiourea and polyamic acid is spread on a copper plate, and the temperature is raised by gradient to obtain a random copolymer of polythiourea and polyimide. The invention controls the dielectric constant and breakdown field strength by changing the arrangement of polyimide monomers in the copolymer molecular chain, thereby changing the dielectric response characteristics and trap parameters of the material, and finally controlling or improving the energy storage of the material Density, can be widely used in high-voltage energy storage equipment, pulse power sources, aerospace, hybrid vehicles and other fields.

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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Patent Type & Authority Patents(China)
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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