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Insulating material capable of automatically restoring electric breakdown damage and preparation method thereof

An insulating material and automatic repair technology, which is applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems of low resistance, loss of insulation performance, and breakdown of polyolefin microporous films, and achieve the goal of restoring insulation strength Effect

Active Publication Date: 2018-03-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional insulating materials such as polyolefin polyethylene and polypropylene-based polyolefins are widely used, mainly because polyethylene and polypropylene microporous films have higher porosity, higher tear strength, and better resistance to corrosion. Acid-base capability, but due to the low resistance of polyolefin microporous membrane, it often loses its insulation performance due to breakdown during use

Method used

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  • Insulating material capable of automatically restoring electric breakdown damage and preparation method thereof
  • Insulating material capable of automatically restoring electric breakdown damage and preparation method thereof
  • Insulating material capable of automatically restoring electric breakdown damage and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the synthesis example of supramolecular polymer

[0021] 42.1g dimer acid (wherein dimer content is 80%, trimer content is 12%) and 17.3g diethylenetriamine (DETA), and the silicon dioxide (SiO2) that mass fraction is 1% 2 ) powder was added to a 150mL three-necked flask and stirred continuously for 12h at a speed of 1500rpm, and N was continuously introduced during the reaction. 2 . After the reaction, the reaction temperature was lowered to 130° C., 0.2 g of urea was added into the three-necked flask, and the stirring was continued at 1500 rpm for 30 min to obtain a self-healing polymer.

Embodiment 2

[0022] Embodiment 2: blend preparation example

[0023] First, prepare a polyolefin film with a thickness of about 20-50 microns and a through hole with a pore size of 10-100 microns in the thickness direction by biaxial stretching; In the through holes of the olefin film, the self-healing polymer remaining on the surface of the polyolefin film is carefully removed, and the composite insulating film is obtained after drying. The resulting insulating film composite structure is as figure 2 shown.

Embodiment 3

[0024] Embodiment 3: Example of Dielectric Strength Test

[0025] This embodiment is a method for testing the insulation performance of the composite film. The insulation material prepared according to the test method of the present invention is subjected to a breakdown test, and the DC insulation strength of the material is tested by a withstand voltage tester, and the result shows that the insulation strength of the obtained composite insulation film is higher than 200MV / m.

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Abstract

The invention provides an insulating material capable of automatically restoring an electric breakdown damage. The insulating material is formed by blending a polyolefin insulating material and a supramolecular polymer based on multiple hydrogen bonds. The insulating material has a specific blend structure; meanwhile, the insulation intensity of the insulating material can restore to 90% of an initial insulation intensity in 1 minute of standing at a room temperature after generation of electric breakdown under a direct current insulation strength higher than 200 MV / m. The insulating materialprepared by using the preparation method provided by the invention has high insulation strength and can automatically restore the electric breakdown damage; and the insulating material can be appliedto insulating coatings of power electronic equipment, insulating layers of cables, etc.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to an insulating material capable of automatically repairing electric breakdown damage and a preparation method thereof. Background technique [0002] Insulating materials play an important role in electrical equipment, mainly isolating conductors with different potentials, serving as a support for conductors, and storing electrical energy. Its ability to adapt to the environment often determines the ability of electrical equipment to adapt to the environment. Under a strong electric field, insulating materials are prone to electrical breakdown due to performance differences, resulting in material performance failure, bringing hidden dangers to people's lives, and even affecting people's life safety. At present, there is no clear and effective method to repair the damage caused by electrical breakdown, so the research and development of insulating materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08J9/36H01B3/44C09D187/00C08L23/00C08L87/00B29C55/10B29L7/00
CPCB29C55/10B29L2007/00C08G83/008C08J9/36C08J2323/00C08J2487/00C08L23/00C08L2203/202C09D187/00H01B3/441C08L87/00
Inventor 王东瑞郭学娜张素美
Owner UNIV OF SCI & TECH BEIJING