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A kind of preparation method of modified epoxy composite material

A composite material and epoxy technology, which is applied in the field of high voltage and insulation, can solve the problems of low cross-linking degree, low glass transition temperature, and the overall performance is far apart. The effect of raising the glass transition temperature

Active Publication Date: 2022-02-01
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the special conditions of the laboratory, such as the preparation environment, equipment, and time cost, the currently prepared high-quality epoxy-based micro-composite dielectrics have poor particle dispersion, low cross-linking degree, and low glass transition temperature. Industrial actual production samples are far apart

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  • A kind of preparation method of modified epoxy composite material
  • A kind of preparation method of modified epoxy composite material
  • A kind of preparation method of modified epoxy composite material

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preparation example Construction

[0033] A preparation method of modified epoxy composite material, taking epoxy-based micro-alumina composite material as the research object, when preparing samples in the laboratory, by strictly controlling the temperature of the mixture, the vacuum degree in the container, and the amount of filler added Sequence and stirring time, etc., with the same time, the epoxy-based micro-composite sample with a higher glass transition temperature can be prepared.

[0034] Specifically, the following steps are included:

[0035] The raw materials include: 297g of micron aluminum oxide particles, and the mass ratio of epoxy resin to curing agent is 100:38. Taking the mass fraction of micron alumina particles as 297g, the mass of epoxy resin as 100g, and the curing agent as 38g as an example, prepare a sample containing 68.3% mass fraction of micron alumina particles. The specific steps are as follows:

[0036] 1) Weigh 500g of micron aluminum oxide particles, put them in an oven at 50°...

Embodiment 1

[0052]Prepare epoxy and epoxy-based micron-alumina composite materials, raw materials include: 297g micron-alumina particles, and the mass ratio of epoxy resin to curing agent is 100:38. Taking the mass fraction of micron alumina particles as 297g, the mass of epoxy resin as 100g, and the volume of curing agent as 38g as an example, prepare a sample containing 68.3% mass fraction of micron alumina particles. The specific steps are as follows:

[0053] 1) Weigh 500g of micron aluminum oxide particles, put them in an oven at 50°C and bake for more than 24 hours;

[0054] 2) Scrub the surface of the abrasive tool successively with absolute ethanol and deionized water, and then put the mold in an oven at 50°C to dry;

[0055] 3) After the mold is dry, take out the mold, spray the mold release agent evenly on the surface of the mold, and then put it in a 120°C oven to preheat for 2 hours;

[0056] 4) Put the solid bulk epoxy resin in a beaker, put it into a 120°C oven and heat it ...

Embodiment 2

[0078] Prepare epoxy and epoxy-based micron-alumina composite materials, raw materials include: 297g micron-alumina particles, and the mass ratio of epoxy resin to curing agent is 100:38. Taking the mass fraction of micron alumina particles as 297g, the mass of epoxy resin as 100g, and the volume of curing agent as 38g as an example, prepare a sample containing 68.3% mass fraction of micron alumina particles. The specific steps are as follows:

[0079] 1) Weigh 500g of micron aluminum oxide particles, put them in an oven at 50°C and bake for more than 24 hours;

[0080] 2) Scrub the surface of the abrasive tool successively with absolute ethanol and deionized water, and then put the mold in an oven at 50°C to dry;

[0081] 3) After the mold is dry, take out the mold, spray the mold release agent evenly on the surface of the mold, and then put it in a 120°C oven to preheat for 2 hours;

[0082] 4) Put the solid bulk epoxy resin in a beaker, put it into a 120°C oven and heat it...

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Abstract

The invention discloses a preparation method of a modified epoxy composite material. Taking epoxy-based micro-composite dielectric as the preparation object, by dividing the required micro-particles into three parts and adding them in three times according to the process, while strictly controlling physical quantities such as the stirring time during sample preparation, the air pressure and temperature in the flask, and mixing all the particles once In the same sample preparation time, an epoxy-based micro-composite sample with a higher glass transition temperature can be prepared. Compared with the one-time addition of micron particles, when the particles are micron alumina particles and the particle mass fraction is 68.3%, the glass transition temperature of the prepared sample is increased by more than 10%. The invention can prepare high-quality micron composite dielectrics for laboratories with excellent performance in a short time, and can be popularized and applied in the preparation of thermosetting and high-quality micron composite insulating materials in laboratories.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, and in particular relates to a preparation method of a modified epoxy composite material. Background technique [0002] Due to its good electrical properties, mechanical properties and excellent chemical corrosion resistance, epoxy resin is used as an insulator and support for power equipment in GIS (gas-insulated switchgear), dry-type transformers, and reactors. etc. have been widely used. In order to further enhance the mechanical properties of epoxy, in power systems, epoxy resin\micron alumina composite materials are usually used to make pot insulators, and the mass fraction of alumina is close to 70%. In the industry, due to the large output, mature technology, and complete equipment and facilities, the epoxy-based micro-alumina composite material prepared by it has a high cross-linking degree, which is reflected in a high glass transition temperature. At present, a lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K3/22
Inventor 李盛涛李明儒牛欢闵道敏王威望毛航银刘晔
Owner XI AN JIAOTONG UNIV