Polymer insulator material and preparation method thereof

A technology of insulators and polymers, applied in the direction of organic insulators, insulators, plastic/resin/wax insulators, etc., can solve the problems of electrical aging resistance, low partial discharge breakdown performance, poor nonlinear conductivity of composite materials, and no internal resistance. Charge performance and other issues to achieve the effect of increasing capture and detrapping time, improving interface compatibility, and weakening surface polarity

Inactive Publication Date: 2016-05-25
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent has the following disadvantages: the composite material has low electrical aging resistance and partial discharge breakdown performance; the composite material has poor nonlinear electrical conductivity, and does not involve anti-internal charging performance; the composite material can only be used in general environments , cannot be applied to harsh environments such as radiation, high and low temperature conversion; the preparation method of the invention is difficult to shape

Method used

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  • Polymer insulator material and preparation method thereof
  • Polymer insulator material and preparation method thereof
  • Polymer insulator material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Pretreatment of thermoplastic polyimide molding powder: Weigh a preset amount of polyimide molding powder, and then place it in a vacuum drying oven for 24 hours at a drying temperature of 120°C and a vacuum degree of 10Pa to obtain The raw material of polyimide matrix after pretreatment;

[0032] Step 2: Cold press forming: put the pure polyimide material powder dried in step 1 into a mold for cold press forming, the forming pressure is 10MPa, and the duration is 15s;

[0033] Step 3: Segmented high temperature and high pressure molding: put the sample after cold pressing in step 2 into a molding machine for segmental high temperature and high pressure molding, starting from room temperature for 60 minutes to 270°C, and maintaining high pressure at 10MPa; 270°C, 10MPa Keep it warm for 20 minutes, at this time, the pure polyimide material is in a molten state; then take 5 minutes to raise the temperature to 300°C, hold it for 40 minutes, and keep the high pressu...

Embodiment 2

[0035] Step 1: Nano-zinc oxide filler dispersion and surface treatment: first mix ethanol and deionized water in a ratio of 95:5, add a coupling agent to prepare an alcoholic aqueous solution containing a coupling agent, and then add nano-zinc oxide powder to the In mixed alcohol aqueous solution containing coupling agent. Wherein the amount of the coupling agent is 3% of the mass of the nanometer zinc oxide powder. Then the above mixed solution was placed in an ultrasonic oscillator for ultrasonic oscillation and combined with high-speed stirring to disperse the inorganic particles for 30 minutes, such as figure 1 shown. Then put the above-dispersed suspension into a vacuum drying oven for drying treatment, the drying temperature is 105 ° C, the vacuum degree is 10 Pa, and the modified inorganic nano-zinc oxide powder is obtained by grinding. The coupling agent is γ-aminopropyl Triethoxysilane.

[0036] Thermoplastic polyimide molding powder pretreatment, weigh the polyimi...

Embodiment 3

[0041] Step 1: Nano-zinc oxide filler dispersion and surface treatment: first mix ethanol and deionized water in a ratio of 95:5, add a coupling agent to prepare an alcoholic aqueous solution containing a coupling agent, and then add nano-zinc oxide powder to the In mixed alcohol aqueous solution containing coupling agent. Wherein the amount of the coupling agent is 3% of the mass of the nanometer zinc oxide powder. Then the above mixed solution was placed in an ultrasonic oscillator for ultrasonic oscillation and combined with high-speed stirring to disperse the inorganic particles for 30 minutes, such as figure 1 shown. Then put the above-dispersed suspension into a vacuum drying oven for drying treatment, the drying temperature is 105 ° C, the vacuum degree is 10 Pa, and the modified inorganic nano-zinc oxide powder is obtained by grinding. The coupling agent is γ-aminopropyl Triethoxysilane.

[0042] Thermoplastic polyimide molding powder pretreatment, weigh the polyimi...

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Abstract

The invention discloses a polymer insulator material which is prepared from, by mass, 90-99% of polyimide and 1-10% of zinc oxide powder. A preparation method includes the following steps of firstly, adding nanometer zinc oxide powder to a mixed alcohol-water solution containing a coupling agent, dispersing the mixed solution through the ultrasonic oscillation and high-speed stirring combined mode, and conducting grinding after vacuum drying to obtain modified nanometer zinc oxide micro powder; secondly, dispersing the modified nanometer zinc oxide micro powder in the first step in ethyl alcohol, adding polyimide to be evenly stirred and dried to obtain the polymer insulator material powder, and pressing and forming the prepared polymer insulator material powder. The compound sample is prepared through a blending compound mode, operation is easy, conditions are easy to control, the environment is not polluted, and the material can be applied to preparation of polymer insulators of various powder materials. Therefore, the material has the advantages of being wide in application range, high in reliability, simple in process, high in operability and the like.

Description

technical field [0001] The invention belongs to the field of electrical high-voltage insulating materials, and in particular relates to a polymer insulator material and a preparation method thereof. Background technique [0002] Polymers have excellent electrical insulation properties and are widely used in aerospace industry, power system insulation, microelectronics and other fields, and are important insulating structural parts in the field of electrical high-voltage insulating materials. However, when a solid insulator is used as a support or insulation partition in a vacuum gap, a creeping flashover discharge phenomenon that is much lower than the intrinsic breakdown field strength of the insulator or the breakdown field strength of the vacuum gap will occur on the interface between the insulator and the vacuum. The vacuum flashover phenomenon seriously restricts the electric strength of the composite insulation system. The flashover discharge pulse will not only interf...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/10C08K9/06C08K3/22H01B3/30
CPCC08K9/10C08K3/22C08K9/06C08K2003/2296C08K2201/011H01B3/306C08L79/08
Inventor 张振军陈玉峰姚金霞袁海燕任敬国李杰朱庆东白德盟彭飞王建
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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