Preparation method of intelligent insulation material with low packing ratio and non-linear conductance characteristics

An insulating material and nonlinear technology, applied in the field of preparation of intelligent insulating materials, can solve the problems of mechanical and mechanical properties deterioration of composites, high percolation threshold, improve uneven electric field distribution, avoid field intensity regional concentration, mechanical Performance-enhancing effects

Inactive Publication Date: 2019-12-13
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The percolation thresholds of the above modification schemes are relatively high, and a high volume fraction is required to exhibit the nonlinear conductance effect, and as the filler volume fraction gradually increases, it will have a certain deterioration effect on other mechanical and mechanical properties of the composite.

Method used

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  • Preparation method of intelligent insulation material with low packing ratio and non-linear conductance characteristics
  • Preparation method of intelligent insulation material with low packing ratio and non-linear conductance characteristics
  • Preparation method of intelligent insulation material with low packing ratio and non-linear conductance characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] ① Surface modification:

[0035] A. First place T-ZnOw in a vacuum drying oven at 100°C and dry continuously for 8 hours (hours);

[0036] B. Then get 5g deionized water, 10g silane coupling agent KH570, 40g (gram) absolute ethanol to be made into the ethanol solution of coupling agent;

[0037] C. Adjust the pH value of the ethanol solution of the coupling agent to 3 with hydrochloric acid, and hydrolyze it at room temperature for 1 hour to obtain a hydrolyzate;

[0038] D. Simultaneously disperse 100g of dried tetraacicular zinc oxide whiskers and 100g of absolute ethanol in a beaker for 1h to make a dispersion;

[0039] E. Pour the hydrolyzate into the dispersion, and stir in a constant temperature water bath at 60°C (temperature) and 800 rpm for 5 hours to obtain a stirring solution;

[0040] F. Place the stirred liquid in a suction filtration device for suction filtration, then take 100g of absolute ethanol and deionized water to wash, and repeat the washing twic...

Embodiment 2

[0047] ① Surface modification:

[0048] A. First place T-ZnOw in a vacuum drying oven at 100°C and dry continuously for 9 hours (hours);

[0049] B. Then get 2g deionized water, 4g silane coupling agent KH570, 16g (grams) absolute ethanol to make the ethanol solution of coupling agent;

[0050] C. Adjust the pH value of the ethanol solution of the coupling agent to 3.5 with hydrochloric acid, and hydrolyze at room temperature for 1 hour to obtain a hydrolyzate;

[0051] D. Simultaneously disperse 50g of dried tetraacicular zinc oxide whiskers and 50g of absolute ethanol in a beaker for 1h to make a dispersion;

[0052] E. Pour the hydrolyzed liquid into the dispersion liquid, and stir in a constant temperature water bath at 70°C (temperature) and 600 rpm for 4 hours to obtain a stirred liquid;

[0053] F. Place the stirred liquid in a suction filtration device for suction filtration, then take 100g of absolute ethanol and deionized water to wash, and repeat the washing twice; ...

Embodiment 3

[0060] ① Surface modification:

[0061] A. First place T-ZnOw in a vacuum drying oven at 100°C and dry continuously for 10 hours (hours);

[0062] B. Then get 8g deionized water, 16g silane coupling agent KH570, 64g (gram) dehydrated alcohol to be made into the ethanol solution of coupling agent;

[0063] C. Adjust the pH value of the ethanol solution of the coupling agent to 3.8 with hydrochloric acid, and hydrolyze it at room temperature for 1.5 hours to obtain a hydrolyzate;

[0064] D. Simultaneously disperse 130g of dried tetraacicular zinc oxide whiskers and 130g of absolute ethanol in a beaker for 1h to make a dispersion;

[0065] E. Pour the hydrolyzed liquid into the dispersion liquid, and stir in a constant temperature water bath at 80°C (temperature) and 500 rpm for 4 hours to obtain a stirred liquid;

[0066] F. Place the stirred liquid in a suction filtration device for suction filtration, then take 100g of absolute ethanol and deionized water to wash, and repea...

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Abstract

The invention provides a preparation method of an intelligent insulation material with low packing ratio and non-linear conductance characteristics. The method comprises steps as follows: (1) surfacemodification treatment is performed on tetrapod-shaped zinc oxide whiskers; (2) a T-ZnOw / silicone rubber composite is prepared from raw materials including the tetrapod-shaped zinc oxide whiskers subjected to surface modification treatment and liquid silicone rubber in the volume fraction of 5%-12% of T-ZnOw. According to the method, the tetrapod-shaped zinc oxide whiskers (T-ZnOw) subjected to surface modification treatment are taken as fillers and mixed with the liquid silicone rubber, the intelligent insulation material with low packing ratio and good non-linear conductance characteristicsis prepared, the asymmetrical electric field can be regulated in a self-adaptive manner, uneven field intensity distribution of electrical equipment is improved, meanwhile, no degradation influence iscaused to other properties such as mechanical property of the liquid silicone rubber, and the tensile strength of the silicone rubber body can be enhanced.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to a method for preparing an intelligent insulating material with a low filling ratio and non-linear electrical conduction characteristics. Background technique [0002] The safe operation of electrical equipment is subject to the physical structure of the equipment and the reliability of insulating materials. Many electrical equipment operating in the high-voltage field, such as cable terminal joints, insulators, lightning arresters, and high-voltage bushings, due to material properties and specific geometries, in During operation, it has been subjected to an extremely uneven electric field for a long time, and the higher the voltage level, the more obvious this uneven electric field distribution characteristic. In some common areas where the electric field is uneven, such as the stress cone part of the cable terminal, the silicone rubber shed part at the end of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/06C08K9/04C08K9/06C08K7/08
CPCC08K7/08C08K9/04C08K9/06C08K13/06C08L83/04
Inventor 刘凌云张吴欣李志恒王鲜周远明柳建军
Owner HUBEI UNIV OF TECH
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