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Ethylene propylene diene monomer rubber-based DC cable accessory material and preparation method thereof

A technology of EPDM and DC cables, which is applied in the field of DC cable accessories materials, can solve the problems affecting the safe operation of cable accessories and reduce the breakdown field strength of insulating materials, so as to reduce the probability of failure and stabilize the DC breakdown field Effect of strong and large conductivity nonlinear coefficients

Active Publication Date: 2018-12-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-linear cable accessory material has a nonlinear conductivity and also greatly reduces the breakdown field strength of the insulating material, which affects the safe operation of the cable accessory.

Method used

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  • Ethylene propylene diene monomer rubber-based DC cable accessory material and preparation method thereof
  • Ethylene propylene diene monomer rubber-based DC cable accessory material and preparation method thereof
  • Ethylene propylene diene monomer rubber-based DC cable accessory material and preparation method thereof

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Experimental program
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Effect test

specific Embodiment approach 1

[0029] A preparation method of EPDM-based DC cable accessory material, comprising the steps of:

[0030] Step 1. Weigh boron nitride, absolute ethanol, and deionized water respectively according to a certain material-to-liquid ratio, add the weighed boron nitride, absolute ethanol, and deionized water into a beaker and stir, and then put it into an ultrasonic disperser Mid-ultrasonic, obtain boron nitride suspension A, stand-by;

[0031] Step 2. Weigh the boron nitride suspension A, formic acid, and 3-aminopropyltriethoxysilane prepared in step 1 according to a certain mass ratio, and weigh the boron nitride suspension A prepared in step 1. Suspension A, formic acid, and 3-aminopropyltriethoxysilane were added to a beaker, stirred, suction filtered, washed, and dried to obtain modified boron nitride for use;

[0032] Step 3. Grinding the modified boron nitride prepared in step 2, adding a certain volume of absolute ethanol, and putting it into an ultrasonic disperser for ultr...

specific Embodiment approach 2

[0048] A preparation method of EPDM-based DC cable accessory material, comprising the steps of:

[0049] Step 1. Weigh boron nitride, absolute ethanol, and deionized water respectively according to a certain material-to-liquid ratio, add the weighed boron nitride, absolute ethanol, and deionized water into a beaker and stir, and then put it into an ultrasonic disperser Mid-ultrasonic, obtain boron nitride suspension A, stand-by;

[0050] Step 2. Weigh the boron nitride suspension A, formic acid, and 3-aminopropyltriethoxysilane prepared in step 1 according to a certain mass ratio, and weigh the boron nitride suspension A prepared in step 1. Suspension A, formic acid, and 3-aminopropyltriethoxysilane were added to a beaker, stirred, suction filtered, washed, and dried to obtain modified boron nitride for use;

[0051] Step 3. Grinding the modified boron nitride prepared in step 2, adding a certain volume of absolute ethanol, and putting it into an ultrasonic disperser for ultr...

specific Embodiment approach 3

[0057] According to the preparation method of the EPDM rubber-based DC cable accessory material described in the second specific embodiment, the solid-liquid ratio of boron nitride, absolute ethanol, and deionized water in step 1 is 1g: 90-100ml: 4-7ml , the power of the ultrasonic disperser is 490W, and the ultrasonic time is 400min.

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Abstract

The invention discloses an ethylene propylene diene monomer rubber-based DC cable accessory material and a preparation method thereof, and belongs to the field of DC cable accessory materials. The method includes first preparing a boron nitride suspension A by placing boron nitride in anhydrous ethanol and deionized water, taking and adding formic acid and 3-aminopropyltriethoxysilane to the suspension to modify boron nitride, washing, drying and grinding the modified boron nitride and then adding absolute ethyl alcohol to make a boron nitride suspension B, sequentially adding dropwise a silver nitrate solution, a sodium citrate solution and a sodium borohydride solution to the boron nitride suspension B, performing treatment to obtain a silver / boron nitride composite powder, placing an ethylene propylene diene monomer rubber and the silver / boron nitride composite powder in a double-roller mixing mill for mixing, adding dicumyl peroxide after uniform mixing, obtaining a composite powder doped ethylene propylene diene monomer rubber after the mixing for a certain amount of time, and placing the composite powder doped ethylene propylene diene monomer rubber in a die to perform hot pressing vulcanization to obtain the ethylene propylene diene monomer rubber-based DC cable accessory material. The process and a needed device are simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of direct-current cable accessory materials, and in particular relates to an EPDM-based direct-current cable accessory material and a preparation method thereof. Background technique [0002] High-voltage DC cable line transmission has obvious advantages in long-distance and large-capacity transmission, so it has developed rapidly in recent years. Due to the difference in the electrical conductivity of the various components in the cable accessories and the accumulation of space charges, the electric field distribution in the cable accessories is seriously distorted, which makes the cable accessories prone to failure and major electrical accidents. Therefore, the cable accessories are also the weakest of the high-voltage DC cable accessories. one ring. [0003] EPDM rubber is widely used in wire and cable sheathing, cable accessories and other fields due to its excellent ozone resistance, heat resistance and aging re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K9/06C08K3/38C08K3/08C08K5/14C08K13/06
CPCC08K3/08C08K3/38C08K5/14C08K9/06C08K13/06C08K2003/0806C08K2003/385C08L23/16
Inventor 迟庆国杨蒙张天栋张昌海王暄
Owner HARBIN UNIV OF SCI & TECH
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