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A kind of EPDM 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 of reducing the breakdown field strength of insulating materials and affecting the safe operation of cable accessories, so as to reduce the probability of failure and stabilize the DC breakdown field Strong, homogenized internal electric field effect

Active Publication Date: 2021-04-13
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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  • A kind of EPDM rubber-based DC cable accessory material and preparation method thereof
  • A kind of EPDM rubber-based DC cable accessory material and preparation method thereof
  • A kind of EPDM rubber-based DC cable accessory material and preparation method thereof

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0030] A preparation method of EPDM-based DC cable accessory material, comprising the steps of:

[0031] 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;

[0032] 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;

[0033] 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

[0050] A preparation method of EPDM-based DC cable accessory material, comprising the steps of:

[0051] 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;

[0052] 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;

[0053] 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

[0060] 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 EPDM-based DC cable accessory material and a preparation method thereof, belonging to the field of DC cable accessory materials. In the present invention, boron nitride is first placed in absolute ethanol and deionized water to make boron nitride suspension A, and then formic acid and 3-aminopropyltriethoxysilane are added to the suspension to modify boron nitride , then wash, dry and grind the modified boron nitride to prepare boron nitride suspension B by adding absolute ethanol, add silver nitrate solution, sodium citrate solution and sodium borohydride solution dropwise to boron nitride suspension The turbid liquid B is processed to obtain silver / boron nitride composite powder. Put the EPDM rubber and silver / boron nitride composite powder into a double-roller mixer and mix them. After mixing evenly, add di Cumene, mixed for a certain period of time to obtain composite powder doped with EPDM rubber, and put it into a mold for hot-press vulcanization to obtain EPDM rubber-based DC cable accessory materials. The process and required equipment of the invention are simple and low in cost.

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 Patents(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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