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Adhesive with efficient barrier property, preparation method and application of adhesive in composite insulator

A composite insulator and adhesive technology, applied in the field of electric power, can solve problems such as poor water vapor barrier performance, and achieve the effects of strong water blocking sealing effect, strengthening bonding strength, and enhancing dispersibility.

Active Publication Date: 2022-01-14
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a high-efficiency barrier adhesive and its preparation method and its application in composite insulators to solve the technical problem that the adhesive between the interfaces of composite insulators has poor water vapor barrier performance

Method used

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  • Adhesive with efficient barrier property, preparation method and application of adhesive in composite insulator
  • Adhesive with efficient barrier property, preparation method and application of adhesive in composite insulator

Examples

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Effect test

preparation example 1

[0036] A modified g-C 3 N 4 , prepared by the following steps:

[0037] S101. Grind melamine evenly and put it in a semi-closed crucible, place it in a muffle furnace and raise the temperature to 550°C at a rate of 5°C / min, keep it warm for 4h, take it out after cooling down, and grind the product with an agate mortar To a uniform powder, that is, the graphite phase g-C 3 N 4 ;

[0038] S102, mixing tetraethoxysilane and aminopropyltriethoxysilane in a mass ratio of 7:3 to prepare an initial solution;

[0039] S103, 10g graphite phase g-C 3 N 4 Add 30mL of the initial solution, use acetic acid to adjust the pH of the solution to 4.5, and then sonicate for 1 hour to obtain a suspension;

[0040] S104. The suspension is centrifuged to collect the precipitate, and the precipitate is washed 5 times with ethanol solution to prepare the modified g-C 3 N 4 .

preparation example 2

[0042] A modified g-C 3 N 4, prepared by the following steps:

[0043] S101. Grind melamine evenly and put it in a semi-closed crucible, place it in a muffle furnace and raise the temperature to 550°C at a rate of 8°C / min, keep it warm for 5h, take it out after cooling down, and grind the product with an agate mortar To a uniform powder, that is, the graphite phase g-C 3 N 4 ;

[0044] S102, mixing tetraethoxysilane and aminopropyltriethoxysilane in a mass ratio of 5:5 to prepare an initial solution;

[0045] S103, 10g graphite phase g-C 3 N 4 Add 45mL of the initial solution, use acetic acid to adjust the pH value of the solution to 4.5, and then sonicate for 1.5h to obtain a suspension;

[0046] S104. The suspension is centrifuged to collect the precipitate, and the precipitate is washed 3 times with ethanol solution to prepare the modified g-C 3 N 4 .

preparation example 3

[0048] A modified g-C 3 N 4 , prepared by the following steps:

[0049] S101. Grind melamine evenly and place it in a semi-closed crucible, place it in a muffle furnace and raise the temperature to 550°C at a rate of 10°C / min, keep it warm for 6 hours, take it out after cooling down, and grind the product with an agate mortar To a uniform powder, that is, the graphite phase g-C 3 N 4 ;

[0050] S102, mixing tetraethoxysilane and aminopropyltriethoxysilane in a mass ratio of 8:2 to prepare an initial solution;

[0051] S103, 10g graphite phase g-C 3 N 4 Add it to 20mL of the initial solution, adjust the pH of the solution to 4.5 with acetic acid, and then sonicate for 2 hours to obtain a suspension;

[0052] S104. The suspension is centrifuged to collect the precipitate, and the precipitate is washed 4 times with ethanol solution to prepare the modified g-C 3 N 4 .

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Abstract

The invention discloses an adhesive with efficient barrier property, a preparation method and application of the adhesive in a composite insulator, and relates to the field of electric power. The adhesive is prepared from epoxy resin, modified g-C3N4 and dicyandiamide, and the modified g-C3N4 is prepared by modifying graphite phase g-C3N4 with tetraethoxysilane and aminopropyltriethoxysilane. The preparation method comprises the following steps: ultrasonically mixing the modified g-C3N4 and the epoxy resin, then adding the dicyandiamide, and performing mixing to obtain the adhesive. The adhesive is used for sealing and bonding an interface between a composite insulator fitting and a core rod. The modified g-C3N4 is utilized to enhance the water vapor blocking performance of the adhesive, and meanwhile, dicyandiamide and a zinc coating of a hardware fitting are subjected to an oxidation-reduction reaction to produce chemical bonds, so that the interface bonding strength of the hardware fitting and an adhesive layer is enhanced, and the water vapor blocking performance is further improved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a high-efficiency barrier adhesive, a preparation method and its application in composite insulators. Background technique [0002] With the increase of service life and the influence of ultraviolet radiation and other factors, the breakdown accidents in composite insulators of operating lines are increasing. Composite insulators are mainly composed of silicone rubber sheds and sheaths, epoxy resin fiberglass mandrels and fittings at both ends. The connection between the end fittings and the mandrel usually adopts the crimping process, that is, the fittings are pressed from the outside to the inside through the compression mold to deform the fittings and hold the mandrel tightly. Due to defects in processing technology and moisture intrusion caused by sealing failure, there are hidden defects inside the composite insulator. The existence of internal insulation defects will cause pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/04C09J5/00H01B17/38H01B19/00
CPCC09J163/00C09J11/04C09J5/00H01B17/38H01B19/00C08K9/06C08K3/28
Inventor 黄振彭向阳汪政方鹏飞吴吉何衍和张胜杰
Owner GUANGDONG POWER GRID CO LTD