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Preparation method of insulating paper with acid-base durability and hydrophobic self-repairing function

An insulating paper and durability technology, applied in the field of power system and oil-paper insulation system inside power transformers, can solve the problems of hydrophobic surface damage, limited insulation life, insulation paper affecting mechanical properties and thermal stability performance, etc., to achieve resistance to physical Wear, surface energy reduction effect

Inactive Publication Date: 2021-07-27
SOUTHWEST UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical problem mainly solved by the present invention is: traditional insulating paper is easily affected by moisture, acid gas, and weak acid substances decomposed in the thermal aging process to affect mechanical properties and thermal stability, and the hydrophobic surface of insulating paper is easily damaged in a heated oil environment. damage, leading to the disadvantages of limited insulation life during its use

Method used

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  • Preparation method of insulating paper with acid-base durability and hydrophobic self-repairing function
  • Preparation method of insulating paper with acid-base durability and hydrophobic self-repairing function
  • Preparation method of insulating paper with acid-base durability and hydrophobic self-repairing function

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Effect test

example 1

[0033] The 1 g of the polytetrafluoroethylene PTFE nanoparticles were proposed to 3.5 g of fluorocarbon surfactant ST-110, and then the fluorinated alkylsilane (FAS) 1.5 ml was added, and after preliminary mixing was dispersed, the magnetic stirrer was stirred for 20 min to form uniform Dispersions. To the dispersion, 2 g of ammonium chloride powder and a small amount of deionized water were added, and the aqueous coating solution was concentrated. To the concentrated suspension, 200 ml of deionized water was added, and the magnetic force was stirred for 30 min, a stable aqueous coating solution was obtained, and the no obvious precipitate was observed after 1 h. The insulating paper substrate was observed. The insulating paper was sprayed using a spray bottle, and the spray distance was 10 cm. When the substrate was 12 cm of insulating paper, the amount of solution was 50 ml; or the insulating paper was soaked directly in a coating solution for 5 minutes. After 20 min, after 20 m...

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Abstract

The invention relates to a preparation method of insulating paper with acid-base durability and a hydrophobic self-repairing function. According to the invention, an insulating paper board for a transformer is adopted as a base material, PTFE hydrophobic nano particles, fluorinated alkyl silane (FAS) and a fluorocarbon surfactant ST-110 are adopted as main raw materials and can form a dispersion capable of being used as a coating material in deionized water under the synergistic effect, and NHCl4 is adopted as a suspending agent, and is added, so that the dispersion can form a durable and uniform coating solution in water; after the coating material is uniformly sprayed and dried, the insulating paper has good hydrophobic and oleophobic performance; the durability is realized, and the performance is not obviously reduced after being placed in air, water and oil environments for more than 30 days; good acid and alkali resistance is achieved; and when the insulating paper can be wetted by water, the insulating paper does not have hydrophobicity, but the hydrophobic characteristic of the insulating paper can be recovered after the insulating paper is heated at 130 DEG C for 10 minutes.

Description

Technical field [0001] The present invention belongs to the field of power systems, and in particular, the present invention relates to the field of electric transformer internal oil-paper insulating system. Background technique [0002] In recent years, with the power network to the "ultra high pressure, large capacity", the internal oil of the power transformer - paper insulation systems will face more difficult challenges. During long-term operation, the thermal aging phenomenon of insulating paper causes its mechanical properties to deteriorate and affects its thermal stability, which eventually leads to a decrease in transformer insulation performance and shorten its service life. At present, researchers have conducted a lot of analysis of the thermal aging characteristics and mechanisms of the insulating paper, and the influencing factors of the inkodable paper are temperature, moisture and aging products, etc. [0003] Among them, the moisture has an accelerated effect on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H19/10D21H21/52D21H21/24D21H17/35D21H17/13D21H17/66
CPCD21H27/00D21H19/10D21H21/52D21H21/24D21H17/35D21H17/13D21H17/66
Inventor 唐超张津竹刘竟成李娇胡东郭丽杨路邱秦攀
Owner SOUTHWEST UNIVERSITY
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