Preparation method and application of nano-particle dispersed and modified insulating paperboard based on surface modification

A nanoparticle and surface modification technology, applied in the direction of insulators, organic insulators, fiber dispersant addition, etc., can solve the problems of poor dispersion of insulating cardboard nanoparticles, reduce the space charge induced electric field, homogenize the electric field distribution, improve shock The effect of field strength

Inactive Publication Date: 2022-02-25
STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor dispersion of nanoparticles in the insulating paperboard prepared by the existing method, and to provide a method for preparing insulating paperboard based on surface modified nanoparticle dispersion and modification and its application

Method used

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  • Preparation method and application of nano-particle dispersed and modified insulating paperboard based on surface modification
  • Preparation method and application of nano-particle dispersed and modified insulating paperboard based on surface modification
  • Preparation method and application of nano-particle dispersed and modified insulating paperboard based on surface modification

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specific Embodiment approach 1

[0028] Specific Embodiment 1: In this embodiment, a method for preparing insulating paperboard based on surface-modified nanoparticle dispersion and modification is implemented according to the following steps:

[0029] 1. Beating: according to the mass volume ratio of 460g:5L, soak the dry pulp in distilled water for 4-6 hours, then tear it into several small pieces, pour it into the beater together with the distilled water used for soaking, and add distilled water Beating after being constant to 23L, then measuring the degree of beating of the pulp by the Schober-Rigler method, when it reaches 40 ° SR, stop beating, and the resulting slurry is drained to obtain a pulp block;

[0030] Two, dissociation: put above-mentioned pulp block and distilled water into standard disintegrating machine by mass volume ratio 20g:2000ml and carry out wet dissociation, obtain wet pulp;

[0031] 3. Nanoparticle surface modification: Add the dispersant to distilled water and mix evenly before a...

specific Embodiment approach 2

[0041] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the size of tearing into small pieces in step 1 is (20-30) mm×(20-30) mm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0042] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the rotational speed of beating in step 1 is 1500-2000 r / min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method and application of a nano-particle dispersed and modified insulating paperboard based on surface modification, belongs to the technical field of insulating paperboards of transformers, and aims to solve the problem of poor nanoparticle dispersion of insulating paperboards prepared by existing methods. The method comprises the following steps of: 1, pulping; 2, dissociation; 3, modifying the surfaces of nano-particles; 4, manufacturing and forming; 5, squeezing; and 6, drying. The material is used as a material of a capacitor core of a capacitor bushing for a converter transformer. According to the nano-particle dispersed and modified insulating paperboard based on surface modification prepared by the invention, nano-particles on the surface are uniformly dispersed, and the distance between adjacent nano-particles is reduced along with the increase of the nano-doping proportion; and the uniformly dispersed nano-particles improve the insulation resistance of the insulating paperboard, effectively improve the breakdown field strength of the insulating paperboard, improve the operation reliability of the transformer and prolong the service life of the transformer. The insulating paperboard is used as a material of a capacitor core of a capacitor bushing for a converter transformer.

Description

technical field [0001] The invention belongs to the technical field of insulating paperboard for transformers, and in particular relates to a preparation method and application of an insulating paperboard based on surface-modified nanoparticles dispersed and modified. Background technique [0002] As one of the most mature insulation methods at present, the oil-paper composite insulation structure is widely used in converter transformers and high-voltage outlet devices. However, electric field concentration is prone to occur in the insulating cardboard of the transportation transformer, which may lead to abnormal discharge or even breakdown of the insulating structure. At the same time, considering the influence of space charge and electrical / thermal aging on the dielectric properties of insulating paperboard, the actual situation will be more complicated. The modification of insulating paperboard provides a feasible method for improving the dielectric parameters of insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/00D21H21/52D21H21/08D21H17/68D21H17/53H01B3/52D21H27/12
CPCD21H11/00D21H21/52D21H21/08D21H17/68D21H17/53H01B3/52
Inventor 刘贺千陈世玉许敏虎张朋曲利民张亮梁建权张可心赵翔宇张震宫铭辰
Owner STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST
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