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Preparation method of anti-ageing agent for transformer insulating paper

An anti-aging agent and insulating paper technology, applied in papermaking, textile and papermaking, non-fiber pulp addition, etc., can solve the problems of easy hydrolysis environment of acrylonitrile, safety influence of power transformers, pollution, etc., and achieve high temperature resistance and anti-aging performance. The effect of improving, high temperature resistance and anti-aging performance, and prolonging the service life

Inactive Publication Date: 2013-08-28
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the insulating paper is aging near the end of its life, it will have a huge impact on the safety of power transformers
Use acrylonitrile to modify natural fibers to produce cyanoethylated fiber insulating paper, which can improve the high temperature and aging resistance of insulating paper, but acrylonitrile is easy to hydrolyze and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 15g of nanocellulose and 85ml of distilled water into the three-necked flask. After stirring evenly, install the stirrer and place it in a water bath. Add 0.72g of potassium persulfate and 0.18g of sodium bisulfite into the three-necked flask. After initiating the reaction for 15 minutes, add 9g of dicyandiamide, raise the reaction temperature to 65°C, and adjust the reaction pH to 7.5 with 1% sodium hydroxide. After 5 hours of reaction, the reaction is over, washed with distilled water, and dried in vacuum to obtain nano Cellulose-dicyandiamide antiaging agent.

Embodiment 2

[0017] Add 20g of nanocellulose and 180ml of distilled water into the three-necked flask. After stirring evenly, install the stirrer and place it in a water bath. Add 1.5g of potassium persulfate and 0.5g of sodium bisulfite into the three-necked flask. After initiating the reaction for 20 minutes, 14g of dicyandiamide was added, the reaction temperature was raised to 60°C, and the reaction pH was adjusted to 7.5 with 1% sodium hydroxide. After 6 hours of reaction, the reaction was completed, washed with distilled water, and dried in vacuum to obtain nano Cellulose-dicyandiamide antiaging agent.

Embodiment 3

[0019] Add 20g of nanocellulose and 180ml of distilled water into the three-necked flask. After stirring evenly, install the stirrer and place it in a water bath. Add 1.5g of potassium persulfate and 0.5g of sodium bisulfite into the three-necked flask. After initiating the reaction for 20 minutes, add 14 g of melamine, raise the reaction temperature to 65°C, adjust the reaction pH to 7.5 with 1% sodium hydroxide, and after 5 hours of reaction, the reaction is completed, washed with distilled water, and vacuum-dried to obtain nanocellulose for insulating paper. -Melamine anti-aging agent.

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PUM

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Abstract

The invention discloses a preparation method of an anti-ageing agent for transformer insulating paper. The preparation method comprises the following steps of: firstly, adding nanometer cellulose and water in a reaction container according to a proportion for uniformly mixing, adding potassium persulfate and sodium hydrogen sulfite according to the proportion while stirring, initiating for 10 minutes-30 minutes at the temperature of 40 DEG C-60 DEG C; and then, adding a high-nitrogen compound, reacting for 3 hours-6 hours at a grafting reaction temperature of 50 DEG C-70 DEG C, washing and vacuum drying to obtain the anti-ageing agent. The insulating paper prepared by adding the anti-ageing agent disclosed by the invention has excellent anti-ageing performances which are improved by 10%-20% under the same condition. In the transformer oil paper insulating system, the insulating paper has no adverse effects to the characteristics of the transformer oil and does not affect the insulating performances of the oil paper insulating system.

Description

[0001] technical field [0002] The invention belongs to the technical field of polymer chemical antiaging agents, and in particular relates to a preparation method of an antiaging agent for transformer insulating paper. Background technique [0003] Transformers are important equipment in the power system. Once an accident occurs, it may cause a large-scale power outage, and the maintenance period is long, the maintenance cost is high, and the impact is wide. The insulation form of the transformer mainly adopts the oil-paper insulation structure, that is, the insulating paper is impregnated with insulating oil to eliminate the air gap generated by the fiber pores of the insulating paper and improve the electrical strength of its insulation. After the transformer has been used for a certain number of years, due to aging factors such as temperature, moisture, and oxygen, the insulating paper will undergo insulation aging. The aging process of the insulating paper is irrevers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/14C08B15/06
Inventor 陈启杰晏永祥
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY