Preparation method of bacterial cellulose-epoxy resin flexible transformer encapsulating material

A technology of bacterial cellulose and flexible transformers, which is applied in the field of transformer materials, can solve the problems of increasing the cracking of epoxy resin packaging materials, affecting the work and living environment, and affecting the service life of transformers, so as to improve anti-vibration performance, high reliability, The effect of long service life

Inactive Publication Date: 2018-01-26
铜陵市永创变压器电子有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the toughness of the traditional epoxy resin packaging material is poor, and it is easy to crack, which makes the packaging material invalid and affects the service life of the transformer
However, the transformer is often in a state of vibration during operation. Affected by the vibration, it not only increases the possibility of cracking of the epoxy resin packaging material, thereby reducing the reliability of the transformer, but also generates noise, which affects the surrounding work and life. surroundings

Method used

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Embodiment Construction

[0017] A preparation method of bacterial cellulose-epoxy resin flexible transformer packaging material, comprising the following steps:

[0018] (1) After pulverizing the bacterial cellulose, mix it with 6% acetic acid aqueous solution at a weight ratio of 1:10, ultrasonically disperse for 1 hour, and then adjust the pH to 6 with sodium hydroxide to obtain bacterial cellulose slurry;

[0019] (2) Mix the bacterial cellulose slurry obtained in step (1) with the styrene-butadiene latex with a solid content of 20% in a volume ratio of 1:0.3, and then use a centrifugal spray dryer to perform centrifugal spray drying to obtain bacterial cellulose - styrene-butadiene rubber hybrid powder;

[0020] (3) Mix 80 parts by weight of epoxy resin, 10 parts by weight of bacterial cellulose-styrene-butadiene rubber hybrid powder described in step (2) and 20 parts by weight of curing agent and stir evenly to obtain bacterial cellulose-epoxy Resin flexible transformer packaging material.

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Abstract

The invention discloses a preparation method of a bacterial cellulose-epoxy resin flexible transformer encapsulating material. The preparation method comprises the steps of firstly crushing bacterialcellulose, adding the crushed bacterial cellulose into an acetic acid water solution, carrying out ultrasonic dispersion so as to obtain bacterial cellulose slurry, uniformly mixing the bacterial cellulose slurry with styrene-butadiene latex, carrying out centrifugal spray drying by virtue of a centrifugal spray dryer so as to obtain bacterial cellulose-butadiene styrene rubber hybridized powder,and uniformly mixing the hybridized powder with epoxy resin and a curing agent, so as to obtain the bacterial cellulose-epoxy resin flexible transformer encapsulating material. The prepared transformer encapsulating material has the characteristics of high tenacity and good vibration resistance, does not easily crack and lose efficacy and is high in reliability and long in service life.

Description

technical field [0001] The invention relates to the technical field of transformer materials, in particular to a preparation method of bacterial cellulose-epoxy resin flexible transformer packaging material. Background technique [0002] With the rapid development of the electronic industry, the application of transformers is becoming more and more extensive, and people have put forward higher requirements for the performance of transformers. Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC machinery and equipment, etc., occupying an important position in my country's transformer market. In dry-type transformers, the potting material used for coil casting greatly affects the performance of the transformer. [0003] Epoxy resin has excellent insulation properties, flame retardant properties and adhesive properties, small curing shrinkage rate and linear expansion coefficient, good dimensional stability, good processability, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L1/02C08L9/06
Inventor 姚永红
Owner 铜陵市永创变压器电子有限公司
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