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

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...

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