Surface-modified composite fiber filter membrane as well as preparation method and application thereof

The surface-modified composite fiber filter membrane prepared by electrospinning technology, combined with the use of ZrO2 nanoparticles, solves the problem of degradation of insulation performance caused by moisture and impurities in aging mineral insulating oil, and achieves efficient purification of aging insulating oil and increases breakdown voltage.

CN119656891AActive Publication Date: 2025-03-21GUANGDONG POWER GRID CO LTD +1
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Patent Information

Application Number
CN202411818815.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-03-21
Estimated Expiration
2044-12-11

AI Technical Summary

Technical Problem

Due to the existence of moisture and impurities in aging mineral insulating oil, the insulation performance is degraded. The prior art is difficult to effectively remove these impurities, resulting in waste of resources and environmental pollution.

Method used

Electrospinning technology is used to prepare surface-modified composite fiber filter membranes, and ZrO2 nanoparticles are introduced into the filter membrane to improve the hydrophobic effect and specific surface area of ​​the filter membrane, and to achieve accurate filtration of trace moisture and impurities in the aged mineral insulating oil.

Benefits of technology

Through this method, the breakdown voltage of aging insulating oil is significantly increased, resource waste and environmental pollution are reduced, and efficient purification of aging mineral insulating oil is achieved.

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Abstract

The invention discloses a surface-modified composite fiber filter membrane as well as a preparation method and application thereof, and relates to the field of insulating oil filtration treatment. The preparation method comprises the following steps: uniformly stirring PVA powder, a solvent and ZrO2 nanoparticles to obtain a spinning solution; the spinning solution is prepared into the composite fiber filter membrane by adopting an electrostatic spinning technology, and the composite fiber filter membrane can be applied to the field of filtration and purification treatment of mineral insulating oil. The electrostatic spinning technology is adopted for preparing the filter membrane, the filter membrane has the advantages of being small in fiber diameter, good in uniformity, high in porosity and large in flux, ZrO2 nano particles are introduced into the filter membrane to increase the specific surface area and provide the impurity adsorption effect, trace moisture and micro impurities in the aged mineral insulating oil are adsorbed and intercepted, and the filter membrane has the advantages of being small in fiber diameter, good in uniformity, high in porosity and large in flux. Accurate filtering of the aged mineral insulating oil is achieved, the breakdown voltage of the aged insulating oil is effectively improved, and resource waste of the mineral insulating oil and pollution to the environment are reduced.
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