Preparation method of high-temperature-resistant polysulfone-based composite insulation paper

A technology of composite insulation and high temperature resistance, which is applied in pulp beating method, special paper, synthetic cellulose/non-cellulose material pulp/paper, etc. It can solve the problems of shortening transformer life, accelerating insulation aging, and poor high temperature resistance. Achieve excellent mechanical properties, ensure electrical insulation properties, improve high temperature resistance and mechanical strength

Inactive Publication Date: 2020-01-31
刘干坤
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is that the traditional cellulose insulating paper has poor high temperature resistance. When the operating temperature of the transformer exceeds the withstand temperature of the insulating paper, the polymer chains of the insulating paper will be degraded, the insulating paper will become fragile, and the degree of polymerization will decrease. To solve the problem of accelerating insulation aging and shortening the life of transformers, a method for preparing high-temperature-resistant polysulfone-based composite insulating paper is provided

Method used

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  • Preparation method of high-temperature-resistant polysulfone-based composite insulation paper

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Experimental program
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Effect test

Embodiment 1

[0039] In terms of parts by weight, weigh 20 parts of polysulfone resin and 80 parts of N,N-dimethylformamide respectively, add polysulfone resin to N,N-dimethylformamide, and rotate at 200r / min at room temperature Stir for 30 minutes to obtain a polysulfone resin solution, place the polysulfone resin solution in an ultrasonic disperser, and oscillate ultrasonically with a power of 300W for 10 minutes at room temperature to obtain a polysulfone resin spinning solution, place the polysulfone resin spinning solution in a high-voltage electrostatic In the syringe of the spinning device, the diameter of the injection needle is 0.1 mm, and the distance between the injection needle and the collection drum is 12 cm. Under the condition of a voltage of 30 kV, the polysulfone resin spinning solution is sprayed to the collection drum at a flow rate of 0.2 mL / h On the top, the collection drum rotates at a speed of 60~80r / min to collect polysulfone fibers, and then weigh 20 parts of nano-s...

Embodiment 2

[0041] In terms of parts by weight, weigh 25 parts of polysulfone resin and 100 parts of N,N-dimethylformamide respectively, add polysulfone resin to N,N-dimethylformamide, and rotate at 225r / min at room temperature Stir for 35 minutes to obtain a polysulfone resin solution, place the polysulfone resin solution in an ultrasonic disperser, and oscillate ultrasonically with a power of 350W for 15 minutes at room temperature to obtain a polysulfone resin spinning solution, place the polysulfone resin spinning solution in a high-voltage electrostatic In the syringe of the spinning device, the diameter of the injection needle is 0.1 mm, and the distance between the injection needle and the collection drum is 14 cm. Under the condition of a voltage of 35 kV, the polysulfone resin spinning solution is sprayed to the collection drum at a flow rate of 0.3 mL / h On the top, the collection drum rotates at a speed of 70r / min to collect polysulfone fibers, and then weigh 25 parts of nano-sil...

Embodiment 3

[0043] In terms of parts by weight, weigh 30 parts of polysulfone resin and 120 parts of N,N-dimethylformamide respectively, add polysulfone resin to N,N-dimethylformamide, and rotate at 250r / min at room temperature Stir for 40 minutes to obtain a polysulfone resin solution, place the polysulfone resin solution in an ultrasonic disperser, and ultrasonically vibrate for 20 minutes at room temperature with a power of 400W to obtain a polysulfone resin spinning solution, place the polysulfone resin spinning solution in a high-voltage electrostatic In the syringe of the spinning device, the diameter of the injection needle is 0.1 mm, and the distance between the injection needle and the collection drum is 16 cm. Under the condition of a voltage of 40 kV, the polysulfone resin spinning solution is sprayed to the collection drum at a flow rate of 0.4 mL / h On the top, the collection drum rotates at a speed of 80r / min to collect polysulfone fibers, and then weigh 30 parts of nano-silic...

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Abstract

The invention relates to a preparation method of high-temperature-resistant polysulfone-based composite insulation paper, and belongs to the technical field of insulation materials. According to the invention, a polysulfone resin is used as a base material; in preparation of the high-temperature-resistant polysulfone-based composite insulation paper, the polysulfone resin can obtain excellent thermal oxidation stability due to lower polarity; two benzene rings are adjacent to sulfuryl to form a conjugated diphenol structure, so that molecular chains have good rigidity; the main chain of the polysulfone resin does not contain isopropylidene groups influencing the heat resistance or biphenyl groups capable of enabling molecular chains to be excessively rigid; therefore, the polysulfone resinretains good oxygen resistance and thermal stability of the polysulfone polymer; meanwhile, due to ether bonds on the main chain, the obtained material has certain flexibility; the above structure iscapable of providing the polysulfone resin with excellent mechanical property, high rigidity, wear resistance and high strength, the excellent mechanical property can be kept even at high temperature, and the high temperature resistance and the mechanical strength of the polysulfone-based composite insulation paper prepared taking the polysulfone resin as a raw material is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of high-temperature-resistant polysulfone-based composite insulating paper, which belongs to the technical field of insulating materials. Background technique [0002] Insulating paper is widely used as insulating material for equipment such as motors, cables, capacitors and transformers, and is also the main component material of insulating materials such as laminated products, composite materials and prepreg materials. Oil-paper composite insulation is currently a commonly used insulation structure for large UHV transformers. However, people do not fully understand the aging characteristics of this composite insulation structure under the effects of heat, electricity and other factors and the law of discharge along the surface. Mechanisms such as space charge effects are still lack of in-depth research. At the same time, traditional cellulose insulating paper has two disadvantages: [0003] (1) Poor hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/24D21H13/20D21H17/34D21H17/36D21H17/37D21H17/58D21H17/68D21H17/69D21D1/02D21F11/00D21H25/06D21H27/00
CPCD21D1/02D21F11/00D21H13/20D21H13/24D21H17/34D21H17/36D21H17/375D21H17/58D21H17/68D21H17/69D21H25/06D21H27/00
Inventor 刘乾坤
Owner 刘干坤
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