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Preparation method for high-temperature-resistant insulation paper

A high-temperature-resistant insulating paper technology, applied in pulp beating methods, special paper, insulators, etc., can solve the problems of poor strength performance of insulating paper, achieve low water absorption, excellent radiation resistance, excellent oxidation resistance and acid corrosion resistance performance effect

Inactive Publication Date: 2020-05-01
李可禛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention: Aiming at the problem of poor strength performance of traditional insulating paper, a preparation method of high temperature resistant insulating paper is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 3,3',4,4'-biphenyltetracarboxylic dianhydride, p-phenylenediamine, N,N-dimethylacetamide, silicon carbide, 3,3',4,4'-biphenyltetra Formic dianhydride, p-phenylenediamine and N,N-dimethylacetamide are mixed, stirred and reacted to obtain the reactant, silicon carbide is added to the reactant, ultrasonically dispersed, and the spinning solution is obtained; the spinning solution Place it in a syringe for electrospinning to obtain plain silk. After the silk is imidized and cooled to room temperature, composite fibers are obtained; the composite fibers are impregnated and dried to obtain pretreated fibers. Put the pretreated fibers into In the vertical vapor deposition furnace, ventilate and react, and cool to room temperature to obtain the precursor fiber; mix the precursor fiber and softwood kraft wood pulp to obtain a mixed pulp, and use a paper sampler to make paper, quantitatively 90g / m 2 , that is, wet paper, put the wet paper on a flat vulcanizing machine, heat...

Embodiment 2

[0035] Take 3,3',4,4'-biphenyltetracarboxylic dianhydride, p-phenylenediamine, N,N-dimethylacetamide, silicon carbide, 3,3',4,4'-biphenyltetra Formic dianhydride, p-phenylenediamine and N,N-dimethylacetamide are mixed, stirred and reacted to obtain the reactant, silicon carbide is added to the reactant, ultrasonically dispersed, and the spinning solution is obtained; the spinning solution Place it in a syringe for electrospinning to obtain plain silk. After the silk is imidized and cooled to room temperature, composite fibers are obtained; the composite fibers are impregnated and dried to obtain pretreated fibers. Put the pretreated fibers into In the vertical vapor deposition furnace, ventilate and react, and cool to room temperature to obtain the precursor fiber; mix the precursor fiber and softwood kraft wood pulp to obtain a mixed pulp, and use a paper sampler to make paper, quantitatively 90g / m 2 , that is, wet paper, put the wet paper on a flat vulcanizing machine, heat...

Embodiment 3

[0037] Take 3,3',4,4'-biphenyltetracarboxylic dianhydride, p-phenylenediamine, N,N-dimethylacetamide, silicon carbide, 3,3',4,4'-biphenyltetra Formic dianhydride, p-phenylenediamine and N,N-dimethylacetamide are mixed, stirred and reacted to obtain the reactant, silicon carbide is added to the reactant, ultrasonically dispersed, and the spinning solution is obtained; the spinning solution Place it in a syringe for electrospinning to obtain plain silk. After the silk is imidized and cooled to room temperature, composite fibers are obtained; the composite fibers are impregnated and dried to obtain pretreated fibers. Put the pretreated fibers into In the vertical vapor deposition furnace, ventilate and react, and cool to room temperature to obtain the precursor fiber; mix the precursor fiber and softwood kraft wood pulp to obtain a mixed pulp, and use a paper sampler to make paper, quantitatively 90g / m 2 , that is, wet paper, put the wet paper on a flat vulcanizing machine, heat...

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Abstract

The invention relates to a preparation method for high-temperature-resistant insulation paper, belonging to the technical field of insulation paper materials. The preparation method comprises the following steps: blending polyimide with silicon nitride, and carying out electrostatic spinning so as to prepare polyimide fibers; with propylene as a carbon source and FeCl3.6H2O as a catalyst, carryingout in-situ vapor deposition on the polyimide fibers by adopting a chemical vapor deposition method so as to grow carbon fibers, mixing the carbon fibers with softwood kraft pulp, and carrying out pulping and wet molding so as to prepare the high-temperature-resistant insulation paper. The polyimide fibers have high strength, high modulus, low water absorption property, high-temperature resistance, excellent radiation resistance, excellent oxidation resistance, excellent acid corrosion resistance and excellent dielectric property; the carbon fibers have the characteristics of high temperatureresistance, friction resistance, electric conduction, heat conduction, corrosion resistance and the like, is fibrous and soft in appearance, and can be processed into various fabrics; the graphite microcrystalline structure of the carbon fibers has preferred orientation along a fiber axis, so the carbon fibers have high strength and modulus along a fiber axis direction; thus, the prepared insulation paper has good high-temperature resistance and strength performance.

Description

technical field [0001] The invention relates to a preparation method of high temperature resistant insulating paper, which belongs to the technical field of insulating paper materials. Background technique [0002] Electrical insulation materials are important materials in modern electrical equipment, and are widely used in traction motors, high-voltage power generation and transmission equipment, electrical appliances, home appliances, new energy and other fields. With the rapid development of industrial technology, the accelerated process of railway electrification, the rapid development of high-voltage direct current transmission technology, and the continuous construction of the national grid, large-scale electrical equipment is gradually tending to the direction of ultra-high voltage, large capacity, small size, light weight, and reliable operation. Correspondingly, higher requirements are put forward for the safety and reliability of various electrical insulating mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/26D21H13/50D01F6/94D01F1/10D01F9/12D21H27/12D21D1/02D21F11/00
CPCD01F1/10D01F6/94D01F9/12D21D1/02D21F11/00D21H13/26D21H13/50D21H27/00
Inventor 李可禛
Owner 李可禛
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