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Carbon fiber paper and preparation method thereof

A carbon fiber paper and carbon fiber technology, applied in special paper, fiber raw material processing, synthetic cellulose/non-cellulose material pulp/paper, etc., to achieve the effect of reducing resistivity and improving mechanical properties

Pending Publication Date: 2021-11-16
浙江超探碳纤维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing technologies still have some problems in terms of effectiveness, speed, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example is a comparative example.

[0025] Take 5mm chopped polyacrylonitrile carbon fiber, soak it in 6M NaOH solution at room temperature for 30min, then wash it with clear water and dry it, and use it as the raw material of chopped carbon fiber for making carbon fiber paper; Cut carbon fiber raw materials, disperse, and make paper to obtain carbon fiber base paper. The base paper is impregnated with phenolic resin ethanol solution, dried, and hot-pressed at 160 °C and 1.0 MPa for 30 minutes; carbonization treatment at 1000°C for 1 hour to obtain carbon paper, and further graphitization at 2500°C for 30 minutes to adjust performance indicators.

[0026] The performance parameters of the carbon fiber paper obtained in this embodiment are: tensile strength 25.1 MPa, resistivity 6.1 mΩ.cm.

Embodiment 2

[0028] Get 5mm chopped polyacrylonitrile carbon fiber, under the high-energy electron beam that energy is 2MeV, beam current 30mA and power 0.9KW, process 60 seconds, as the chopped carbon fiber raw material that prepares carbon fiber paper; Use polyethylene oxide as dispersant in water The above-mentioned chopped polyacrylonitrile carbon fiber raw materials are dispersed and paper-made to obtain carbon fiber base paper. The base paper is impregnated with phenolic resin ethanol solution, dried, and hot-pressed at 180°C and 0.5MPa for 30min; the hot-pressed carbon fiber paper is cured at 200°C for 1 After one hour, carbonize at 1000°C for 1 hour in an inert atmosphere to obtain carbon paper, and then graphitize at 2500°C for 30 minutes to adjust performance indicators.

[0029] The performance parameters of the carbon fiber paper obtained in this embodiment are: tensile strength 34.5 MPa, resistivity 5.6 mΩ.cm.

Embodiment 3

[0031] Get 8mm short-cut polyacrylonitrile carbon fiber, and treat it under the high-energy electron beam with energy of 2MeV, beam current 60mA and power 1.20KW for 10 seconds, as the chopped carbon fiber raw material for preparing carbon fiber paper; take polyethylene oxide as dispersant in water The above-mentioned chopped polyacrylonitrile carbon fiber raw materials are dispersed and paper-made to obtain carbon fiber base paper. The base paper is impregnated with phenolic resin ethanol solution, dried, and hot-pressed at 140°C and 1.1MPa for 30min; the hot-pressed carbon fiber paper is cured at 200°C for 1 After one hour, carbonize at 1000°C for 1 hour in an inert atmosphere to obtain carbon paper, and then graphitize at 2500°C for 30 minutes to adjust performance indicators.

[0032] The performance parameters of the carbon fiber paper obtained in this example are: tensile strength 37.6 MPa, resistivity 5.4 mΩ.cm.

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Abstract

The invention discloses carbon fiber paper and a preparation method thereof. The preparation method comprises the following steps of: (1) carrying out surface treatment on chopped polyacrylonitrile carbon fibers by adopting a high-energy electron beam; and (2) carrying out dispersion, papermaking, resin impregnation, drying, hot pressing, curing, carbonization and graphitization on the chopped polyacrylonitrile carbon fibers treated in the step (1) to obtain carbon fiber paper. A high-energy electron beam is used for preparing the carbon fiber paper based on the advantages of the high-energy electron beam, so that the compounding interface condition of the carbon fibers and the resin is improved, and the carbon fiber paper with excellent performance is prepared.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber application, and in particular relates to a carbon fiber paper and a preparation method thereof. Background technique [0002] Carbon fiber paper is a paper-like product made of chopped carbon fiber through the conventional papermaking process and subsequent impregnation, curing, carbonization and graphitization processes. The product is a composite material of carbon fiber and binder resin carbon. In the manufacturing process of composite materials, the most important thing is that the various materials participating in the composite need to ensure the effective combination of the interface, so researchers have developed many methods to improve the performance of composite materials. [0003] As a reinforcing agent for composite materials, carbon fiber is used as a composite material reinforcement. One of the subsequent processes is surface treatment. A certain number of functional groups co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H27/00
CPCD21H13/50D21H27/00
Inventor 汪训国王波江旭
Owner 浙江超探碳纤维科技有限公司
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