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High-heat-conductivity interphase pitch-based carbon fiber intercalation stripping method

A technology of mesophase pitch and carbon fiber, applied in ultrasonic/sonic fiber treatment and other directions, to achieve the effect of enhancing bonding force, improving mechanical properties, and large intercalation peeling degree

Active Publication Date: 2019-11-26
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the internal structure of carbon fiber is mostly speculated by indirect characterization methods such as X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy and computational simulation of fiber monofilament. It is difficult to observe the internal structure of carbon fiber and establish an accurate structure through intuitive methods. Models and Mechanisms of Heat Conduction

Method used

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  • High-heat-conductivity interphase pitch-based carbon fiber intercalation stripping method
  • High-heat-conductivity interphase pitch-based carbon fiber intercalation stripping method
  • High-heat-conductivity interphase pitch-based carbon fiber intercalation stripping method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Use acetone solvent to extract and wash the high thermal conductivity mesophase pitch-based carbon fiber XN-90 monofilament of Nippon Graphite Co., Ltd., wash and dry it with deionized water, and then fix it on the anode of the electrolysis device; insert the platinum electrode pieces of the anode and cathode at 13mol / dm 3 Conduct direct current electrolysis in concentrated nitric acid, the voltage is 10V, the current is 0.05mA. After electrolysis for 10 minutes, the carbon fiber is taken out and washed repeatedly with deionized water and dried; the electrolytic dried carbon fiber is quickly placed in a high-temperature inert gas tube furnace at 1300°C to expand and burst 10s, and then take it out and let it dry at room temperature to obtain a stripped carbon fiber sample.

[0040] The scanning electron microscope photos of high thermal conductivity mesophase pitch-based carbon fiber XN-90 before and after intercalation and stripping are shown in figure 1 and figure 2...

Embodiment 2

[0042] Use acetone solvent to extract and wash the bundles of high thermal conductivity mesophase pitch-based carbon fiber K1100 from Cytec Corporation of the United States, wash and dry them with deionized water, and then fix them on the anode of the electrolysis device; insert the platinum electrode sheets of the anode and cathode at 18mol / dm 3 Direct current electrolysis in concentrated sulfuric acid with a voltage of 20V and a current of 0.1mA. After 20 minutes of electrolysis, the carbon fiber was taken out and washed repeatedly with deionized water and dried; the carbon fiber after electrolysis and drying was quickly placed in a high-temperature inert gas tube furnace at 1200°C to expand and burst 5s, and then take it out and let it dry at room temperature to obtain a stripped carbon fiber sample. The scanning electron microscope photos of the high thermal conductivity mesophase pitch-based carbon fiber K1100 before and after intercalation and stripping are shown in ima...

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Abstract

The invention relates to a high-heat-conductivity interphase pitch-based carbon fiber intercalation stripping method, and belongs to the technical field of material preparation and performance testing. The method comprises the steps that a sizing agent on the surface of a carbon fiber is removed through extraction with a solvent, and after being washed and dried, the carbon fiber is fixed to an anode of an electrolyzing device; an electrode slice of the anode and an electrode slice of a cathode are inserted into an electrolyte, a direct-current power supply is turned on for electrolysis, afterelectrolysis is completed, the carbon fiber is taken out to be washed and dried; the carbon fiber obtained after electrolysis and drying is placed in a high-temperature tube furnace for swelling, andthen taken out to be air-dried at the room temperature to obtain the stripped carbon fiber. The intercalation stripped carbon fiber prepared by using the method can be used for researching a carbon fiber structure model and heat conduction and electric conduction mechanisms, and also can be used in the fields of capacitors, reinforced composite materials and the like.

Description

technical field [0001] The invention relates to a high thermal conductivity mesophase pitch-based carbon fiber intercalation stripping method, which belongs to the technical field of material preparation and performance testing. The high thermal conductivity refers to that the thermal conductivity of the carbon fiber is not lower than 500W / (m·K). Background technique [0002] High thermal conductivity mesophase pitch-based carbon fiber has high thermal conductivity, tensile modulus and near-zero thermal expansion coefficient, and its reinforced composite materials are used in high thermal conductivity structural panels, high rigidity structural parts, and zero expansion coefficient parts in temperature alternating environments It plays an irreplaceable role in aspects such as high thermal conductivity and heat-proof structural parts, and is an irreplaceable key core material in the main structure, functional structure, protective structure and auxiliary structure of the satel...

Claims

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Application Information

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IPC IPC(8): D06M10/02
CPCD06M10/02
Inventor 朱世鹏杨云华冯志海张灏
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH