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Surface modification method for carbon fiber powder

A carbon fiber powder and surface modification technology, applied in the directions of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of poor wettability and dispersion stability, high inertness, limiting the advantages of carbon fiber powder, etc., and achieve the effect of improving related performance.

Active Publication Date: 2014-10-08
KUNMING HENDERA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unmodified carbon fiber powder has less polar groups on the surface, high inertness, poor wettability and dispersion stability in solvents, poor interfacial bonding ability when compounded with the matrix, and more interfacial defects
These problems greatly limit the advantages of carbon fiber powder, so it is necessary to modify the carbon fiber powder

Method used

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  • Surface modification method for carbon fiber powder
  • Surface modification method for carbon fiber powder
  • Surface modification method for carbon fiber powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for modifying the surface of carbon fiber powder, comprising the steps of:

[0017] (1) Air burning pretreatment of carbon fiber powder: Weigh 100g of raw carbon fiber powder, place it in a 300ml porcelain crucible, put it in a muffle furnace, raise the temperature from room temperature to 350°C, and keep it warm for 5min;

[0018] (2) Immerse the pretreated carbon fiber powder in the oxidizing solution for surface modification: use a sulfuric acid solution with a molar concentration of 0.5mol / L to prepare a sodium chlorate-sulfuric acid oxidation solution with a molar concentration ratio of sodium chlorate and sulfuric acid of 1:1.0 Liquid 500ml; Weigh 40g of carbon fiber powder after step (1) pretreatment and put it into a 1000ml beaker, add 500ml sodium chlorate-sulfuric acid oxidation solution to make the mass concentration of carbon fiber powder be 80g / L; Heating to boiling, and reacting for 120min, then naturally cooling to room temperature;

[0019] (3)...

Embodiment 2

[0021] A method for modifying the surface of carbon fiber powder, comprising the steps of:

[0022] (1) Air burning pretreatment of carbon fiber powder: Weigh 100g of raw carbon fiber powder, place it in a 300ml porcelain crucible, put it into a muffle furnace, raise the temperature from room temperature to 500°C, and keep it warm for 20min;

[0023] (2) Immerse the pretreated carbon fiber powder in the oxidizing solution for surface modification: use a sulfuric acid solution with a molar concentration of 0.5mol / L to prepare a sodium chlorate-sulfuric acid oxidation solution with a molar concentration ratio of sodium chlorate and sulfuric acid of 1:1.0 Liquid 500ml; Weigh 40g of carbon fiber powder pretreated in step (1) and put it into a 1000ml beaker, add 500ml of sodium chlorate-sulfuric acid oxidation solution to make the mass concentration of carbon fiber powder 80g / L, and mix the oxidation solution with stirring Heating to boiling, and reacting for 120min, then naturally...

Embodiment 3

[0026] A method for modifying the surface of carbon fiber powder, comprising the steps of:

[0027] (1) Carry out air burning pretreatment on carbon fiber powder: weigh 100g of raw carbon fiber powder, put it in a 300ml porcelain crucible, put it into a muffle furnace, raise the temperature from room temperature to 400°C, and keep it warm for 10min;

[0028] (2) Immerse the pretreated carbon fiber powder into the oxidizing solution for surface modification: use a sulfuric acid solution with a molar concentration of 1.5mol / L to prepare potassium permanganate with a sulfuric acid molar concentration ratio of 1:2.0- Sulfuric acid oxidation solution 500ml; Weigh 20g of carbon fiber powder after step (1) pretreatment and put it into a 1000ml beaker, add 500ml potassium permanganate-sulfuric acid oxidation solution to make the mass concentration of carbon fiber powder be 40g / L; under stirring condition Heat the oxidizing solution to boiling, and react for 90 minutes, then naturally ...

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Abstract

The invention relates to a surface modification method for carbon fiber powder. The method comprises the following steps of performing air firing pretreatment on carbon fiber powder, immersing the pretreated carbon fiber powder in oxidized liquid for surface modification, and then cleaning the modified carbon fiber powder to obtain the surface modified carbon fiber powder. The modified carbon fiber powder has good solvent wettability and dispersion stability, and has good interface bonding capability when being combined with a base body.

Description

technical field [0001] The invention belongs to the technical field of material surface modification, in particular to the surface modification technology of carbon fiber powder. Background technique [0002] Carbon fiber powder, also called ground carbon fiber, is a powdery carbon material obtained by secondary processing of high-strength and high-modulus carbon fiber filaments with a carbon content of more than 85%. It retains many excellent properties of carbon fiber, and has a small shape, large specific surface area, and is easy to compound with the matrix resin. Unmodified carbon fiber powder has few polar groups on the surface, high inertness, poor wettability and dispersion stability in solvents, poor interfacial binding ability when composited with the matrix, and more interfacial defects. These problems greatly limit the advantages of carbon fiber powder, so it is necessary to modify the carbon fiber powder. Contents of the invention [0003] The object of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/30D06M11/55D06M11/50D06M101/40
Inventor 黄惠潘明熙郭忠诚
Owner KUNMING HENDERA SCI & TECH
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