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Water dispersible chopped carbon fiber and preparation method thereof

A technology of chopped carbon fiber and carbon fiber, which is applied in the direction of carbon fiber, fiber treatment, fiber type, etc., can solve the problems of poor cutting performance, achieve the effect of improving water dispersibility, high market application value, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon fiber coated with water-based compound sizing has improved dispersibility but poor cutting performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of water-dispersible carbon fiber, the carbon fiber directly enters the electrolytic cell, the electrolyte is ammonium bicarbonate of 1mol / L, and the current density is 0.3mA / cm 2 , the graphite rod is used as the negative electrode, the carbon fiber is used as the positive electrode, and the electrolysis time is 90s. After the electrochemical treatment, the carbon fiber passes through a washing tank, the water is tap water at normal temperature, and then dried in a drying oven at 100°C, and then sizing is carried out through a sizing tank. The method of dipping and sizing is adopted. The solid content of the sizing agent is 5wt%. The surface activity The agent is polyethylene glycol and polyoxyethylene lauryl ether (3:2, accounting for 2.5% of the descending agent content), the film-forming agent is starch aqueous solution (accounting for 10% of the descending agent content), antistatic agent and diffusing agent It is a mixture of alkyltrimethylamm...

Embodiment 2

[0027] A preparation method of water-dispersible carbon fiber, a preparation method of water-dispersible carbon fiber, the carbon fiber directly enters the electrolytic cell, the electrolyte is 1mol / L diammonium hydrogen phosphate, and the current density is 0.3mA / cm 2 , the graphite rod is used as the negative electrode, the carbon fiber is used as the positive electrode, and the electrolysis time is 90s. The electrochemically treated carbon fiber passes through a washing tank, the water is tap water at normal temperature, and then dried in a drying oven at 100°C, and then sizing is carried out through a sizing tank. The solid content of the sizing agent is 5wt%. The agent is Tween 60 (accounting for 2.0% of the content of the descending agent), the film-forming agent is polyvinyl acetate emulsion (accounting for 12% of the content of the descending agent), and the antistatic agent and diffusing agent are tetraethyleneamylamine and baking soda The mixed solution (accounting f...

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PUM

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Abstract

The invention discloses a water dispersible chopped carbon fiber and a preparation method thereof. The water dispersible chopped carbon fiber is prepared by carrying out electrochemical anodic oxidation treatment, sizing, drying and chopping sequentially. The carbon fiber provided by the invention has good collection properties, cuttability and water dispersibility, the contact angle with water is60-80 degrees, and the carbon fiber length is 2-12mm. The water dispersible carbon fiber provided by the invention has the advantages of simple treatment method, low production cost, and high marketapplication value. The chopped carbon fiber can be applied to wet papermaking process. The prepared carbon fiber paper or carbon fiber composite paper can be applied to electrode materials of fuel cells, electromagnetic shielding materials, electric heating materials, composite materials and other fields.

Description

technical field [0001] The technical field of carbon fiber treatment of the present invention, in particular, relates to a water-dispersible chopped carbon fiber and a preparation method thereof. Background technique [0002] Carbon fiber-reinforced composite materials prepared by dispersing carbon fibers in a matrix resin have good properties in terms of light weight, mechanical properties, dimensional stability, and electrical conductivity. Therefore, such composite materials are widely used in fields such as automobiles, airplanes, electrical or electronic devices, optical instruments, precision instruments, recreational toys and games, home or office supplies, building materials, and the like. The demand for this composite material is increasing year by year. At the same time, paper or composite paper containing carbon fiber has also been rapidly developed in the fields of electric heating and electromagnetic wave shielding. One of the ways to obtain this carbon fiber ...

Claims

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Application Information

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IPC IPC(8): D06M15/53D06M15/11D06M13/46D06M13/402D06M15/333D06M13/325D06M11/76C25D11/02C25D7/06D06M101/40
CPCC25D7/0607C25D11/02D06M11/76D06M13/3255D06M13/402D06M13/46D06M15/11D06M15/333D06M15/53D06M2101/40D06M2200/40
Inventor 邓文彬黄翔宇王彪王永梅沈海娟
Owner CHINA PETROLEUM & CHEM CORP