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A surface modification method for carbon fiber to quickly attach double-phase layer carbon nanotubes

A carbon nanotube and surface modification technology, which is applied in the field of micro-nano materials to achieve the effects of simple implementation method, increased surface roughness, and better performance.

Active Publication Date: 2019-08-27
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology

[0008] Aiming at the shortcomings of the existing carbon nanotube modified carbon fiber technology, the present invention provides a carbon fiber surface modification method with good comprehensive effect and easy preparation

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  • A surface modification method for carbon fiber to quickly attach double-phase layer carbon nanotubes

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Embodiment Construction

[0021] Mix carbon nanotubes with an appropriate amount of working fluid and press them into electrodes with a certain shape. Put two carbon nanotube electrodes opposite each other, leaving a gap of 1-2 mm in the middle. After sizing the carbon fiber monofilament, when the slurry is not completely dry Pass through the gap between the opposite carbon nanotube electrodes at a certain speed. The carbon fiber monofilament passing through the electrode gap can be single or multiple at a certain distance. The carbon fiber can never touch the carbon nanotube electrode in the above process; the carbon fiber single Wire and carbon nanotube electrodes are connected to high voltage to make the carbon fiber monofilament in the gap discharge the carbon nanotube electrodes on both sides, wherein the high voltage can be direct current or alternating current, the lower limit of voltage should be enough to generate spark discharge, and the upper limit of voltage should be above No damage to carb...

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Abstract

The invention discloses a surface modification method of carbon fiber fast-attached double-phase layer carbon nanotubes, and belongs to the field of new materials. The method comprises the following steps: (1) carbon nanotubes are mixed with an appropriate amount of a working medium, and the obtained mixture is pressed to form an electrode with a certain morphology; (2) two carbon nanotube electrodes are opposed, and a gap of 1-2mm is left between the two carbon nanotube electrodes; (3) carbon fiber monofilaments are sized; (4) the sized carbon fiber monofilaments go through the gap between the opposite carbon naotube electrodes at a certain speed; (5) the carbon fiber monofilaments and the carbon nanotube electrodes are accessed to carbon fiber monofilaments in the gap to discharge electricity to the carbon nanotubes at two sides of the carbon nanofiber electrodes; and (6) the carbon fibers for adhering the carbon nanotubes are dried to a sizing agent. The whole method is simple, has a good industrial basis, and allows the carbon fiber composite material with good performances to be prepared.

Description

[0001] Technical field: [0002] The invention belongs to the field of micro-nano materials, and in particular relates to a method for physically modifying carbon fibers by carbon nanotubes. [0003] Background technique: [0004] In order to enhance the interfacial strength and fatigue resistance of carbon fiber in the matrix material, carbon nanotubes with excellent mechanical and thermal properties are attached to the surface of carbon fiber by physical or chemical means to increase the surface roughness of carbon fiber and the bond with the matrix material. Intensity, is considered a proven method. In order to achieve the above purpose, a variety of implementation methods have been successively developed and developed; among them, direct growth method, electrophoresis method and chemical grafting method are typical representatives. [0005] Specifically, the direct growth method uses carbon fibers as the substrate, with catalysts on the surface, and often uses chemical vap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M10/06D06M101/40
Inventor 何燕李少龙敬成伟
Owner QINGDAO UNIV OF SCI & TECH
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