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Polyamide/nano expanded graphite/carbon fiber high-strength conducting composite material and preparation method thereof

A technology of nano-expanded graphite and conductive composite materials, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of restricting industrial applications and declining mechanical properties, and achieve excellent mechanical properties, improved impact strength, and excellent The effect of conductivity

Inactive Publication Date: 2010-11-03
YANGZHOU UNIV
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Problems solved by technology

However, with the addition of graphite, the mechanical properties of the polyamide / graphite nano-conductive composite material prepared by this method are lower than those of the pure polyamide matrix, which also limits its industrial application.

Method used

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  • Polyamide/nano expanded graphite/carbon fiber high-strength conducting composite material and preparation method thereof

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Embodiment Construction

[0017] 1. Preparation of expanded graphite:

[0018] Add natural flake graphite with a particle size of 100 μm to 500 μm (fineness of 30 to 200 mesh) into a mixture of concentrated sulfuric acid and concentrated nitric acid with a mass ratio of 4:1 and soak for 24±3 hours, then wash and dry Finally, heat and expand in a muffle furnace at a temperature of 900-1100° C. to obtain expanded graphite with an expansion ratio of more than 100 times, which is then used for future use.

[0019] 2. Preparation of nano-graphite:

[0020] Disperse the expanded graphite in 70% ethanol aqueous solution and place it for 24 ± 1 hour, then sonicate for 4 ± 0.2 hours to obtain nano-graphite sheets (or called nano-graphite or nano-expanded graphite) for future use.

[0021] 3. Pre-blending of composite materials

[0022] Put a certain ratio of nano-expanded graphite and the main matrix in a high-speed mixer, and stir for 10 minutes to make the filler nano-expanded graphite evenly dispersed in t...

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Abstract

The invention relates to a polyamide / nano expanded graphite / carbon fiber high-strength conducting composite material and a preparation method thereof. The composite material contains the following components of 100 parts of main substrate polyarylether, 1-6 parts of expanded graphite of which the expansion ratio is more than 100 times, and 1-20 parts of reinforcer carbon fiber. The reinforcer carbon fiber is added to a polyamide / nano expanded graphite compound system to prepare the high-strength high-conductivity composite material. Although the content of the carbon fiber and the expanded graphite is small, the bulk conductivity of the system can reach 10-2S / m, the mechanical properties of the system are excellent, the tensile strength can reach 120.34 MPa, the bending strength reaches 195.51 MPa, and the impact strength is 37.33 KJ / m<2>. The invention has excellent over-all properties, thereby having broad industrialization prospects. The invention is expected to be widely used in the fields of anti-static materials, electromagnetic shielding materials, microwave absorption and the like.

Description

technical field [0001] The invention relates to a preparation process and related performance research of a polyamide / nano-expanded graphite / carbon fiber high-strength conductive composite material. On the basis of the preparation method of the polyamide / graphite nano-conductive composite material, carbon fibers are added through simple melt blending and intercalation A polyamide / nano-expanded graphite / carbon fiber high-strength conductive composite material with good electrical conductivity and excellent mechanical properties was prepared by the method. Background technique [0002] In recent years, polymer-based conductive composites have been widely promoted and applied due to their advantages such as low density, excellent electrical conductivity, and good chemical corrosion resistance. However, according to current reports, the conductive composite materials with polymer as the matrix mostly use carbon black, metal powder, metal oxide, etc. as conductive fillers, and ad...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K7/24C08K7/06C08K3/04H01B1/24
Inventor 张明曹振东李满
Owner YANGZHOU UNIV
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