Polyester/graphite nano-conductive composite material and its preparation method

A composite material, nano-conducting technology, applied in the fields of magnetic field/electric field shielding, chemical instruments and methods, electrical components, etc., can solve the problems of difficult recycling, limited industrial application, complex process, etc., to achieve simple process, broad industrialization prospects, low cost. The effect of the percolation threshold

Inactive Publication Date: 2007-01-31
YANGZHOU UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

Although the prepared conductive composites have low percolation threshold (below 5%) and high high conductivity (up to 10 -4 S / cm or more), but they all adopt the method of intercalation polymerization and solution intercalation. These two methods are difficult to recover due to the complex process and the use of a large amount of solvent in the solution method, which limits their industrial application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 1. Preparation of expanded graphite:

[0021] Add natural flake graphite with a particle size of 100 μm to 500 μm into a mixture of concentrated sulfuric acid and concentrated nitric acid with a mass ratio of 4:1 and soak for 24 hours, then wash and dry it, and put it in a horse at a temperature of 900-1100 ° C. Heat and expand in the Fu furnace to obtain expanded graphite with an expansion factor of more than 100 times for use.

[0022] 2. Preparation of nano-graphite:

[0023] The expanded graphite was dispersed in 70% ethanol aqueous solution and placed for 24 hours, and then ultrasonicated for 4 hours to obtain nano-graphite flakes, ready for use.

[0024] 3. Prepare the conductive composite material by method one:

[0025] Mix 2 to 40 parts of expanded graphite, 100 parts of main matrix polyester, and 5 to 60 parts of auxiliary matrix, and then add them to equipment that can provide shear force and heat the polymer to above the melting point at the same time (suc...

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PUM

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Abstract

The present invention relates to a polyester/gypsum nano electrical conductive composite material and its preparation method, belonging to the field of electrical conductive composite material preparation technology. It is formed from main base body polyester, auxiliary base body and gypsum according to the mixing ratio of 100:5-60:2-40. Said invention has lower percolation threshold (3-4%), and when the gypsum content is 4%, its conductivity can be upto 10 to the pwer-6 s/cm.

Description

technical field [0001] The invention relates to a preparation method of a conductive composite material. Background technique [0002] Polyester is a polymer with excellent comprehensive properties, widely used in fibers, films and engineering plastics. PET fiber ranks first in the production of synthetic fibers in the world due to its high strength, high elastic modulus, moderate resilience, good heat resistance and light resistance, and the fabric is washable and wearable. It is widely used in various fields of production and life. As a new engineering plastic, PBT is widely used in automobiles, electronics, electrical appliances and other fields due to its excellent mechanical properties, heat resistance and processing properties, and its development speed exceeds other engineering plastics. But polyester is an insulator, and its volume conductivity is in the range of 10 -16 Below S / cm, the antistatic performance is poor, and it is easy to accumulate static charges, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08K3/04C09K3/16H05K9/00
Inventor 张明李大军王文严长浩吴德峰刘磊
Owner YANGZHOU UNIV
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