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Nanomter conducting composite polyester/graphite material and its preparation

A composite material and nano-conductive technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of limited industrial application, complicated process, difficult recycling, etc., and achieve broad industrialization prospects, simple process, and low percolation The effect of the threshold

Inactive Publication Date: 2009-07-22
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

[0023] 1. Preparation of expanded graphite:

[0024] 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, and then wash and dry it in a muffle at a temperature of 900 to 1100 ° C. Heat and expand in the furnace to obtain expanded graphite with an expansion factor of more than 100 times for use.

[0025] 2. Preparation of nano-graphite:

[0026] The expanded graphite was dispersed in 70% ethanol aqueous solution for 24 hours, then ultrasonicated for 4 hours, and then used.

[0027] 3. Preparation of epoxy resin modified graphite 1:

[0028] Dissolve 1-15 parts of epoxy resin in 100-400ml of acetone, add 2-30 parts of the above-mentioned expanded graphite, stir for 2 hours, let the acetone volatilize naturally, and put it into the oven after most of the acetone has volatilized All the acetone was removed by drying at 80°C to obtain epoxy res...

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PUM

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Abstract

A polyester / graphite nano conductive composite material and a preparation method thereof relate to a preparation method of a conductive composite material. It is composed of polyester, epoxy resin and expanded graphite with an expansion ratio of more than 100 times. The mass ratio of polyester, epoxy resin and expanded graphite with an expansion ratio of more than 100 times is: 100:1-15:2-30. The invention has a lower percolation threshold (3-4%), and the electrical conductivity can reach more than 10-4S / cm, and has better antistatic property. Due to the low filling amount of the conductive filler, the invention basically maintains the excellent mechanical properties and processing properties of the polyester, and is expected to be widely used in the fields of antistatic materials, electromagnetic shielding materials, and microwave absorption.

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 Patents(China)
IPC IPC(8): C08L67/03C08K3/04C08L63/00H01B1/24
Inventor 张明李大军王文严长浩吴德峰刘磊
Owner YANGZHOU UNIV