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Nano graphite high conductivity composite material and preparation method

A nano-graphite, high-conductivity technology, applied in conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as low conductivity of polymers

Inactive Publication Date: 2012-11-21
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of low polymer conductivity, combined with the characteristics of nano-graphite, to provide a high-conductivity light polymer composite material containing nano-graphite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Graphite oxide 0.1g dispersed in 50mlH 2 O, sonicate for 3h, dissolve 5g of methylolacrylamide in 50mlH 2 O, in-situ polymerization after mixing the solution (initiator: ammonium persulfate 0.005g): react under nitrogen protection at 70°C for 10 hours to obtain a polymer gel, take 20g of the obtained gel, and reduce it with 50ml of hydrazine hydrate at 100°C for 24 hours, precipitated with acetone, filtered to wash off the reducing agent, and dried in a vacuum oven at 30°C for 24 hours.

[0038] The volume conductivity of the above-mentioned polymer composite material can reach 5.8*10 -4 S / cm.

Embodiment 2

[0040] Disperse 0.1g graphite oxide in 50ml H 2 O, sonicate for 3h, dissolve 5g of acrylamide in 50ml of H 2 O, in-situ polymerization after mixing the solutions (initiator: ammonium persulfate 0.005 g): 65 °C under nitrogen protection for 10 hours to prepare a polymer gel, take 5 g of the prepared gel, and reduce it with 50 ml of hydrazine hydrate at 100 °C for 24 hours, precipitated with acetone, filtered to wash off the reducing agent, and dried in a vacuum oven at 30°C for 24 hours.

[0041] The volume conductivity of the above-mentioned polymer composite materials can reach 1.2*10 -4 S / cm.

Embodiment 3

[0043] Disperse 0.1g graphite oxide in 50ml H 2 O, ultrasonic treatment for 3h, polyethylene glycol 5g dissolved in 25ml H 2 O, the solutions were mixed and reduced with 50ml of hydrazine hydrate at 100°C for 24 hours, precipitated with acetone, filtered, washed to remove the reducing agent, and dried in a vacuum oven at 30°C for 24 hours.

[0044] The volume conductivity of the above-mentioned polymer composite material can reach 7.9*10 -2 S / cm.

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PUM

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Abstract

The invention discloses a high-conductivity composite material made of nano graphite, which consists of the following components in weight percentage: 80 to 99 percent of polymer matrix, and 1 to 20 percent of the nano graphite. The nano graphite has high radius-thickness ratio; and less nano graphite can be used for forming an effective conducting network in a polymer, while low content of nano graphite conductive stuffing can make a conductive polymer material keep the prior good mechanical property. The high-conductivity composite material made of the nano graphite has a volume conductivity up to 2.5 x 10<-1> S / cm, and has excellent properties of low stuffing amount and high conductivity compared with the prior natural graphite and expansion graphite conductive composite materials.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a high-conductivity composite material containing nano-graphite and a preparation method thereof. Background technique [0002] The conductivity of most polymers is very low, and the conductivity of polymers is usually increased by adding a certain amount of conductive material, which is connected by conductive fillers to form a conductive path, so that the polymer material has a certain degree of conductivity. In the prior art, the conductive fillers are mostly natural graphite, expanded graphite, carbon black, acetylene black, etc. The conductive fillers used in the system have a large filling amount and a high percolation threshold, which greatly damages the strength and toughness of the composite material, and leads to Decrease in processability of conductive composites. At present, the volume conductivity of nitrile rubber / expanded graphite composites is only 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/26C08L33/04C08L31/04C08L29/04C08L39/06C08K3/04H01B1/24
Inventor 赵超越庞斌杜宁陈桥吴刚
Owner TORAY FIBER RES INST(CHINA) CO LTD