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Ag/graphene nanometer conductive compound material and preparation method thereof

A composite material and nano-conductive technology, which is applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of restricting the performance of nanoparticles and local agglomeration, and achieve the effects of convenient operation, mild reaction conditions and good production prospects

Inactive Publication Date: 2011-07-27
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the particle size enters the nanoscale, due to the large specific surface area of ​​the nanoscale particles, local agglomeration is easy to occur, which seriously restricts the performance of the nanoparticles.

Method used

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  • Ag/graphene nanometer conductive compound material and preparation method thereof
  • Ag/graphene nanometer conductive compound material and preparation method thereof
  • Ag/graphene nanometer conductive compound material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of graphite oxide: Slowly add 1g of 200 mesh graphite powder into a 500ml beaker containing 23ml of concentrated sulfuric acid under stirring, keep the temperature at 0°C, then slowly add 0.5g of sodium nitrate and 3g of potassium permanganate The mixture was stirred and reacted at 0°C for 2 hours, then kept in a constant temperature water bath at 35°C for 30 minutes under stirring, slowly added 46ml of water to raise the temperature to 98°C, and maintained at this temperature for 15 minutes; dilute to 140ml with warm water, Pour a certain amount of H 2 o 2 , at this time the color of the solution turned bright yellow, filtered while hot, fully washed the filter cake with 5% HCl until there was no SO in the filtrate 4 2- (with BaCl 2 solution detection), anhydrous CaCl at 50°C 2 In the presence of vacuum drying for 24h, ground to obtain graphite oxide powder.

[0041] (2) Add 150 mg of graphite oxide prepared above to 150 ml of distilled water, ultr...

Embodiment 2

[0044] (1) The preparation of graphite oxide is the same as in Example 1.

[0045] (2) Add 150 mg of graphite oxide prepared above to 150 ml of distilled water, ultrasonically disperse for 1 h, and then add 0.0071 g of AgNO 3 , continue to sonicate for 30min. Under the condition of water bath at 80℃, add 1.5g NaBH with stirring 4 , Reflux reaction 2h. The reactant was suction filtered while it was hot, and after washing until the filtrate was neutral, the product was air-dried at 35° C. for 24 hours and ground to obtain the target product—Ag / graphene nano-conductive composite material.

[0046] The conductivity of the Ag / graphene nanoconductive composite is 1.64S / cm.

Embodiment 3

[0048] (1) The preparation of graphite oxide is the same as in Example 1.

[0049] (2) Add 150 mg of graphite oxide prepared above to 150 ml of distilled water, ultrasonically disperse for 1 h, and then add 0.0120 g of AgNO 3 , continue to sonicate for 30min. Under the condition of water bath at 80℃, add 1.5g NaBH with stirring 4 , Reflux reaction 2h. The reactant was suction filtered while it was hot, and after washing until the filtrate was neutral, the product was air-dried at 35° C. for 24 hours and ground to obtain the target product—Ag / graphene nano-conductive composite material.

[0050] The conductivity of the Ag / graphene nanoconductive composite is 1.73S / cm.

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Abstract

The invention provides a novel nanometer silver particle / graphene conductive compound material, which belongs to the technical field of compound materials. The preparation method of the material comprises the following steps of: ultrasonically dispersing oxidized graphite in water for 1 to 2 hours, adding silver nitrate solid, keeping ultrasonically dispersing for 25 to 30 minutes, raising the temperature to 70 to 80 DEG C, adding sodium borohydride for reflux reaction for 1 to 2 hours, thermally filtering, washing, drying and grinding to obtain the Ag / graphene nanometer conductive compound material. The Ag / graphene nanometer conductive compound material can be prepared by a one-step reduction method, which is simple in process, convenient in operation, mild in reaction and high in production efficiency; in the prepared conductive compound material, the nanometer silver particles are uniformly absorbed on the edge of the graphene so as to form a conductive network where Ag and the graphene are staggered mutually; therefore, the dispersion of the nanometer silver particles is improved, and the thermal stability and the conductivity of the graphene are enhanced; and the Ag / graphene nanometer conductive compound material has a good industrial production prospect.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a noble metal nanoparticle / graphene nano conductive composite material, in particular to a conductive composite material with graphene as the main body and nano silver particles as the doping phase. The invention also relates to a preparation method of the Ag / graphene nanometer conductive composite material. Background technique [0002] In 2004, the research group of Andre K. Geim (Andre K. Geim) at the University of Manchester in the United Kingdom discovered and successfully prepared graphene, which opened the prelude to the research of two-dimensional carbonaceous materials and caused a new global interest. Research boom. [0003] Nanoscale particles have quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect, so they exhibit many unique properties and have broad application prospects in electrical conduction, catalysis, lig...

Claims

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Application Information

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IPC IPC(8): H01B1/04H01B13/00
Inventor 莫尊理刘鹏伟赵永霞郭瑞斌冯超邓哲鹏
Owner NORTHWEST NORMAL UNIVERSITY
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