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Preparation method of conductive graphene/zinc aluminium oxide composite

A conductive composite material, aluminum-doped zinc oxide technology, applied in the direction of graphene, zinc oxide/zinc hydroxide, nano-carbon, etc., can solve the problems of high production cost, achieve low cost, good treatment effect, simple process effect

Active Publication Date: 2014-07-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above two methods both use hydrazine hydrate to reduce graphite oxide to prepare graphene. In addition, both use organic reagent ethylene glycol (ether) as the dispersion medium, and the production cost is expensive.

Method used

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  • Preparation method of conductive graphene/zinc aluminium oxide composite
  • Preparation method of conductive graphene/zinc aluminium oxide composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Disperse 10.0 grams of graphite oxide into 1000 ml of deionized water, freeze at -15°C for 12 hours, heat at 80°C until the ice cubes basically melt, and ultrasonicate for 30 minutes at a frequency of 20KHz. Obtained graphene oxide dispersion;

[0025] 2. Add 10.6 grams of zinc sulfate and 1.5 grams of aluminum sulfate to the graphene oxide dispersion prepared in step 1, stir for 40 minutes at a temperature of 60 ° C, and then dropwise add 0.5 mol / liter of ammonium carbonate solution When the pH value of the system is 6, aging for 60 minutes, filtering and washing, the graphene oxide / ZAO precursor composite is obtained; under nitrogen atmosphere, the obtained precursor composite is calcined at 800°C for 5 hours, pulverized, and obtained Graphene / ZAO conductive composite powder; its volume resistivity is measured to be 9.71×10 -2 Ω·cm.

[0026] In order to verify the graphene oxide product obtained in step 1, the graphene oxide dispersion liquid obtained in this ste...

Embodiment 2

[0028] 1. Disperse 25 grams of graphite oxide into 500 ml of deionized water, freeze at -1°C for 24 hours, heat at 75°C until the ice cubes basically melt, and ultrasonicate for 60 minutes at a frequency of 40KHz. Obtained graphene oxide dispersion;

[0029] 2. Add 41.9 grams of zinc chloride and 1.1 grams of aluminum chloride to the graphene oxide dispersion prepared in step 1, stir for 20 minutes at a temperature of 80 ° C, and then dropwise add 3.0 mol / liter of carbonic acid ammonium solution until the pH value of the system is 8, aging for 30 minutes, filtering, and washing to obtain a graphene oxide / ZAO precursor composite; under a nitrogen atmosphere, the resulting precursor composite is calcined at 900°C for 1 hour, pulverized, Graphene / ZAO conductive composite powder was prepared; its volume resistivity was measured to be 2.79×10 -2 Ω·cm.

Embodiment 3

[0031] 1. Disperse 12.5 grams of graphite oxide into 500 ml of deionized water, freeze at -10°C for 18 hours, heat at 80°C until the ice cubes basically melt, and ultrasonicate for 45 minutes at a frequency of 30KHz. Obtained graphene oxide dispersion;

[0032]2. Add 29.7 grams of zinc nitrate and 0.7 grams of aluminum chloride to the graphene oxide dispersion prepared in step 1, stir for 30 minutes at a temperature of 75 ° C, and then dropwise add 1.75 mol / liter of ammonium carbonate Solution until the pH value of the system is 7.5, aging for 45 minutes, filtering, and washing to obtain a graphene oxide / ZAO precursor compound; under a nitrogen atmosphere, calcinate the obtained precursor compound at 870 ° C for 3 hours, pulverize, and prepare Graphene / ZAO conductive composite powder was obtained; its volume resistivity was measured to be 4.72×10 -2 Ω·cm.

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Abstract

The invention belongs to the field of novel micro-nanomaterial preparation, relates to a conductive composite and in particular relates to a preparation method of a conductive graphene / zinc aluminium oxide composite coating. The preparation method specifically comprises the steps of firstly cold-stripping graphite oxide to prepare graphene oxide; secondly loading aluminium and alkali containing zinc carbonate on the surface of graphene oxide; finally carrying out high-temperature treatment under the condition of nitrogen to prepare the conductive graphene / zinc aluminium oxide (graphene / ZAO) composite. The preparation method is simple and convenient, and the product has excellent conductivity.

Description

technical field [0001] The invention relates to a conductive composite material, in particular to a method for preparing a graphene / aluminum-doped zinc oxide conductive composite coating, and belongs to the field of novel micro-nano materials and material preparation. Background technique [0002] Conductive powder is often added to polymer materials such as engineering plastics, rubber and coatings to make them have special functions such as antistatic, electromagnetic shielding and anti-corrosion. At present, the conductive fillers used in the market are mainly metal-based, carbon-based and metal oxides. Metal-based fillers have strong electrical conductivity, but apart from silver, aluminum and copper are easily oxidized and have poor corrosion resistance, while silver powder is restricted by its high price. In addition, metal powder is easy to sink and agglomerate due to its large specificity, and it is difficult to control the dispersion in practical applications. Due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B31/04C01B32/184
Inventor 姚超左士祥马建锋刘文杰张林李霞章罗士平孔泳毛辉麾
Owner CHANGZHOU UNIV
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