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Preparation method of graphene-nano silver dispersion liquid

A graphene suspension and graphene technology, applied in the direction of graphene, nano-carbon, nanotechnology, etc., can solve the problems of difficult repair, loss of electrical conductivity, and difficulty in meeting the requirements of electrical properties of composite materials, and achieve structural integrity and electrical conductivity. The effect of excellent performance

Inactive Publication Date: 2017-06-30
湖南利德电子浆料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphene oxide loses its good electrical conductivity due to the presence of oxygen-containing groups, and this defect is difficult to repair, so the electrical properties of the composite material prepared by this method are difficult to meet the requirements, and the use of pure graphene is not conducive to Adsorption and dispersion of nanoparticles

Method used

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Examples

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Embodiment 1

[0020] Graphite powder and STC with a mass ratio of 1:1 were mixed and added to DMF to prepare a 0.01 mg / ml (graphite powder) mixture, and the temperature was raised to 100°C for 1 h in a 400W ultrasonic vessel. After cooling, take the solution and centrifuge it for 60min under the condition of 4000r / min, and take the supernatant as graphene dispersion. Silver nitrate and PVP with a mass ratio of 1:1 were mixed and added to deionized water to prepare 0.05mg / ml (AgNO 3 ) solution, mix the silver nitrate solution and the graphene dispersion at a volume ratio of 1:1, stir evenly and place it in a microwave reactor with a power of 300W for 5min, take it out and add 0.1g dropwise at a stirring rate of 100r / min / ml of sodium hydroxide solution to adjust the pH to 10, ultrasonically stirred for 30 minutes; warmed up to 60°C, and slowly added dropwise a glucose solution with a volume ratio of 1:10 and a concentration of 1g / ml under the condition of ultrasonic stirring; constant temper...

Embodiment 2

[0022] Graphite powder and STC with a mass ratio of 1:1 were mixed and added to DMF to prepare a 0.1 mg / ml (graphite powder) mixture, and the temperature was raised to 100°C for 1 h in a 400W ultrasonic vessel. After cooling, take the solution and centrifuge it for 60min under the condition of 4000r / min, and take the supernatant as graphene dispersion. Silver nitrate with a mass ratio of 1:2 was mixed with PVP and added to deionized water to prepare 0.05mg / ml (AgNO 3 ) solution, mix the silver nitrate solution and the graphene dispersion at a volume ratio of 2:3, stir evenly and place it in a microwave reactor with a power of 300W for 5 minutes, take it out and add 0.1g dropwise at a stirring rate of 100r / min / ml of sodium hydroxide solution to adjust the pH to 10, ultrasonically stirred for 30 minutes; warmed up to 60°C, and slowly added dropwise a glucose solution with a volume ratio of 1:10 and a concentration of 1g / ml under the condition of ultrasonic stirring; constant te...

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Abstract

The invention belongs to the field of nano material functional material, particularly refers to a preparation method of a graphene-nano silver dispersion liquid. The preparation method comprises the steps of (1) preparing a graphene suspension liquid by liquid phase, (2) separation and purification of graphene dispersion liquid, (3) preparation of graphene-nano silver seed crystal liquid, and (4) chemical reduction preparation of graphene-nano silver dispersion liquid. The preparation method of the graphene-nano silver dispersion liquid has the advantages that the surface effect of the nano material is utilized, the adsorption effect makes nano-silver particles preferentially adsorbed on the surface of a graphene sheet layer, so that the graphene-nano silver dispersion liquid with good electrical conductivity and good dispersion is prepared, and the preparation method of the graphene-nano silver dispersion liquid is simple in procedure, easy to operate and high in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a preparation method of a graphene-nanometer silver dispersion liquid. Background technique [0002] Metal silver has excellent physical and chemical properties, such as the best room temperature electrical conductivity, thermal conductivity, the cheapest noble metal resistant to high temperature oxidation, the strongest reflective properties, photosensitive imaging properties, and antibacterial and anti-inflammatory properties, making it widely used in modern industrial field. Due to the small particle size and high activity of nano-silver powder, the special chemical and physical properties exhibited by nano-silver powder, and its potential application value in optoelectronics, SERS substrates, optical labels, near-field optical probes and other fields have attracted much attention. Attention, with the light, small and thin trend of the conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00C01B32/184
CPCB22F9/24B82Y40/00
Inventor 刘飘宁天翔宁文敏胡蔚
Owner 湖南利德电子浆料股份有限公司
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