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One-step chemical preparation method for graphene and polyaniline composite materials

A composite material, polyaniline technology, applied in the field of one-step chemical preparation of graphene/polyaniline conductive composite materials, can solve the problems of toxicity of hydrazine hydrate reducing agent, difficulty in industrial production, complicated preparation process, etc., to save preparation cost , reduced operation steps, simple synthesis method

Inactive Publication Date: 2014-12-17
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the preparation process of the graphene / polyaniline composite material is complicated, the reaction time is long, the hydrazine hydrate reducing agent used is toxic, and it is difficult to realize industrial production. A graphene / polyaniline composite material is provided. One-step chemical preparation of composite materials

Method used

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Examples

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Effect test

Embodiment 1

[0023] A one-step chemical preparation method of graphene / polyaniline composite material: add 50 mg of graphite oxide into 100 ml of acetic acid aqueous solution, fully stir and dissolve, prepare a graphite oxide-acetic acid solution with a concentration of 0.5 mg / ml, and then add 2.5 g of aniline monomer (The mass ratio of graphite oxide and aniline is 1:50), and ultrasonically disperse for 15 minutes to mix the graphite oxide and aniline monomer evenly. Then add 2ml of hydroiodic acid aqueous solution reducing agent (the volume ratio of hydroiodic acid to acetic acid is 1:50) to the graphite oxide / aniline mixed solution, and slowly add 12.5g of ammonium persulfate aqueous solution with a mass fraction of 10% (per The mass ratio of ammonium sulfate to aniline is 1:2), and the magnetic stirring is continued. The polymerization reaction was carried out in an ice bath at 0°C for 4h. After the reaction was finished, the product was suction-filtered, washed repeatedly with deioni...

Embodiment 2

[0025] A one-step chemical preparation method of graphene / polyaniline composite material: add 200mg of graphite oxide into 100ml of acetic acid aqueous solution (concentration is 38%), fully stir and dissolve, prepare graphite oxide-acetic acid solution with a concentration of 2mg / ml, and then add 5g of aniline monomer (the mass ratio of graphite oxide and aniline is 1:25), and ultrasonically disperse for 60min, so that the graphite oxide and aniline monomer are evenly mixed. Then add 3.3ml of hydroiodic acid reducing agent aqueous solution (the volume ratio of hydroiodic acid to acetic acid is 1:30) to graphite oxide / aniline mixed solution, and slowly add 33g of ammonium persulfate aqueous solution (per The mass ratio of ammonium sulfate to aniline is 2:1), and the magnetic stirring is continued. The polymerization reaction was carried out in a water bath at 30°C for 12h. After the reaction was finished, the product was suction-filtered, washed repeatedly with deionized wate...

Embodiment 3

[0027] A one-step chemical preparation method of graphene / polyaniline composite material: add 500mg of graphite oxide into 100ml of acetic acid aqueous solution (concentration is 37%), fully stir and dissolve, prepare graphite oxide-acetic acid solution with a concentration of 5mg / ml, and then add 2.5g of aniline monomer (mass ratio of graphite oxide and aniline is 1:5), and ultrasonically disperse for 120min to mix graphite oxide and aniline monomer evenly. Then add 10ml of hydroiodic acid aqueous solution reducing agent (volume ratio of hydroiodic acid aqueous solution to acetic acid aqueous solution is 1:10) in graphite oxide / aniline mixed solution, and slowly add 25g mass fraction to be 50% ammonium persulfate aqueous solution ( The mass ratio of ammonium persulfate to aniline is 5:1), and the magnetic stirring is continued. The polymerization reaction was carried out in a water bath at 60°C for 24h. After the reaction was finished, the product was suction-filtered, washe...

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Abstract

The invention discloses a one-step chemical preparation method for graphene and polyaniline composite materials. Hydroiodic acid is served as reductive agent, graphite oxide is served as dopant, and graphite oxide reduction and aniline polymerization are achieved in one step in an acid medium to prepare the graphene and polyaniline composite materials. The one-step chemical preparation method for the graphene and polyaniline composite materials comprises dissolving the graphite oxide into an acetic acid solution, adding aniline monomers, uniformly mixing through ultrasonic dispersion, adding reducing agent hydroiodic acid and dropwise adding ammonium persulfate oxidizing agent, magnetic stirring, achieving aniline in situ polymerization and filtering, washing and drying after complete reaction to obtain the graphene and polyaniline composite materials. According to the one-step chemical preparation method for the graphene and polyaniline composite materials, the graphite oxide in the graphene and polyaniline composite materials is fully restored, generated polyaniline nano-particles are dispersed between graphene sheets, the composition method is simple, the reaction time is short, the composite materials are high in specific surface area and good in reactivity and are conductive composite materials with good flexibility and conductivity.

Description

technical field [0001] The invention relates to a preparation method of a graphene and polyaniline conductive composite material, in particular to a graphene / polyaniline conductive composite material prepared by a one-step chemical method using graphite oxide as a dopant and hydroiodic acid as a reducing agent Methods. Background technique [0002] Graphene is composed of a layer of sp 2 A two-dimensional material composed of carbon atoms arranged in a hexagonal lattice, with a thickness of only 0.34nm, has unique physical and chemical properties, such as good electrical conductivity, high carrier mobility, high light transmittance and excellent mechanical properties Wait. In recent years, many researchers have combined graphene with conductive polymer materials, and have been widely used in supercapacitors, electrochromic, biological and chemical sensors, solar cells and other fields. Among them, the preparation of graphene / polyaniline composite materials has gradually b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/04C08L79/02
Inventor 秦琦张锐焦明立李雨恒何方
Owner ZHONGYUAN ENGINEERING COLLEGE
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