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Graphene -organic acid doped polyaniline composite material and preparation method thereof

A composite material and graphene technology, which is applied in the field of organic and inorganic conductive composite materials, can solve the problems of affecting material properties and uneven composite materials, and achieve the effects of low equipment requirements, improved electrochemical performance, and short production cycle.

Active Publication Date: 2010-07-21
NANJING UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

Chinese patents CN1887965A and CN100441634 respectively prepared composite materials on carbon nanotubes by in-situ deposition or electrodeposition of polyaniline or other conductive polymers. The materials have better electrochemical properties than single-component materials, but the composites are Prepared from an aqueous solution, the unevenness of the compound will also affect the full play of the properties of the two-component material

Method used

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  • Graphene -organic acid doped polyaniline composite material and preparation method thereof
  • Graphene -organic acid doped polyaniline composite material and preparation method thereof
  • Graphene -organic acid doped polyaniline composite material and preparation method thereof

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preparation example Construction

[0016] Graphene-organic acid doped polyaniline composite material of the present invention and preparation method thereof, the steps are as follows:

[0017] In the first step, graphite oxide is added to the dispersant for ultrasonic dispersion to form a uniformly dispersed graphene oxide mixture;

[0018] In the second step, at room temperature, add aniline monomer to the mixed solution obtained in the first step, continue ultrasonic dispersion to form a mixed solution, and then stir for a certain period of time;

[0019] In the third step, the solution of the dispersant of the oxidizing agent and the organic doping acid is added dropwise to the mixed solution obtained in the second step, and the polymerization is stirred;

[0020] The fourth step is to centrifuge and wash the mixed solution obtained in the third step to obtain a graphene oxide-polyaniline composite material;

[0021] Step 5, adding concentrated alkali to the aqueous suspension of the above product, heating ...

Embodiment 1

[0026] The preparation method of graphene-organic acid doped polyaniline composite material of the present invention, the steps are as follows:

[0027] In the first step, add 5mg of graphite oxide to 40mL of ethylene glycol and ultrasonically disperse to form a uniformly dispersed graphene oxide mixture, ultrasonically for 20-120min;

[0028] In the second step, 0.46 mL of aniline monomer is added to the product of the second step, dispersed by ultrasonication for 10-60 minutes to form a mixed solution, and then stirred for 30-120 minutes.

[0029] In the third step, 10 mL of an ethylene glycol solution of 1.141 g of ammonium persulfate and 2.32 g of camphorsulfonic acid was added dropwise to the system obtained in the second step at 0°C, and the stirring was continued for 1 h.

[0030] In the fourth step, the mixed solution obtained in the third step is centrifuged, and washed repeatedly with ethanol and water to obtain a graphene oxide-polyaniline composite material.

[00...

Embodiment 2

[0041] The preparation method of graphene-organic acid doped polyaniline composite material of the present invention, the steps are as follows:

[0042] In the first step, add 1.1mg of graphite oxide to 50mL of ethanol and ultrasonically disperse to form a uniformly dispersed graphene oxide mixture, ultrasonically for 20-120min;

[0043] In the second step, 1.1 mL of aniline monomer is added to the product of the second step, dispersed by ultrasonication for 10-60 minutes to form a mixed solution, and then stirred for 30-120 minutes.

[0044] In the third step, 10 mL of an ethanol solution of 1.37 g of ammonium persulfate and 2.78 g of camphorsulfonic acid was added dropwise to the system obtained in the second step at 10° C., and the stirring was continued for 15 min.

[0045] The fourth step is the same as step four in Example 1.

[0046] Step 5: Add NaOH to the 50 mL aqueous suspension of the above product to make the concentration 8 mol / L, heat and stir at 80°C for 1 h; ...

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Abstract

The invention discloses graphene-organic acid doped polyaniline composite material and a preparation method thereof. The preparation method includes the following steps: adding graphite oxide to dispersing agent for ultrasonic dispersion to form evenly dispersed graphene oxide liquid mixture; adding aniline monomer to the liquid mixture obtained in the first step for further dispersion under room temperature to form liquid mixture, and then blending for certain time; gradually dripping oxidizer and organic doping acid to the liquid mixture obtained in the second step, and blending for polymerization; centrifuging the liquid mixture obtained in the third step, and washing to get graphene oxide-polyaniline composite material; adding concentrated alkaline to the water suspension of the graphene oxide-polyaniline composite material, heating and blending for reaction; and centrifuging the mixture obtained in the fifth step and washing to get graphene-polyaniline composite material. The invention takes the advantage of the big specific surface area of graphene oxide and the capability of the graphene oxide for absorbing aniline on the surface thereof in on organic system to form sandwiched polyaniline / graphene oxide- polyaniline compound through polymerization.

Description

technical field [0001] The invention belongs to organic and inorganic conductive composite materials, in particular to a preparation method of graphene-organic acid doped polyaniline composite material. Background technique [0002] Conductive polymers such as polyaniline are a class of conductive polymer materials that have attracted much attention due to their excellent electrical and electrochemical properties, especially their stable chemical properties and environmental friendliness. Polyaniline is considered to be the most practical application One of the promising conductive polymers, it has broad application prospects in supercapacitors, chemical power sources, antistatic, electrochromic, electromagnetic shielding, and biological and chemical sensors. However, the practical application of conductive polyaniline will encounter a very real aging problem, that is, its long-term doping / dedoping process will cause the volume of the material itself to expand / shrink, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K3/04C08G73/02
Inventor 郝青丽汪信王华兰夏锡锋姚超杨绪杰陆路德
Owner NANJING UNIV OF SCI & TECH
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