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Polymer composite material, preparation method thereof and chemically modified electrode

A technology of composite materials and polymers, applied in the field of polymers, can solve the problems that graphene is easy to agglomerate and curl, and it is difficult to obtain high catalytic performance graphene-nano-copper composite materials, so as to achieve high electronic conductivity and good clinical application prospects , improve the catalytic effect

Inactive Publication Date: 2013-07-24
QINGDAO UNIV
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  • Abstract
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Problems solved by technology

[0005] Although the graphene-Cu composite material obtained by the above-mentioned prior art can have electrochemical catalytic properties and realize the detection of electrochemically active substances, the graphene therein is prone to agglomeration and curling, and it is difficult to obtain graphene-Cu composites with high catalytic performance. Nano Copper Composite

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  • Polymer composite material, preparation method thereof and chemically modified electrode
  • Polymer composite material, preparation method thereof and chemically modified electrode
  • Polymer composite material, preparation method thereof and chemically modified electrode

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preparation example Construction

[0040] The invention provides a kind of preparation method of polymer composite material, comprises the following steps:

[0041] a) mixing graphene oxide, polyacrylic acid and metal salt compounds in a solvent to obtain a mixed solution;

[0042] b) reacting the mixed solution obtained in step a) with a reducing agent to obtain a polymer composite material. In the invention, graphene oxide, polyacrylic acid and metal salt compounds are mixed in a solvent to obtain a mixed solution. In the present invention, the graphene oxide dispersion is preferably firstly provided, and then the graphene oxide dispersion is mixed with the polyacrylic acid solution, and the graphene oxide-polyacrylic acid solution is obtained by standing still after ultrasonication. The present invention has no special limitation on the source of the graphene oxide, and the graphene oxide well known to those skilled in the art can be used. Graphene oxide was prepared. In the present invention, the graphen...

Embodiment 1

[0082] Add 2.5g of expanded graphite and 5g of sodium nitrate in a 500mL beaker, then add 120mL of concentrated sulfuric acid with a mass concentration of 98%, and stir the resulting mixture for 120min in an ice bath;

[0083] Then under the condition of strong stirring, slowly add 15g potassium permanganate to the obtained mixture for reaction, the temperature of the reaction is controlled below 20°C;

[0084] After the addition of potassium permanganate was complete, the ice bath was removed, and the resulting reaction product was stirred overnight at room temperature. As the reaction progressed, the inventor observed that the mixture in the beaker gradually turned into a paste, and the color turned into bright brown;

[0085] Finally, under vigorous stirring, 150 mL of secondary water was added dropwise to the beaker, the reaction temperature rose rapidly to 98°C, and foam was observed, and the color of the reaction product in the beaker turned yellow;

[0086] The reactio...

Embodiment 2

[0089] The graphite oxide that 30mg embodiment 1 is obtained is dispersed in 30mL secondary water, obtains graphene oxide dispersion liquid, then adds 20mL mass fraction in described graphene oxide dispersion liquid and is 15% polyacrylic acid solution, the graphene oxide that obtains - The polyacrylic acid mixed solution was ultrasonically dispersed for 4 hours, and left to stand overnight;

[0090] Then, under strong stirring conditions, 50 mL of copper chloride with a molar concentration of 0.2 mol / L was added to the overnight graphene oxide-polyacrylic acid mixed solution, and continued strong stirring for 2 h at room temperature to obtain a mixed solution;

[0091] Finally, NaBH with a molar concentration of 0.4 mol / L was mixed under stirring conditions 4 The solution was added dropwise to the above mixed solution until the color of the solution completely changed from blue to brown, then the addition was stopped to obtain the reaction product;

[0092] The obtained reac...

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Abstract

The invention provides a preparation method of a polymer composite material. Graphene oxide, polyacrylic acid and a copper salt are taken as starting raw materials, and the polymer composite material comprises copper nano-particles, the polyacrylic acid and graphene; and the weight ratio of the copper nano-particles to the polyacrylic acid to the graphene oxide is (0.5-8): (1-10): (0.01-0.1). In the preparation method provided by the invention, the graphene oxide can be better dispersed under the action of bifunctional molecules of the polyacrylic acid, so that the agglomeration problem of a graphene solution can be solved; furthermore, more copper nano-particles can be riveted on the surface of the graphene, so that the catalytic action of the polymer composite material is improved; and in addition, the obtained graphene has higher electro-catalytic action and electron conduction performance, so that the polymer composite material provided by the invention has higher electro-catalytic performance, can be used as a modification layer to prepare a modified electrode, can be used for electro-chemical determination of glucose, and improves the sensitivity in detection of the glucose.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a polymer composite material, a preparation method thereof and a chemically modified electrode. Background technique [0002] Graphene is a new type of nano-carbon material. It has been widely concerned by many researchers since it was discovered by Geim, a professor of physics at the University of Manchester, UK, in 2004. Studies have found that graphene's unique properties, such as fast electron transfer rate, large specific surface area, high thermal conductivity, excellent mechanical properties and good biocompatibility, are widely used in nanoelectronic devices, energy conversion storage, Composite materials, field emission materials and ultra-sensitive biosensors have broad application prospects. [0003] Because of its large specific surface area and large number of surface active centers, nano-copper and its compounds are excellent catalysts in the fields of metallurgy,...

Claims

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Application Information

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IPC IPC(8): B01J31/06G01N27/30
Inventor 王宗花夏建飞张菲菲强晓玲李金花夏延致李延辉
Owner QINGDAO UNIV
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