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Method for quickly preparing silver/polypyrrole composite sol by adopting microwave method

A composite sol and polypyrrole technology, which is applied in the field of preparation of silver/polypyrrole composite sol materials, can solve problems such as slow kinetics

Inactive Publication Date: 2011-08-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when preparing silver / polypyrrole composites, it was found that although the reaction between silver ions and pyrrole monomers was thermodynamically feasible, the kinetics of the reaction was very slow [Matthew C.Henry, Chen-Chan Hsueh , Brian P.Timko, Michael S.Freund, Reaction of pyrroleand chlorauric acid,: a new route to composite colloids, J.Electrochem.Soc.148(11)(2001)D155-D161.], for example, in the absence of light Under conditions, it takes 48 hours to form a silver / polypyrrole film in 0.5M silver nitrate+0.5M pyrrole aqueous solution [M.A.Breimer, G.Yevgeny, S.Sy, O.A.Sadik, Incorporation of metal nanoparticles in photopolymerized organic conducting polymers: A mechanistic insight, Nano Lett. 1 (2001) 305-308.]
Although ultraviolet light irradiation can shorten the time required for this process to a certain extent, it still takes several hours, and there are few reports on other methods that can effectively improve the kinetics of this reaction.

Method used

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  • Method for quickly preparing silver/polypyrrole composite sol by adopting microwave method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] As in the above steps, weigh 300 mg of silver nitrate and 0.55 ml of pyrrole monomer, dissolve them in 40 ml of DMF respectively, and then mix the two solutions to form a mixed solution of silver nitrate + pyrrole. After stirring evenly, the mixed solution was placed in a microwave device. Under the condition of power of 500W and temperature of 70°C, Ag / PPy composite sol was obtained after microwave irradiation for 20 minutes. The UV-Vis absorption spectrum pattern is shown in figure 1 a.

Embodiment 2

[0012] As in the above steps, weigh 300 mg of silver nitrate and 0.55 ml of pyrrole monomer, dissolve them in 40 ml of DMF respectively, and then mix the two solutions to form a mixed solution of silver nitrate + pyrrole. After stirring evenly, the mixed solution was placed in a microwave device. Under the conditions of power of 600W and temperature of 70°C, Ag / PPy composite sol was obtained after microwave irradiation for 30 minutes. The UV-Vis absorption spectrum pattern is shown in figure 1 b.

Embodiment 3

[0014] As in the above steps, weigh 1.36g of silver nitrate and 5.7ml of pyrrole monomer, dissolve them in 40ml of DMF respectively, and then mix the two solutions to form a mixed solution of silver nitrate + pyrrole. After stirring evenly, the mixed solution was placed in a microwave device, and the Ag / PPy composite sol was obtained after microwave irradiation for 5 minutes at a power of 900W and a temperature of 80°C;

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Abstract

The invention discloses a method for quickly preparing silver / polypyrrole composite sol. An oxidation-reduction reaction between a silver salt and a pyrrole monomer is a simple and effective method for preparing a silver / polypyrrole composite material, but has the defect of low dynamic reaction speed. In the invention, a method for adding a microwave external field irradiation solution into a reaction system is provided, so that the reaction speed is effectively increased, and the silver / polypyrrole composite sol is formed within 15-270 minutes.

Description

technical field [0001] The invention relates to a preparation method of a silver / polypyrrole composite sol material, in particular to a method for improving the kinetic reaction speed between silver salt and pyrrole monomer by utilizing microwave technology. Background technique [0002] Noble metal / conducting polymer materials are an important branch of metal / polymer composite materials, which have important applications in biology, storage, electronics, and catalysis. Utilizing the redox reaction between noble metals and monomers is a simple and effective method to prepare noble metal / conductive polymer composites. At present, using this method has prepared gold / polypyrrole, gold / polyaniline, silver / Composite materials such as polypyrrole and silver / polyaniline. However, when preparing silver / polypyrrole composites, it was found that although the reaction between silver ions and pyrrole monomers was thermodynamically feasible, the kinetics of the reaction was very slow [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/08C08G73/06C08J3/28
Inventor 赵崇军谷淑娜徐云龙钱秀珍
Owner EAST CHINA UNIV OF SCI & TECH
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