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Composite electrode and method for preparing high purity polyaniline nanometer line

A composite electrode, polyaniline technology, applied in capacitor electrodes, electrode shapes/types, circuits, etc., can solve the problems of low yield, low product purity, and low purity of polyaniline nanowires, and achieve simple process and high purity. Effect

Inactive Publication Date: 2008-08-27
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of the template polymerization method is that the yield of the product is high when the template used is suitable, but the disadvantage is that the product purity is low and the steps to obtain pure nanowires are complicated.
When non-template methods (interfacial polymerization and rapid mixing) were used, the obtained polyaniline nanowires were of high purity, with controllable diameter and length of the nanowires, but with low yields
The electrochemical polymerization method has high yield and is environmentally friendly, but it is easy to form a layer of polyaniline particles on the surface of the electrode during the polymerization process, so that the purity of the obtained polyaniline nanowires is not high

Method used

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  • Composite electrode and method for preparing high purity polyaniline nanometer line
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  • Composite electrode and method for preparing high purity polyaniline nanometer line

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Experimental program
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Effect test

Embodiment 1

[0013] 0.629 g of polysulfone was dissolved in 6 mL of N,N-dimethylacetamide to obtain a N,N-dimethylacetamide solution containing 10% polysulfone. Then coat a film on the surface of the stainless steel electrode to control the thickness of the liquid film to 5 μm. Afterwards, the stainless steel electrode coated with polysulfone N, N-dimethylacetamide solution was quickly immersed in a coagulation bath (water) to complete phase inversion, and a polysulfone / stainless steel composite electrode was obtained. The polysulfone / stainless steel composite electrode was used as the working electrode, and another piece of stainless steel was used as the counter electrode. -1 Aniline and 1.00mol·L -1 Sulfuric acid was used as the electrolyte, and a cell voltage of 1.80V was used for electrolytic polymerization for 40 minutes to obtain polyaniline nanowires, the purity of which was 100%.

Embodiment 2

[0015] 1.415 g of polysulfone was dissolved in 6 mL of N,N-dimethylacetamide to obtain a N,N-dimethylacetamide solution containing 20% ​​polysulfone. Then coat a film on the surface of the stainless steel electrode to control the thickness of the liquid film to 100 μm. Afterwards, the stainless steel electrode coated with polysulfone N, N-dimethylacetamide solution was quickly immersed in a coagulation bath (water) to complete phase inversion, and a polysulfone / stainless steel composite electrode was obtained. The polysulfone / stainless steel composite electrode was used as the working electrode, and another piece of stainless steel was used as the counter electrode. -1 Aniline and 1.00mol·L -1 Sulfuric acid was used as the electrolyte, and a cell voltage of 1.80V was used for electrolytic polymerization for 40 minutes to obtain polyaniline nanowires, the purity of which was 100%.

Embodiment 3

[0017] 2.425 g of polysulfone was dissolved in 6 mL of N,N-dimethylacetamide to obtain a N,N-dimethylacetamide solution containing 30% polysulfone. Then coat a film on the surface of the stainless steel electrode to control the thickness of the liquid film to 150 μm. Afterwards, the stainless steel electrode coated with polysulfone N, N-dimethylacetamide solution was quickly immersed in a coagulation bath (water) to complete phase inversion, and a polysulfone / stainless steel composite electrode was obtained. The polysulfone / stainless steel composite electrode was used as the working electrode, and another piece of stainless steel was used as the counter electrode. -1 Aniline and 1.00mol·L -1 Sulfuric acid was used as the electrolyte, and a cell voltage of 1.80V was used for electrolytic polymerization for 40 minutes to obtain polyaniline nanowires, the purity of which was 100%.

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Abstract

The invention discloses a composite electrode which prepares polyaniline nano-wires with high purity and a method for preparing the composite electrode, which belongs to the technique for preparing polyaniline nano-wire materials. A substrate of the composite electrode is stainless steel, titanium, nickel, cobalt, aluminum, iron, copper, graphite or glassy carbon, and thin film of polysulfone, polyether sulfone, polyimide or polyether imide is compounded on the substrate. The method for preparing the composite electrode comprises following steps: dissolving the polysulfone, the polyether sulfone, the polyimide or the polyether imide in N, N-dimethylacetamide, N, N-dimethylformamide, N-methyl pyrrolidone, dimethyl sulfoxide or m-cresol, preparing even and transparent casting solution, coating the casting solution on the surface of a substrate electrode, then, rapidly dipping the electrode in coagulation bath to finish phase inversion, and obtaining the composite electrode. The method of the invention has the advantages that the composite electrode is used as a working electrode to prepare the polyaniline nano-wires, which solves the problem that polyaniline particles exist in the polyaniline nano-wires and increases the purity of the polyaniline nano-wires.

Description

technical field [0001] The invention relates to a composite electrode for preparing high-purity polyaniline nanowires and a preparation method, belonging to the technology for preparing polyaniline nanowire materials. Background technique [0002] Polyaniline has the advantages of readily available raw materials, simple synthesis methods, unique protonic acid doping behavior, excellent electrochemical and optical properties, structural diversity, and good environmental stability. These excellent characteristics make the application of polyaniline in the fields of sensors, actuators, electromagnetic shielding, antistatic coatings, metal anticorrosion, gas separation membranes, super large capacity capacitors and optoelectronic devices have attracted extensive attention. One of the conductive polymers used in practice. In recent years, polyaniline nanowires have attracted great attention of researchers due to their large specific surface area and excellent physical and chemic...

Claims

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Application Information

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IPC IPC(8): C25B11/02H01G9/04H01G13/00
Inventor 王纪孝张海滨李寒露褚青献王志王世昌
Owner TIANJIN UNIV
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