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Process for preparing large length-diameter ratio polyaniline nano-line

A polyaniline and nanowire technology, which is applied in the field of synthesis of conductive polymer nanostructures, can solve the problems of the properties of polyaniline nanowires, potential application influence, strong oxidization, etc., and achieves large aspect ratio, mild reaction conditions, and process. Simple process effect

Inactive Publication Date: 2010-09-22
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxidant (ammonium persulfate) used in this method has strong oxidative properties (high redox potential), and the prepared polyaniline nanowires will agglomerate into thicker nanowires or even particles with the increase of reaction time. Properties and potential applications of aniline nanowires impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At room temperature, 1.4585ml of aniline was dissolved in 50ml of dichloromethane and added to the reactor, and then 0.4086ml of hydrogen peroxide (30% by mass) was dissolved in 50ml of 1M hydrochloric acid solution and added to the reactor to form a two-phase reaction system. hours, the solid in the aqueous phase was collected by filtration, washed with deionized water until neutral, and dried in a vacuum oven at 60°C for 20 hours before collection. The morphology of the sample is observed under a transmission electron microscope (TEM), and the diameter distribution is 20-30 nm, the length is 2-3 μm, and the aspect ratio reaches 100-150.

Embodiment 2

[0020] Measure 0.8172ml hydrogen peroxide (mass fraction 30%) and be dissolved in 50ml 0.5M hydrochloric acid solution, add reactor, reactor is placed in the container that ice-water mixture is housed; Measure again 0.7293ml aniline and be dissolved in 50ml n-hexane, After being cooled by the ice-water mixture, it was added to the reactor to form a two-phase reaction system and reacted for 30 hours. The solid in the aqueous phase was collected by filtration, washed with deionized water until neutral, and dried in a vacuum oven at 60° C. for 20 hours before collection. The morphology of the sample was observed under a transmission electron microscope (TEM), and the diameter distribution was 15-25 nm, the length was 2-3 μm, and the aspect ratio was 130-200.

Embodiment 3

[0022] At room temperature, measure 0.7293ml of aniline dissolved in 50ml of carbon tetrachloride and add to the reactor, then weigh 0.6489g of ferric chloride and dissolve in 50ml of 1M hydrochloric acid solution, add to the reactor to form a two-phase reaction system. After reacting for 25 hours, the solid in the aqueous phase was collected by filtration, washed with deionized water until neutral, dried in a vacuum oven at 65° C. for 18 hours, and collected. The morphology of the sample was observed under a transmission electron microscope (TEM), and the diameter distribution was 20-30 nm, the length was about 3 μm, and the aspect ratio was 100-150.

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Abstract

A preparation method for polyaniline nano-wires with big aspect ratio is as folloes: aniline monomers dissolve in an organic solvent to be made into an aniline organic phase with 0.08 to 0.32mol / L concentration; weak oxidants dissolve in hydrochloric acid to be made into a water phase with 0.08 to 0.32mol / L concentration; by the molar ratio of aniline: weak oxidants =1:0.25 to1, the high intensity organic phase or the water phase is firstly added in a reactor under the temperature of 0 DEG C to the room temperature, and then is added with the low intensity water phase or the organic phase to react for 15 to 35 hours to obtain a solid product; the solid product is washed to neutrality, and is dried in vacuum for 15 to 20 hours under the temperature of 60 to 70 DEG C. The preparation methodhas the advantages of simple process and equipment, low energy consumption and big aspect ration of the obtained polyaniline nano-wires.

Description

technical field [0001] The invention belongs to a method for synthesizing a conductive polymer nanostructure, in particular to a method for preparing polyaniline nanowires with a large aspect ratio by oxidative polymerization using a weak oxidant in an interface method. Background technique [0002] As a special member of the conductive polymer family, polyaniline has attracted much attention due to its easy synthesis, high stability and unique doping / dedoping mechanism. It has been used in sensors, batteries, metal anti-corrosion, electromagnetic shielding, etc. It has been widely used in many fields such as catalysis and catalysis. In addition to the excellent physical and chemical properties of organic conductive polymers, polyaniline nanowires also have unique size and dimension effects of one-dimensional nanostructures in terms of electron transport behavior, optical properties, and mechanical and mechanical properties. , electrochemistry and related nano-devices and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 朱珍平郑剑锋赵江红
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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