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Preparation method of nanostructured polypyrrole

A technology of nanostructure and polypyrrole, which is applied in nanotechnology, electrical components, electrolytic capacitors, etc., can solve the problems of limiting polypyrrole nanostructure, product purity and structural influence, and achieves simple and fast methods, good environmental stability, and reaction Process controllable effect

Active Publication Date: 2013-02-13
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
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Problems solved by technology

Existing preparations of polypyrroles with special nanostructures (such as one-dimensional nanotubes, nanowires, etc.) often require the use of soft templates (such as surfactants) and hard templates (such as AAO templates). Contaminants, but also requires subsequent template removal process, the purity and structure of the final product will also be affected, which limits the application of polypyrrole nanostructures to a certain extent

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  • Preparation method of nanostructured polypyrrole
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  • Preparation method of nanostructured polypyrrole

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[0032] The present invention provides a method for preparing polypyrrole with a nanostructure. In one embodiment, it includes the steps of: using manganese dioxide with a certain nanostructure morphology as a reaction template to react with pyrrole monomers in an acidic solution , the pH of the acidic solution is 0~6, the reaction temperature is -10~50°C, the molar ratio of pyrrole monomer to manganese dioxide is ≥1:2, and polypyrrole is prepared, and the nanostructure of polypyrrole is in the form of The appearance is the same as the nanostructure appearance of the manganese dioxide.

[0033] In some other preferred embodiments, at least one of the following conditions may also be preferred:

[0034] The pH value of the acidic solution is 0-3.

[0035] The reaction temperature is 0-15°C.

[0036] The molar ratio of the pyrrole monomer to manganese dioxide is 1:2 to 1:1, more preferably 1:1.

[0037] The structure and morphology of the manganese dioxide is a one-dimensional...

Embodiment 1

[0045] Weigh 0.658 g of potassium permanganate powder and dissolve it in 75 ml of deionized water to form a purple solution, then add 1.5 ml of concentrated hydrochloric acid, stir evenly by magnetic force, place it in a hydrothermal reaction kettle, and keep it warm at a temperature of 140°C Natural cooling after 10 hours, the α-type manganese dioxide nanotube powder obtained, its scanning electron microscope picture is as follows Figure 1a As shown, after filtering and rinsing, bake in a drying oven at 80°C for 12h.

[0046] Prepare 20ml of dilute hydrochloric acid solution and adjust the solution to pH=1, weigh 0.1 g of the above-mentioned manganese dioxide powder into dilute hydrochloric acid, and make the dioxide Manganese is fully dispersed in the solution, forming a brown suspension.

[0047]Quickly inject 75 μl of pyrrole monomer into the above-mentioned suspension using a micro-injection pump, stir with magnetic force for 15 minutes to mix the reactants evenly, and t...

Embodiment 2

[0049] Potassium permanganate and manganese sulfate were weighed and dissolved in deionized water at a molar ratio of 2:3, and the two solutions were uniformly mixed, and stirred magnetically at 60°C for 6 hours to react to obtain α-type manganese dioxide nanorod powder. After filtering and rinsing, bake in a drying oven at 80°C for 12 hours.

[0050] Prepare 15ml of dilute sulfuric acid solution and adjust the solution to pH = 2, weigh 0.05 g of the above manganese dioxide powder into dilute sulfuric acid, and ultrasonically disperse the manganese dioxide in the solution for 30 minutes to form a brown suspension liquid.

[0051] Quickly inject 50 μl of pyrrole monomer into the above-mentioned suspension using a micro-injection pump, stir the reactants uniformly for 20 minutes by magnetic stirring, and let stand at 5°C for 1.5 hours to obtain a black suspension. After filtering, Wash with deionized water and absolute ethanol several times until pH = 7, and then dry in a vacuu...

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Abstract

The invention discloses a preparation method of nanostructured polypyrrole. The method comprises the steps of using manganese dioxide with a certain nanostructure morphology as a reaction template, carrying out reaction on pyrrole monomer in an acid solution with a pH value of 0-6 at a reaction temperature of -10 to 50 DEG C to obtain polypyrrole, wherein the mole ratio of the pyrrole monomer to manganese dioxide is greater than or equal to 1:2. The polypyrrole has the same nanostructured morphology with manganese dioxide. The method provided by the invention is simple, efficient, green and environment-friendly, has the advantages of high repeatability, controllable reaction process, no need of adding a surfactant with pollution to the environment, and no need of the subsequent process for removing the template; the prepared polypyrrole has the advantages of high purity, high conductivity, and good environmental stability; the multi-dimensions or multilevel structures of the prepared polypyrrole can be controllably obtained through changing the micro morphologies of manganese dioxide; moreover, the prepared polypyrrole can be used in the fields of super capacitors, lithium ion batteries, sensors, field effect transistors, electrochromic displays and the like.

Description

technical field [0001] The invention relates to a preparation method of a conductive polymer, in particular to a preparation method of polypyrrole with a nanometer structure. Background technique [0002] Conductive polymer is a polymer material with conductive properties. Due to the conjugated π system formed on its main chain, it can obtain electrical conductivity through doping and other methods. The electrical conductivity is between semiconductors and conductors. Representative conductive polymers include polyacetylene, polythiophene, polypyrrole, polyaniline, polyphenylene, polyparaphenylene and their derivatives. This type of polymer not only has outstanding electrical conductivity, but also exhibits excellent photoconductive properties, nonlinear optical properties, luminescence and magnetic properties, and also has good machinability. These characteristics make it a potential application background . [0003] Among many conductive polymers, polypyrrole combines th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06H01G9/042B82Y40/00
CPCY02E60/13
Inventor 康飞宇王建淦杨颖黄正宏
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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