Method for preparing polyaniline

A technology of polyaniline and aniline, which is applied in the field of large-scale preparation of polyaniline, can solve the problems of environmental pollution, unfavorable scale production, high production cost, etc., and achieve the effect of increasing the output per unit volume, increasing the content, and being easy to realize

Inactive Publication Date: 2017-05-10
NANTONG PILOT TESTS INST OF GREEN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, "A Preparation Method of Polyaniline Nanosheet Structure" (CN 101302292 B), "Emulsion Polymer and Preparation Method of Polyaniline Nanofibers" (CN 102050947B), "Preparation Method of Easily Soluble High-Concentration Polyaniline Solution "(CN 1084757 C), "A Porous Three-Dimensional Doped Polyaniline Nanofiber Material and Its Preparation Method and Application" (CN 104264267 A), mainly emulsification polymerization or template polymerization method, this method generally has the following problems: (1) The templating agent used after the aniline polymerization is not easy to remove, (2) The oil phase organic solvent in the reaction medium is easy to cause environmental pollution, (3) The production of Chen Bengao
However, the use of Schiff base seeds or fat-soluble retinol templates increases the complexity of operation and the low concentration of interfacial polymerization, which is not conducive to large-scale production

Method used

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  • Method for preparing polyaniline
  • Method for preparing polyaniline
  • Method for preparing polyaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve aniline in ethanol to form 1 mol / L solution A; dissolve ammonium persulfate in 1 mol / L hydrochloric acid to form solution B; quickly pour solution B into 1 L according to aniline / ammonium persulfate=1 / 2 In solution A, stir mechanically at 400 r / min at 5°C for 30 minutes, then filter with suction, wash the filter residue with ethanol until it is colorless, wash it with deionized water until it is neutral or close to neutral, and dry it in vacuum at 80°C for 24 h , and then take it out and put it in a desiccator to obtain 92 g of fibrous polyaniline.

Embodiment 2

[0030] Dissolve aniline in acetone to form 2 mol / L solution A; dissolve ammonium persulfate in 1 mol / L sulfuric acid to form solution B; quickly pour solution B into 1 L according to aniline / ammonium persulfate=1 / 4 In solution A, stir mechanically at 400 r / min at 5°C for 30 minutes, then filter with suction, wash the filter residue with ethanol until it is colorless, wash it with deionized water until it is neutral or close to neutral, and dry it in vacuum at 80°C for 24 h , then take it out and put it in a desiccator to get 185 g of granular polyaniline.

Embodiment 3

[0032] Dissolve aniline in ethylene glycol to form 0.5 mol / L solution A; dissolve hydrogen peroxide in 0.5 mol / L hydrochloric acid to form solution B; quickly pour solution B into 1 L of solution A according to aniline / hydrogen peroxide = 1 / 1 After ultrasonication for 60 min at 5°C, filter with suction, wash the filter residue with acetone until it is colorless, wash it with deionized water until it is neutral or nearly neutral, dry it in vacuum at 95°C for 8 h, take it out, put it in In a desiccator, 41.3 g of rod-shaped polyaniline was obtained.

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Abstract

The invention discloses a method for preparing polyaniline in a large-scale manner. The method includes: dissolving aniline into an organic solvent to form a solution A; dissolving an oxidizing agent into water with certain concentration C to form a solution B; fast mixing the solution A and the solution B according a certain proportion; dispersing and polymerizing for certain time under a certain temperature, filtering, cleaning filter residues, and drying. The method has the advantages that the ion interface polymerization method is used, the features that the aniline is high in concentration in the organic solvent and the oxidizing agent is high in concentration in the water system are both considered; the organic solvent used by the method can be mixed with the water to form a homogeneous phase as compared with traditional interface polymerization, the oxidation polymerization of the aniline can be achieved on the ion level, fast reaction speed and high yield are achieved, the polyaniline yield of the method using the same reactor can be increased by several times or dozens of times as compared with that of a conventional polyaniline preparation method, the synthesizing cost of the polyaniline can be lowered effectively, and the wide application of the polyaniline to fields such as super capacitors, electromagnetic shielding, corrosion prevention and transparent electrodes can be promoted.

Description

technical field [0001] The invention relates to the fields of polymer materials, novel materials, energy storage materials, electromagnetic shielding, anti-corrosion and the like, and in particular relates to a large-scale preparation method of polyaniline. Background technique [0002] Polyaniline is a polymer material with alternating benzene rings and nitrogen atoms in its main chain, easy to obtain raw materials, tunable conductivity and potential solution, possibility of melt processing and good environmental stability, in many High-tech fields have been applied, such as conductive polyaniline as the base material for metal anti-corrosion coatings, rechargeable batteries, super capacitors, polymer capacitors, conductive coatings and conductive films, electromagnetic shielding, anti-static protection, electroluminescence and color change Important progress has been made in the fields of materials, solar cells, sensors, electrochemical and catalytic materials, and stealth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
CPCC08G73/0266
Inventor 张志华张清香
Owner NANTONG PILOT TESTS INST OF GREEN TECH CO LTD
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