Method for preparing polyaniline

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...

AI Technical Summary

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

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