Water-soluble self-doping aniline oligomer and preparation method thereof

Abstract

The invention belongs to the field of functional materials, in particular to a novel aniline oligomer with water solubility and self-doping character and a preparation method thereof. The aniline oligomer is prepared by the preoxidation coupling reaction of p-phenylenediamine and a monomer which is obtained by the reaction of p-aminodiphenylamine and propane sultone. The invention is characterized in that the synthesis route is simple, the reaction condition is mild, and the operation is convenient. The synthesized aniline oligomer has good dissolubility in water, and simultaneously, the existence of sulfonic groups at the two ends enables the aniline oligomer to have the self-doping character and show certain electrochemical activity in acid, neutral or even alkaline environment. The water-soluble aniline oligomer has great application potency in terms of metal corrosion inhibition.

Description

technical field The invention belongs to the field of functional materials, and specifically relates to a novel aniline oligomer with water solubility and self-doping properties and a preparation method thereof. technical background Polyaniline is a typical conductive polymer. Because of its high conductivity, easy synthesis, easy access to raw materials, and good electrochemical properties, it is widely used in secondary batteries, metal anti-corrosion, light-emitting devices, electromagnetic shielding, and gas separation membranes. , catalysis and sensors have shown a wide range of application prospects. However, the shortcomings of traditional polyaniline materials, such as insolubility, poor processability, etc., greatly limit its practical application. Therefore, more attention has been shifted to the research of water-soluble polyaniline and its derivatives. At present, there are the following methods to solve the water solubility of conductive polyaniline: (1) intr...

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Problems solved by technology

First of all, the synthesis conditions of water-soluble polyaniline are harsh, and the steps of separation and purification are cumbersome, and the problem of how to separate the copolymer from the homopolymer of the product obtained by the copolymerization of aniline and aniline derivatives has not yet been resolved

Secondly, some of the water-soluble polyanilines currently reported can only be dissolved in aqueous solutions with a specific pH value, and many of them exist as water-dispersible micelles. Existence, far from being dissolved at the molecular level

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