Preparation method of polyaniline and derivative nanofiber

Abstract

The invention discloses a preparation method of polyaniline and its derivative nanofiber. By a high speed centrifugal polymerization method, polyaniline and its derivative nanofiber are prepared by one step. The preparation method comprises the following steps: adding aniline and its derivative monomer into an acid solution doped with hydrochloric acid, sulfuric acid, nitric acid, citric acid and the like at a certain temperature to form a protonated salt solution, rapidly adding quantitative oxidants such as ammonium persulfate, hydrogen peroxide, ferric trichloride, potassium persulphate and the like into the protonated salt solution and mixing, placing the mixture into a centrifuge tube having a certain rotate speed and reacting for 0.1-1.0 h, removing a clear liquid, and drying polyaniline and its derivative at 60 DEG C in vacuum for 12 h so as to prepare the high-quality polyaniline and its derivative nanofiber. According to the method, reaction and separation are carried out simultaneously. The preparation method is simple and easy to operate, has advantages of high yield, low time consumption and low cost, and is easy to realize industrial production.

Description

technical field [0001] The invention relates to a technology for preparing conductive polymer materials, in particular to a method for preparing polyaniline and its derivative nanofibers. Background technique [0002] Nanomaterials refer to materials with at least one dimension in the nanoscale range (1-100nm) in three-dimensional space. Compared with other materials, nanomaterials are widely used in photothermal absorption, special conductors, molecular sieves, Catalysts, ultra-micro composite materials, sensitive components and other fields. It has become the most promising material in the 21st century. [0003] As a very important conductive polymer, polyaniline not only has unique characteristics such as easy doping, redox, electrical conductivity, easy synthesis and low cost, but also can form coordination with metals to compound Special new material. In addition, polyaniline has great application potential in electromagnetic shielding materials, antistatic coatings...

AI Technical Summary

Problems solved by technology

Although the operation steps of the hard template are simplified, the controllability of the shape of polyaniline is poor

In addition, although the performance of nanofiber polyaniline is prepared by electrochemical method, the preparation cost is high and the conditions are harsh.

Kaner's interfacial polymerization method to prepare nanofiber polyaniline requires a large amount of organic solvents, which is easy to cause environmental pollution

It can be seen that although there are many kinds of synthetic methods for polyaniline, the synthetic methods themselves have certain defects. The microscopic morphology of polyaniline and its derivatives is not easy to control, and the processability is poor.

Even if the morphology is improved by changing the process conditions, the method for developing and preparing nanofiber polyaniline and its derivatives with uniform morphology is not perfect, the preparation method is relatively complicated, and the processing cost is relatively high

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