A kind of preparation device and method of polyaniline nanofiber

Abstract

The invention provides a preparation device and method for polyaniline nanofibers. The preparation method comprises adding the aniline monomer and the monomer initiator into the first container and the second container containing the acidic solution respectively, and after it dissolves, first introduce the solutions in the first container and the second container into The thin tube part of the reaction tube then flows into the thick tube part of the reaction tube, and is finally collected into a collection container; the reaction product in the collection container is washed, filtered and dried to obtain polyaniline nanofibers. The preparation method of the invention is simple and easy to operate, and the cost is low. The polymerization process is mainly carried out in the water phase, avoiding the use of any template and tedious post-processing procedures; the reaction is easy to control, the production efficiency is high, and it is suitable for large-scale continuous production.

Description

technical field [0001] The invention belongs to the field of preparation of nanofiber materials, in particular to a preparation device and method of polyaniline nanofibers. Background technique [0002] Among many conductive polymer materials, polyaniline has the characteristics of diverse structures, high electrical conductivity, unique doping mechanism, excellent physical properties, good environmental stability and cheap raw materials, while one-dimensional Nanostructured polyaniline has significant steric effect and nanometer size, especially its highly ordered aggregated structure greatly improves the mobility of its carriers. , chemical and biological sensors, electromagnetic shielding and stealth materials and other fields show great application potential. In addition to physical methods such as mechanical stretching and electrospinning [CN101973713A, CN101967279A, CN100360725C], nanostructured polyaniline can also be synthesized by electrochemical oxidation and chem...

AI Technical Summary

Problems solved by technology

There are also some problems in the template-free method. For example, the interfacial polymerization method needs to use a large amount of organic solvent, and the synthesis yield is low; while a large amount of emulsifier is often used in the emulsion polymerization process, and the post-treatment process is cumbersome; The structure of polyaniline nanofibers is not regular, and the equipment used is relatively expensive and cannot be prepared continuously

Recently we proposed to adopt the method of free flow to continuously prepare polyaniline nanofibers [CN103408754A], but because of the large flow rate adopted in this method, in most cases, aniline monomers are not completely converted into polyaniline with larger molecular weight , more aniline oligomers, although the continued reaction in the collection container can be slowed down by adding inhibitors in the collection container, it will still cause the size and structure of the products obtained in different time periods to be inconsistent; in addition, the prepared polyaniline Nanofibers tend to tangle together

Images