Preparation method of polyaniline nanometer fiber

Abstract

The invention relates to a preparation method of a polyaniline nanometer fiber. The method comprises the following steps: dissolving a phenylamine monomer and a monomer initiator in acidic solutions containing dopants respectively; respectively loading the resulting solutions in a container A and a container B, wherein the liquid levels in the container A and the container B are consistent; introducing the solutions inside the container A and the container B into a reaction tube, controlling the free flow speeds of the reaction liquids inside the reaction tube, and collecting the reaction products by using a container C containing an inhibitor solution, wherein in the free flow process, the phenylamine is subjected to a polymerization reaction at room temperature or in an ice water environment, and the molar ratio of the phenylamine monomer to the monomer initiator is 1: (0.1-5); and after the flow is finished, causing the reaction products inside the container C to stand still, and then carrying out washing, centrifugation, and drying to obtain the polyaniline nanometer fiber. The preparation method provided by the invention is simple and easy to operate and low in cost; no template needs to be used; the whole process is mainly carried out in a water phase and tedious posttreatment is not needed; the preparation method is high in production efficiency, capable of realizing batch preparation and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of preparation of nanofiber materials, in particular to a preparation method of polyaniline nanofibers. Background technique [0002] Because one-dimensional nanostructured polyaniline has different properties from ordinary polyaniline random particles, it has significant nano-size and space effects, especially its highly ordered aggregated structure greatly improves its carrier mobility. It plays an important role in the fabrication of interconnections and functional units of electronic, optoelectronic, electrochemical and electrical devices at the nanoscale, and has shown great applications in the fields of supercapacitors, biological and chemical sensors, electromagnetic shielding, and adsorption materials potential. In addition to electrospinning [CN100360725C, CN101967279A, CN101973713A], mechanical stretching and other physical methods for synthesizing nanostructured polyaniline, the synthesis of polyaniline ca...

AI Technical Summary

Problems solved by technology

Although the template-free method has achieved certain success in the preparation of polyaniline nanofibers, it also has some disadvantages. For example, a large amount of emulsifier is often used in the reaction process of the emulsion polymerization method, and the post-treatment process is cumbersome; and the most common interfacial polymerization method requires A large amount of organic solvent is used, and the synthesis yield is low. In addition to the irregularity of the prepared polyaniline nanofibers, the ultrasonic polymerization method also requires the use of more expensive equipment and is not suitable for large-scale production.

Although the electrochemical polymerization method [CN1958854A, CN101942090B] effectively controls the size and shape of nanofibers by selecting appropriate electrochemical parameters, this method is only suitable for small batches of one-dimensional conductive polymers due to limited electrode area.

Images