A kind of preparation method of in-situ polymerization polypyrrole nanofiber

Abstract

The invention relates to a preparation method of in-situ polymerization polypyrrole nano-fibers, which belongs to the technical field of preparation of functional polymer materials. The preparation method comprises the following steps: adhering pyrrole monomers onto the inner and outer surfaces of hollow Fe2O3 nano-fibers to cover the inner and outer surfaces of the nano-fibers with the high-concentration pyrrole monomers, and then, carrying out acid treatment on the hollow Fe2O3 nano-fibers covered with the pyrrole monomers on the inner and outer surfaces, wherein in the acid treatment process, Fe2O3 generates Fe3<+1> with strong oxidizability, so that when the hollow Fe2O3 nano-fibers are dissolved, in-situ polymerization of the pyrrole monomers is performed on the hollow Fe2O3 nano-fibers to prepare the polypyrrole nano-fibers. The polypyrrole nano-fibers prepared by the preparation method disclosed by the invention have the characteristics of stable morphology and good conductivity and can be used as an electrode material of lithium ion batteries. The preparation method disclosed by the invention is simple and can be applied to mass production.

Description

technical field [0001] The invention relates to a preparation method of in-situ polymerized polypyrrole nanofibers, belonging to the technical field of preparation of functional polymer materials. technical background [0002] Conductive polymer nano / microstructure functional materials have important applications in high-tech fields. As the research subject of the "2000 Nobel Prize in Chemistry", conductive polymers are a class of polymers whose conductivity is between semiconductors and metals, and whose performance is even comparable to that of metals. They are known as "synthetic metals". It has unique electronic, electrochemical and optical properties, so it has important applications in energy, information storage, optoelectronic devices, sensors, military shadow technology, etc. The title of the invention is "a hybrid supercapacitor and its manufacturing method", which uses the high capacitance and relatively low resistance of polypyrrole polymer materials to have goo...

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Problems solved by technology

The polypyrrole obtained by chemical oxidative polymerization is usually a powder without any mechanical strength. It is difficult to dissolve in general organic solvents, and it is not easy to process into the desired product. It must be compressed to form a film, and because the polypyrrole powder has a high Specific to the surface, its chemical degradation is relatively serious, so the polypyrrole obtained has poor conductivity stability; although electrochemical polymerization can obtain a self-supporting pyrrole film with good electrochemical properties and mechanical properties, there is a single preparation amount. Less disadvantages; the template method is divided into hard template method and soft template method. Although the hard template method has monodispersity and is widely used, it also has high production cost, complicated preparation process, low efficiency, and difficult template removal. In addition to other shortcomings, although the soft template method can overcome some shortcomings of the hard template method, such as the template is easy to remove, and a large number of target products can be prepared, it still has the disadvantage that the shape of the product is not easy to control.

The name disclosed in the 2012 document J.Mater.Chem No. 22, page 23049-23056 is "1D hollow α-Fe 2 o 3 electrospun nanofibers as high performance anode material for lithium ion batteries" and the name published in the 2009 Materials Research Bulletin No. 6 Volume 44 is "Electrospinning route for α-Fe 2 o 3 It is reported in "ceramic nanofibers and their gas sensing properties" that hollow Fe was prepared by electrospinning 2 o 3 Related technologies of nanofibers, but the preparation scheme provided by the above literature is only to prepare hollow Fe 2 o 3 Nanofibers and some characterization analysis of its structural properties, but did not make full use of this hollow Fe 2 o 3 Nanofibers

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