Preparation method of three-dimensional reduced graphene oxide/polyaniline composite material

Abstract

The invention discloses a preparation method of a three-dimensional reduced graphene oxide / polyaniline composite material, which comprises the following steps: 1) uniformly stirring a graphene oxide raw material and deionized water in a reactor to obtain a graphene oxide dispersion solution; 2) adding aniline, stirring uniformly, adding medium acid, stirring uniformly under ice bath conditions, and adding an initiator; filtering the reaction product, washing the filter residue, and drying to obtain a graphene oxide / polyaniline composite material; and 3) uniformly mixing the graphene oxide / polyaniline composite material with the graphene oxide dispersion solution, putting in a closed reactor, carrying out hydrothermal reaction to form a three-dimensional reduced graphene oxide polyaniline / composite material aquagel, and drying to obtain the three-dimensional reduced graphene oxide / polyaniline composite material. The polyaniline nano particles are uniformly dispersed among the reduced graphene oxide sheets to form the three-dimensional network-structure composite material. The composite material has the advantages of large specific area, high electric conductivity and high structural stability of polyaniline.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional reduced graphene oxide / polyaniline composite material by combining organic and inorganic materials, and belongs to the technical field of preparation methods and applications of composite materials, energy storage materials and adsorption materials. Background technique [0002] Polyaniline with nanostructure has good electrical conductivity, thermal stability and chemical stability, and the synthesis process is simple, so it has broad application prospects in the fields of energy storage materials and wave-absorbing materials. However, its structure is prone to swelling and shrinking during long-term recycling, which severely limits its further application. As a new type of carbon nanomaterial, graphene or reduced graphene oxide has a unique two-dimensional structure that enables it to have super-strong electrical conductivity and a large theoretical specific surface area. Combining g...

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Problems solved by technology

[0004] The graphene / polyaniline composite material prepared by the above-mentioned disclosed method, due to the relatively weak non-covalent bonding force, makes the structural stability of the prepared reduced graphene oxide / polyaniline composite material unsatisfactory; Although the covalent modification of aniline on graphene can enhance the interaction force between graphene and polyaniline and improve the stability of the structure, due to the addition of other reagents during the modification of graphene oxide, the uniform It is difficult to remove it in the dispersion, which will seriously affect the purity of the composite material; and the current composite materials prepared by covalent bonding or non-covalent bonding are difficult to effectively alleviate the problem of graphene agglomeration, and then It is difficult for the two to fully reflect their respective advantages in composite materials

[0005] So far, there have been no reports on the preparation of three-dimensional reduced graphene oxide / polyaniline composites using a two-step composite method.

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