Preparation method of graphical three-dimensional graphene/polyurethane flexible conductive film

Abstract

The invention relates to a preparation method of a graphical three-dimensional graphene / polyurethane flexible conductive film. The preparation method comprises the steps of growing a three-dimensional structured graphene material; performing original-position patterning; applying a flexible substrate material on the three-dimensional structured graphene material; solidifying the flexible substrate material for forming a film; and directly peeling from a growth substrate for obtaining the three-dimensional graphene / polyurethane flexible conductive film, wherein the three-dimensional graphene has a three-dimensional continuous structure with a nanometer-size. The film substrate is made of a polyurethane elastomer high-polymer material with certain flexibility. Patterning technology comprises the steps of nanoimprinting, ion beam direct writing, etc. The graphical three-dimensional graphene / polyurethane flexible conductive film has high performance at aspects of electric conductivity, flexibility, etc. The graphical three-dimensional graphene / polyurethane flexible conductive film has wide application prospect in the fields of nanometer photoelectric device, super-capacitor, flexible intelligent sensor, wearable equipment, electronic skin and flexible solar cell.

Description

technical field [0001] The invention relates to a method for preparing a patternable three-dimensional graphene / polyurethane flexible conductive film, which belongs to the technical field of electronic materials. Background technique [0002] Graphene is an emerging carbon material in the 21st century. Its excellent physical and chemical properties, electron transport performance, good thermal conductivity and light transmittance make graphene materials widely used in nano-optoelectronic devices, supercapacitors, flexible smart sensors, energy storage and composite materials. Materials and other fields have broad application prospects. However, with the continuous development of science and technology, the traditional planar two-dimensional graphene film gradually cannot meet the stringent requirements of some scientific research work. The two-dimensional planar graphene film is easily broken or damaged under the action of external force, resulting in the structure and The ...

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Problems solved by technology

However, with the continuous development of science and technology, the traditional planar two-dimensional graphene film gradually cannot meet the stringent requirements of some scientific research work. The two-dimensional planar graphene film is easily broken or damaged under the action of external force, resulting in the structure and The problem of unstable excellent characteristics, and the two-dimensional planar graphene film is lower than the three-dimensional graphene film in terms of flexibility and electrical properties, so a new type of graphene structure with a nano-three-dimensional shape gradually appears in the public's field of vision. Graphene assembly into 3D structures translates nanoscale effects to macroscopic levels

[0003] The existing commonly used methods for preparing three-dimensional graphene materials include hydrothermal method, sol-gel method, and vapor phase deposition method. The output is low and the production cost is high; at the same time, the base materials used in the existing flexible conductive film manufacturing methods are mostly selected from PDMS, PUA, PI, etc. The disadvantage is that the adhesion between these base materials and graphene is poor, and The stretchability of the material itself is not strong, so that the existing graphene film flexible electrodes cannot withstand large stress, the stretching threshold range is low, and the recovery is poor. Therefore, how to obtain this kind of patternable three-dimensional graphene flexible conductive Thin film has become an urgent problem to be solved in this field

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