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A kind of graphene foam film and its preparation and application

A graphene foam, graphene film technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of low cost and safe preparation of graphene foam technology to be improved, and achieve convenient and fast preparation process and preparation. Simple method and good mechanical properties

Active Publication Date: 2018-08-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can obtain graphene foams with better structures, the technology for rapid, low-cost and safe preparation of graphene foams needs to be improved

Method used

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  • A kind of graphene foam film and its preparation and application
  • A kind of graphene foam film and its preparation and application
  • A kind of graphene foam film and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) At room temperature, weigh 250 mg of graphite oxide prepared by the improved Hummers method, place it in a 100 mL beaker, then make a dispersion with a concentration of 5 mg / mL with 50 mL of deionized water, and then put the beaker into the ultrasonic pool After 4 hours of medium treatment, the graphite oxide was stripped into graphene oxide to obtain 50 mL of a uniform graphene oxide dispersion; the dispersion was poured into a polytetrafluoroethylene petri dish with a diameter of 10 cm, and the petri dish containing the graphene oxide dispersion was Placed on a hot stage at 60°C, evaporated on the hot stage for 12 hours to obtain a graphene oxide film;

[0034] (2) Place the prepared graphene oxide film in 55wt% hydriodic acid solution for reduction for 1h, then wash with alcohol for 3 times to remove residual hydriodic acid on the surface, obtain graphene film after natural drying, and its cross-section scanning electron microscope photos such as figure 2 As sh...

Embodiment 2

[0037] (1) At room temperature, weigh 250 mg of graphite oxide prepared by the improved Hummers method, place it in a 100 mL beaker, then make a dispersion with a concentration of 5 mg / mL with 50 mL of deionized water, and then put the beaker into the ultrasonic pool After 4 hours of medium treatment, the graphite oxide was stripped into graphene oxide to obtain 50 mL of a uniform graphene oxide dispersion; the dispersion was poured into a polytetrafluoroethylene petri dish with a diameter of 10 cm, and the petri dish containing the graphene oxide dispersion was Place it on a hot stage at 60°C, and obtain a graphene oxide film by evaporating on the hot stage for 12 hours;

[0038] (2) Place the prepared graphene oxide film in 55wt% hydroiodic acid solution for reduction for 1h, then wash with alcohol for 3 times to remove residual hydroiodic acid on the surface, and obtain the graphene film after natural drying;

[0039] (3) Connect the closed circuit with wires at both ends o...

Embodiment 3

[0041](1) At room temperature, weigh 250 mg of graphite oxide prepared by the improved Hummers method, place it in a 100 mL beaker, then make a dispersion with a concentration of 5 mg / mL with 50 mL of deionized water, and then put the beaker into the ultrasonic pool After 4 hours of medium treatment, the graphite oxide was stripped into graphene oxide to obtain 50 mL of a uniform graphene oxide dispersion; the dispersion was poured into a polytetrafluoroethylene petri dish with a diameter of 10 cm, and the petri dish containing the graphene oxide dispersion was Place it on a hot stage at 60°C, and obtain a graphene oxide film by evaporating on the hot stage for 12 hours;

[0042] (2) Place the prepared graphene oxide film in 55wt% hydroiodic acid solution for reduction for 1h, then wash with alcohol for 3 times to remove residual hydroiodic acid on the surface, and obtain the graphene film after natural drying;

[0043] (3) Connect the closed circuit with wires at both ends of...

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Abstract

The invention relates to a graphene foam film, and preparation and application thereof. The graphene foam film has a continuous rhombic three-dimensional porous structure. The graphene foam film is prepared by applying direct current to both ends of an obtained graphene film. The application refers to application of the graphene foam film in the aspects of energy storage, flexible electronic sensors, smart clothing, electromagnetic shielding prevention cover layers, heat insulation and noise prevention. According to the invention, the preparation method is simple; the graphene foam film can be quickly prepared at low direct current voltage; large-scale low-cost production can be easily implemented; the cross section of the obtained graphene foam film forms a continuous three-dimensional porous structure; and the graphene foam film has favorable mechanical property, low density, excellent electric conductivity and other properties, and has important practical values in the fields of flexible energy storage, sensing and the like.

Description

technical field [0001] The invention belongs to the field of graphene foam and its preparation and application, in particular to a graphene foam film and its preparation and application. Background technique [0002] Due to its excellent electrical conductivity, thermal conductivity, transparency and mechanical properties, graphene materials have received high attention in recent years in high-tech fields such as microelectronic devices, flexible sensor devices, flexible energy storage devices, smart clothing materials, and aerospace. Researchers have carried out extensive research on the preparation methods and application technologies of graphene. In order to realize the practical application of graphene, it is usually necessary to use chemical and physical means to obtain macroscopic graphene fibers, graphene films, graphene hydrogels, three-dimensional airgel networks, etc., for example: Professor Gao Chao of Zhejiang University passed liquid crystal spinning High-stren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/22C01P2004/03
Inventor 王宏志时秋伟李耀刚张青红侯成义
Owner DONGHUA UNIV
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