A kind of preparation method of graphene composite airgel
A graphene composite and composite airgel technology, which is applied in the fields of airgel preparation, chemical instruments and methods, colloid chemistry, etc., can solve problems such as inhibiting application potential, and achieve accurate and detailed data, high specific surface area, and advanced technology Effect
Inactive Publication Date: 2020-09-08
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0002] Graphene has excellent electrical and thermal conductivity, high strength, and high specific surface area, and has been widely used in the fields of catalysis, sensing, optoelectronics, adsorption, and energy storage; however, the strong π between graphene sheets The existence of forces such as -π effect, van der Waals force and hydrogen bond lead to its irreversible accumulation tendency, thus inhibiting its application potential; in order to solve this drawback, single-layer graphene is assembled into a three-dimensional structure of airgel It can effectively curb the accumulation tendency between graphene sheets, and increase its actual specific surface area and porosity, so as to fully tap the inherent potential of graphene
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[0055] The present invention will be further described below in conjunction with accompanying drawing:
[0056] figure 1 As shown in the figure, it is the state diagram for the preparation of the composite airgel. The position and connection relationship of each part must be correct and the installation should be firm.
[0057] The heating furnace 1 is vertical, and the inside of the heating furnace 1 is a furnace chamber 7. A workbench 2 is provided at the bottom of the furnace chamber 7, and a reaction kettle 13 is placed on the workbench. The reaction kettle 13 has a built-in polytetrafluoroethylene container 12, polytetrafluoroethylene container 12 Be reaction solution 15 in the tetrafluoroethylene container 12, and cover by polytetrafluoroethylene container lid 11; Be reactor lid 10 at reactor top; Top is furnace lid 8; Furnace base 3 is provided with display screen 9, Indicator light 14, power switch 6, heating temperature controller 5, heating time controller 4.
[00...
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Abstract
The invention relates to a preparation method of graphene composite aerogel. Compared with the background technology, the preparation method has obvious advancement and uses graphene and carbon spheres as raw materials and uses ascorbic acid to assist reduction and synthesize the graphene composite aerogel according to the characteristics of electric conduction, heat conduction, high mechanical strength and high specific surface area of graphene. The preparation method is advanced in process and accurate and detailed in data; the prepared composite aerogel is a black cylindrical blocky material, the porosity is 99.56%, the mass density is 9.6mg / cm<3>, the internal carbon microsphere size is less than or equal to 400nm, the internal carbon microspheres and a graphene sheet layer support each other to form three-dimensional porous structures which are crosslinked with each other; the pore size of the composite aerogel is less than or equal to 50mum and the preparation method is an advanced method for preparing the graphene composite aerogel.
Description
technical field [0001] The invention relates to a preparation method of graphene composite airgel, which belongs to the technical field of carbon material preparation, surface functional modification and application. Background technique [0002] Graphene has excellent electrical and thermal conductivity, high strength, and high specific surface area, and has been widely used in the fields of catalysis, sensing, optoelectronics, adsorption, and energy storage; however, the strong π between graphene sheets The existence of forces such as -π effect, van der Waals force and hydrogen bond lead to its irreversible accumulation tendency, thus inhibiting its application potential; in order to solve this drawback, single-layer graphene is assembled into a three-dimensional structure of airgel It can effectively curb the accumulation tendency between graphene sheets, and increase its actual specific surface area and porosity, so as to fully exploit the inherent potential of graphene....
Claims
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IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 刘旭光张二辉刘伟峰杨永珍陈琳
Owner TAIYUAN UNIV OF TECH