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Preparation method and application of graphene/carbon nanotube composite porous membrane

A carbon nanotube composite, carbon nanotube technology, applied in the directions of graphene, nanocarbon, carbon compounds, etc., can solve the problem of high requirements for preparation process, and achieve the effects of reducing reflection loss, simple preparation, and lowering temperature

Inactive Publication Date: 2020-09-01
HUANGHUAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a preparation method and application of a graphene / carbon nanotube composite porous membrane, which solves the problem of high requirements for the preparation process of existing graphene-based carbon materials

Method used

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  • Preparation method and application of graphene/carbon nanotube composite porous membrane
  • Preparation method and application of graphene/carbon nanotube composite porous membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Disperse 15 mg of cross-linked polystyrene (PS) microspheres (particle size 1-10 μm), 0.15 g of graphene oxide, and 0.15 g of carboxylated carbon nanotubes in 100 mL of deionized water by ultrasonic and magnetic stirring to obtain a suspension ; 50mL suspension was suction filtered to obtain a filter membrane; the filter membrane was placed in an oven and dried at 90°C for 6 hours to obtain a graphene oxide / carbon nanotube / PS microsphere composite membrane; the graphene oxide / carbon nanotube / PS microsphere composite film is sandwiched between graphite plates, placed in an atmosphere furnace for carbonization treatment under an inert atmosphere, the temperature is 700°C, the heating rate is 3°C / min, and the treatment time is 1h, the required graphite can be obtained ene / carbon nanotube composite porous membrane.

[0030] The raw materials used in the present invention are all commercially available products.

[0031] Such as figure 1 and 2 As shown, the prepared grap...

Embodiment 2

[0033] Disperse 0.3g graphene oxide and 0.05g carboxylated carbon nanotubes in 100mL deionized water by ultrasonic and magnetic stirring to obtain a suspension; filter 50mL of the suspension to obtain a filter membrane; place the filter membrane in an oven Dry at 85°C for 5 hours to obtain a graphene oxide / carbon nanotube composite film; the graphene oxide / carbon nanotube-composite film is sandwiched between graphite plates, placed in an atmosphere furnace for carbonization treatment under an inert atmosphere, the temperature 400°C, the heating rate is 2°C / min, and the treatment time is 0.5h, the desired graphene / carbon nanotube composite porous membrane can be obtained.

[0034] The prepared graphene / carbon nanotube composite porous membrane has a thickness of about 50 μm and a density of 0.16 g / cm 3 . The electromagnetic shielding performance in the X-band is tested by the waveguide method on a vector network analyzer, and the obtained electromagnetic shielding effectivenes...

Embodiment 3

[0036] Disperse 50 mg of cross-linked polystyrene (PS) microspheres (with a particle size of 1-10 μm), 0.3 g of graphene oxide, and 0.15 g of carboxylated carbon nanotubes in 100 mL of deionized water by ultrasonic and magnetic stirring to obtain a suspension ; 50mL suspension was suction filtered to obtain a filter membrane; the filter membrane was placed in an oven and dried at 95°C for 7 hours to obtain a graphene oxide / carbon nanotube / PS microsphere composite membrane; the graphene oxide / carbon nanotube / PS microsphere composite film is sandwiched between graphite plates, placed in an atmosphere furnace for carbonization treatment under an inert atmosphere, the temperature is 1000°C, the heating rate is 4°C / min, and the treatment time is 1.5h, the desired Graphene / carbon nanotube composite porous membrane.

[0037] The prepared graphene / carbon nanotube composite porous membrane has a thickness of about 70 μm and a density of 0.07 g / cm 3 . The electromagnetic shielding pe...

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Abstract

The invention discloses a preparation method and application of a graphene / carbon nanotube composite porous membrane, and relates to the technical field of preparation of composite porous membranes. The preparation method comprises the steps of (1) dispersing crosslinked polystyrene (PS) microspheres, graphene oxide and carboxylated carbon nanotubes in a solvent to obtain a suspension; (2) carrying out suction filtration on the suspension to obtain a filter membrane; (3) drying the filter membrane to obtain a graphene oxide / carbon nanotube / PS microsphere composite membrane; and (4) clamping the graphene oxide / carbon nanotube / PS microsphere composite membrane between graphite plates, and performing carbonization treatment in an atmosphere furnace to obtain the required graphene / carbon nanotube composite porous membrane. According to the preparation method, polystyrene microspheres are taken as a template, uniform and non-uniform dispersion of the polystyrene microspheres in the graphene / carbon nanotube composite membrane is realized through suction filtration, and then the template is removed through low-temperature carbonization, so that low-temperature and simple preparation of the graphene / carbon nanotube composite porous membrane is realized.

Description

technical field [0001] The invention relates to the technical field of preparation of composite porous membranes, in particular to a preparation method and application of a graphene / carbon nanotube composite porous membrane. Background technique [0002] The rapid development of wireless communication technology has led to a sharp increase in the number of various high-integration and high-frequency electronic and electrical equipment. Problems such as electromagnetic pollution, electromagnetic interference, and electromagnetic leakage have become increasingly prominent, seriously threatening human health and communication security. Electromagnetic shielding is an effective way to reduce electromagnetic radiation, improve electromagnetic compatibility, and prevent information leakage. The gigahertz (GHz) frequency band covers important fields such as military industry and mobile communication. The development and research of electromagnetic shielding materials for this freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C01B32/184C01B32/168C01B32/174
CPCH05K9/0081C01B32/184C01B32/168C01B32/174
Inventor 李洋刘静静张峰
Owner HUANGHUAI UNIV
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