Graphene/polymer three-dimensional foam substrate, and preparation method and application thereof

A graphene and polymer technology, applied in the field of graphene foam composite materials, can solve the problems of graphene interlayer stacking, poor mechanical properties, volume shrinkage, etc., and achieve the effects of simple preparation process, excellent electrical conductivity, and easy implementation.

Active Publication Date: 2017-12-15
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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AI Technical Summary

Problems solved by technology

[0003] However, the 3D graphene grown on metal foam by chemical vapor deposition (CVD) has poor mechanical properties after removing the catalyst support, and the phenomenon of graphene interlayer stacking will occur during the drying process, thereby lead to volume shrinkage, collapse
Furthermore, when combined with other materials, 3D graphene is prone to irreversible deformation, damage, etc. without support, and its mechanical strength is poor, which often cannot give full play to the excellent performance and application value of 3D graphene.

Method used

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  • Graphene/polymer three-dimensional foam substrate, and preparation method and application thereof

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preparation example Construction

[0024] A method for preparing a graphene / polymer three-dimensional foam matrix provided by an aspect of the embodiments of the present invention includes:

[0025] A carbon source is introduced by chemical vapor deposition (CVD), and graphene is grown on the metal foam catalyst to form a three-dimensional graphene / metal foam catalyst composite;

[0026] The metal foam catalyst skeleton in the three-dimensional graphene / foam metal catalyst composite is replaced by a polymer by a template replacement method to obtain a flexible graphene / polymer three-dimensional foam matrix.

[0027] As one of the preferred schemes, the preparation method specifically includes:

[0028] Forming polymethyl methacrylate (PMMA) protective layer and filling layer respectively in the surface and pore structure of described three-dimensional graphene / foam metal catalyst composite;

[0029] removing the metal foam catalyst framework in the composite with an etchant to form a three-dimensional framewor...

Embodiment 1

[0058] Embodiment 1: refer to figure 1 As shown, put nickel foam in a quartz tube, then put it into a tube furnace, raise the temperature in the tube furnace to 1000°C, and keep it for 10 minutes. At this time, the atmosphere environment is: methane is 30 sccm, hydrogen is 200 sccm, The argon gas is 200 sccm, and the gas pressure is normal pressure. After the growth is completed, the quartz tube is taken out and cooled to room temperature, and then the anisole solution with a concentration of about 4wt% PMMA is coated on the surface of the nickel foam for growing graphene, dried, and put into 1M FeCl 3 / 0.1M HCl solution for etching, washed with water and dried, and finally soaked in polydimethylsiloxane (PDMS), vacuumized, kept for 2 hours, cured at 80 ° C, and then in acetone solution at about 50 ° C Soak in medium for about 24 hours, remove the PMMA protective layer, and dry to form a graphene / PDMS three-dimensional foam matrix. The electrical conductivity of the foam mat...

Embodiment 2

[0059] Embodiment 2: refer to figure 1 As shown, put copper foam in a quartz tube, then put it into a tube furnace, raise the temperature in the tube furnace to 1000°C, and keep it for 10 minutes. At this time, the atmosphere environment is: methane is 30 sccm, hydrogen is 200 sccm, The argon gas is 200 sccm, and the gas pressure is maintained at 10 torr. After the growth is completed, the quartz tube is taken out and cooled to room temperature, and then the anisole solution of PMMA is coated on the copper foam surface of the graphene growth, dried, and put into 1M FeCl 3 / 0.1M HCl solution for etching, and washing and drying, and finally soaked in styrene-butadiene rubber, vacuumized, kept for 2 hours, cured at 80°C, and then soaked in acetone solution at about 50°C for 24 hours to remove PMMA The protective layer is dried to form a graphene / styrene-butadiene rubber three-dimensional foam matrix. The conductivity of the foam matrix is ​​about 1-10 S / m, the thermal conductivi...

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Abstract

The invention discloses a graphene/polymer three-dimensional foam substrate, and a preparation method and application thereof. The preparation method comprises: growing graphene on a foam metal catalyst through a chemical vapor deposition method to form three-dimensional graphene/foam metal catalyst compound; and replacing the foam metal catalyst skeleton in the three-dimensional graphene/foam metal catalyst compound with polymer through a template displacement method to obtain a soft graphene/polymer three-dimensional foam substrate. The foam substrate is simple in preparation process, easy to apply, low in cost, and high in yield. The obtained foam substrate has excellent electric conductive and thermal conductive performance, is high in mechanical strength, and can be used as an electrode and a composite system and widely applied in fields of water treatment, biological medicines, energy storage devices, static resistance, thermal management, heat conduction and dissipation, transducers, electromagnetic shielding, wave absorption and catalysis.

Description

technical field [0001] The invention relates to a graphene / polymer three-dimensional foam matrix, in particular to a graphene / polymer three-dimensional foam matrix, its preparation method and application, and belongs to the technical field of graphene foam composite materials. Background technique [0002] Three-dimensional graphene is a three-dimensional network structure based on two-dimensional graphene sheets formed by spatial cross-linking. In addition to the inherent properties of two-dimensional graphene, three-dimensional graphite has unique characteristics in terms of spatial heat conduction, electrical conduction, and macro-mass high-quality preparation. Advantage. In 2011, Chenghuiming Group of Shenyang Institute of Metals produced three-dimensional graphene with nickel foam as a template. This three-dimensional graphene and silicone rubber composite system showed excellent electrical conductivity and mechanical properties. Afterwards, 3D graphene has attracted e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08K3/04C08J9/26
CPCC08J9/26C08J2333/12C08K3/04C08L2203/14C08L33/12
Inventor 刘立伟李伟伟张慧涛徐建宝胡俊雄李奇陈明亮郭玉芬
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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