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A preparation method of double-functional graphene paper that takes into account both sound insulation and electromagnetic shielding

A graphene paper, electromagnetic shielding technology, applied in graphene, chemical instruments and methods, nano-carbon and other directions, can solve the problems of complex preparation process, single performance, product size limited by equipment, etc., to achieve simple process, electrical conductivity and thermal conductivity. Excellent and promising results for a wide range of applications

Active Publication Date: 2019-03-26
SHENZHEN STRONG ADVANCED MATERIALS RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of complex preparation process of existing graphene paper, limited product size by equipment, and single performance, and provides a method for preparing graphene paper with dual functions of sound insulation and electromagnetic shielding based on freeze-drying method

Method used

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  • A preparation method of double-functional graphene paper that takes into account both sound insulation and electromagnetic shielding
  • A preparation method of double-functional graphene paper that takes into account both sound insulation and electromagnetic shielding
  • A preparation method of double-functional graphene paper that takes into account both sound insulation and electromagnetic shielding

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specific Embodiment approach 1

[0028] Specific implementation mode one: a kind of preparation method that considers sound insulation and electromagnetic shielding bifunctional graphene paper described in this implementation mode is specifically carried out according to the following steps:

[0029] 1. Synthesis of graphene oxide: Add 5g of natural flake graphite to 400mL of sulfuric acid and phosphoric acid mixed acid to prepare a mixture. Stir the mixture for 30min at a stirring speed of 450r / min, and then add 5 to the stirred mixture. Subequal amounts of potassium permanganate were added at equal time intervals (the time interval was 5 minutes) to obtain the mixture after the addition of potassium permanganate, and then in a water bath at a temperature of 50°C, stirring at a constant temperature of 450r / min and a stirring speed of 6h, Then add ice water, and add hydrogen peroxide with a mass fraction of 40% to the ice water to obtain a suspension, suction filter, centrifugal washing, and dry at 80° C. for ...

specific Embodiment approach 2

[0042] Specific embodiment two: a kind of preparation method that considers sound insulation and electromagnetic shielding dual-function graphene paper described in this embodiment is specifically carried out according to the following steps:

[0043] 1. Synthesis of graphene oxide: add 10g of natural flake graphite to 300mL of sulfuric acid and phosphoric acid mixed acid to prepare a mixture, stir the mixture for 30min at a stirring speed of 700r / min, and then divide 6 into the stirred mixture Subequal amounts of potassium permanganate were added at equal time intervals (the time interval was 10 min) to obtain the mixture after the addition of potassium permanganate, and then in a water bath at a temperature of 60 ° C, stirred at a constant temperature of 550 r / min and a stirring speed of 8 h, Then add ice water, and add hydrogen peroxide with a mass fraction of 40% to the ice water, bright yellow to obtain a suspension, suction filter, centrifugal washing, and dry at 80° C. f...

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Abstract

The invention discloses a preparation method of graphene paper having both a soundproof function and an electromagnetic shielding function, belongs to the field of graphene paper and aims to solve the problems that existing graphene paper preparation processes are complex, product size is limited by equipment and performance is unitary. The preparation method includes: 1, freeze-drying to obtain graphene oxide powder; 2, reducing the graphene oxide powder; 3, thermally sintering the graphene powder; 4, pressing to form the graphene paper. The preparation method can prepare large-size double-shielding-function samples and can be widely applied in the military field of aviation, aerospace and navigation.

Description

technical field [0001] The invention belongs to the technical field of graphene paper; in particular, it relates to a preparation method of graphene paper with dual functions of sound insulation and electromagnetic shielding. Background technique [0002] Graphene, a two-dimensional honeycomb lattice structure composed of only a single layer of carbon atoms tightly packed, has excellent electrical, mechanical and thermal properties due to its unique two-dimensional crystal structure. The transmission of free electrons on graphene is not easy to scatter, and the electron mobility can reach 2×105cm / V s, which is more than one hundred times that of silicon; its conductivity is as high as 106S / m, which is the best at room temperature. conductive material. The elastic modulus of graphene is as high as 1TPa, the fracture strength is 125GPa, the thermal conductivity at room temperature is 5.3×103W / m K, and the specific surface area is 2630m 2 / g. Graphene also has excellent opti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/194
CPCC01B2204/22C01B2204/32C01P2004/01C01P2006/10C01P2006/42
Inventor 李宜彬李莹杨志宇赫晓东
Owner SHENZHEN STRONG ADVANCED MATERIALS RES INST CO LTD
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