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A kind of preparation method of graphene damping composite material

A technology of damping composite materials and composite materials, which is applied in the direction of metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of low strength and poor mechanical properties, and achieve excellent damping characteristics and good bending resistance , good vibration damping effect

Active Publication Date: 2020-05-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polymer materials have good damping performance (damping ratio is 0.1-10), they generally have the disadvantages of poor mechanical properties (such as low strength), so it is difficult to be used as a vibration-damping material in large-scale mechanical structures.

Method used

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  • A kind of preparation method of graphene damping composite material
  • A kind of preparation method of graphene damping composite material
  • A kind of preparation method of graphene damping composite material

Examples

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preparation example Construction

[0028] In the specific implementation process, the preparation method of the graphene damping composite material of the present invention can significantly improve the damping performance of the foam metal by coating the graphene on the foam metal skeleton, and after compounding with the resin, the mechanical properties can be significantly improved And a graphene / foam metal / polymer composite material with good damping and vibration reduction properties, specifically comprising the following steps:

[0029] (1) Obtain graphene / foam metal composite material by coating graphene on the metal foam skeleton, the preparation method can be by chemical vapor deposition method (CVD method) and the method of chemical bonding;

[0030] (2) preparing the graphene / foam metal / polymer composite material, the preparation method may be one of the methods of vacuum-assisted resin transfer molding, high-temperature injection molding or resin impregnation.

Embodiment 1

[0033] In this embodiment, the specific process and process parameters for the preparation of the graphene damping composite material are:

[0034] (1) CVD growth of graphene on nickel foam substrate. The surface density of foamed nickel is 380g / m 2 , with a thickness of 1.9 mm, an open-pore structure, a pore diameter of 100-400 μm, a porosity of 95%, and a graphene layer of 3-5 layers. Put the cleaned nickel foam into the center of a horizontal tube reactor (Lindberg Blue M, HTF55347C, outer diameter 75mm, inner diameter 72mm), and 2 heated to 1000°C in an atmosphere and treated for 15 minutes, H 2 The flow rate is 500 sccm. After the heat treatment is completed, CH is introduced 4 and Ar under normal pressure to start CVD growth, CH in the atmosphere 4 , Ar and H 2 The flow rates are respectively 100sccm, 200sccm and 50sccm, CH 4 The volume ratio in the total gas flow is 28%. CH 4 Close, push the sample out of the high temperature zone of the furnace for rapid cooli...

Embodiment 2

[0038] The difference from Example 1 is that in this example, the specific process and process parameters for the preparation of the graphene damping composite material are:

[0039] (1) Graphene is coated on the foamed aluminum metal, and the foamed aluminum is an open-pore structure with a porosity of 98%. The foamed aluminum is cleaned with 5 wt% acetic acid, dried, and then washed and soaked with an industrial alkali solution with a concentration of 50 mg / ml for 1 hour, washed with water repeatedly, and then dried.

[0040] (2) Carry out silanization treatment to foamed aluminum metal, use gamma-aminopropyltriethoxysilane (adopting the aqueous solution that concentration is 10wt%) silane coupling agent to soak foamed aluminum for 2 hours and take out, in the baking oven of 120 ℃ Dry for 1 hour to obtain silanized aluminum foam.

[0041] (3) Select graphene oxide as raw material, use sodium hydroxide and monochloroacetic acid to carry out carboxylation treatment on graphen...

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Abstract

The invention specifically relates to a preparation method for a graphene damping composite material, belonging to the field of application of graphene composite materials. With graphene or graphene oxide as a raw material, graphene coats a foam metal framework in the manner of chemical vapor deposition or chemical coating, and resin is injected into the foam metal framework coated with a thin graphene layer so as to obtain the graphene / foam metal / polymer composite material. Thus, the damping performance of foam metal can be significantly improved by coating the foam metal framework with the graphene, and after compounding of the foam metal framework with the resin, the graphene / foam metal / polymer composite material with significantly improved mechanical performance and good damping performance can be obtained. The preparation method for the graphene damping composite material has the technical characteristics of simple process, good repeatability, remarkable application effect and thelike.

Description

technical field [0001] The invention relates to the application field of graphene composite materials, in particular to a preparation method of graphene damping composite materials. Background technique [0002] Damping material is a new type of functional material that can absorb vibration mechanical energy and convert it into heat energy and dissipate it. The principle that the damping material converts kinetic energy into heat energy during deformation is used to reduce the resonance amplitude of the structure, thereby increasing fatigue life and reducing structural noise. Damping materials are widely used in vibration and noise reduction in vehicles, industrial machinery, construction and civil engineering, household appliances, precision instruments and military equipment. [0003] Polymer is a kind of traditional damping material. When it is subjected to external alternating stress, the mechanical energy is converted into heat energy through the internal friction of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/10C08K3/04C08K7/24C08K9/06C08K9/04C08K9/02C23C16/26
CPCC08K3/04C08K7/24C08K9/02C08K9/04C08K9/06C08K9/10C23C16/26C08L63/00
Inventor 曾尤王函英哲马超群成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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