Preparation method for graphene damping composite material

A damping composite material and composite material technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve the problems of low strength and poor mechanical properties, and achieve excellent damping characteristics and good bending resistance. , the effect of improving mechanical properties

Active Publication Date: 2018-06-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method for graphene damping composite material
  • Preparation method for graphene damping composite material
  • Preparation method for 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 frame, and after compounding with the resin, the mechanical properties can be significantly improved. The graphene / foam metal / polymer composite material with good damping and vibration reduction performance specifically includes the following steps:

[0029] (1) The graphene / foam metal composite material is obtained by coating graphene on the metal foam framework, and the preparation method can be through chemical vapor deposition (CVD) and chemical bonding;

[0030] (2) The graphene / foam metal / polymer composite material is prepared. The preparation method can be one of a vacuum-assisted resin transfer molding process, high-temperature injection molding, or resin impregnation.

Embodiment 1

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

[0034] (1) CVD growth of graphene on a nickel foam substrate. The surface density of foamed nickel is 380g / m 2 , The thickness is 1.9mm, the open-pore structure, the pore diameter is 100-400μm, the porosity is 95%, and the number of graphene layers is 3-5. Put the cleaned nickel foam into the center of the horizontal tube reactor (Lindberg Blue M, HTF55347C, outer diameter 75mm, inner diameter 72mm), and place it in the center of the H 2 Heat to 1000℃ and treat for 15 minutes in the atmosphere, H 2 The flow rate is 500 sccm. Enter CH after heat treatment 4 CVD growth started under normal pressure with Ar and 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%. After 30 minutes of growth, CH 4 Close, push the sample out of the high temperature zone of the ...

Embodiment 2

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

[0039] (1) The graphene is coated on the aluminum foam metal. The aluminum foam has an open-cell structure and its porosity is 98%. Use acetic acid with a concentration of 5 wt% to clean the foamed aluminum, and after drying, use an industrial alkali solution with a concentration of 50 mg / ml to clean and soak the foamed magnesium for 1 hour, repeatedly wash with water and dry.

[0040] (2) Carry out silanization treatment on the aluminum foam metal, use γ-aminopropyltriethoxysilane (using a 10wt% aqueous solution) silane coupling agent to soak the aluminum foam for 2 hours, then take it out, and place it in an oven at 120°C. Dry for 1 hour to obtain silanized aluminum foam.

[0041] (3) Select graphene oxide as the raw material, use sodium hydroxide and monochloroacetic acid to carboxylate graphene oxide, the ratio is ...

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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 method for preparing graphene damping composite materials. Background technique [0002] Damping material is a new type of functional material that can absorb vibrational mechanical energy and convert it into heat energy for dissipation. The principle that the damping material transforms kinetic energy into heat energy during deformation reduces the resonance amplitude of the structure, thereby increasing the fatigue life and reducing the structure noise. Damping materials are widely used in vibration and noise reduction in the fields of transportation, 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, mechanical energy is converted into heat energy and consumed by internal f...

Claims

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Application Information

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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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