Layered composite material as well as preparation method and application thereof
A layered composite material, graphene layer technology, applied in the direction of nanotechnology for materials and surface science, heat exchange materials, chemical instruments and methods, etc., can solve the problem of large thermal expansion coefficient of copper size, etc., to achieve simple operation , avoid reunion, high safety factor effect
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Embodiment 1
[0032] A method for preparing a layered composite material, the method comprising the steps of:
[0033] Step 1: Prepare graphene oxide (GO) dispersion liquid. Graphene oxide (GO) is an oxide of graphene, and its surface contains various oxygen-containing groups such as hydroxyl group and carboxyl group. Because these polar functional groups can interact with water molecules, GO has good dispersibility in water solvents, and a GO dispersion close to a solution can be obtained. Weigh 40 mg of GO into a reagent bottle containing 40 ml of deionized water, and ultrasonically disperse for 60 min to obtain a GO dispersion with a concentration of 1 mg / ml.
[0034] Step 2, configuring copper sulfate plating solution: uniformly disperse brightener (sodium chloride), sulfuric acid and copper sulfate in water, with a mass ratio of 0.05:8:200:1000. Use an ultrasonic device to uniformly disperse each substance in water to obtain a copper sulfate plating solution;
[0035] Step 3: Adopt t...
Embodiment 2
[0039] The thermal conductivity test was carried out on the layered composite material obtained in Example 1, and the thermal conductivity of the material was calculated by measuring the thermal diffusivity, density and specific heat capacity. In this experiment, a NETZSCH LFA 467 MicroFlash laser thermal conductivity meter was used to measure the thermal diffusivity, and a TA Q20 instrument was used to test the specific heat capacity by the sapphire method. The thermal conductivity is 410W / mK.
[0040] The SEM photos of the metal copper / RGO two-layer structure that step 4 obtains in embodiment 1 are respectively figure 1 As shown, the wrinkled structure is graphene, and the deposition time of RGO in Example 1 is short and the number of layers is small.
Embodiment 3
[0042] This example relates to a method for preparing a Cu / RGO / Cu thermally conductive composite material, the method comprising the following steps:
[0043] Step 1: Prepare graphene oxide (GO) dispersion liquid. Graphene oxide (GO) is an oxide of graphene, and its surface contains various oxygen-containing groups such as hydroxyl group and carboxyl group. Because these polar functional groups can interact with water molecules, GO has good dispersibility in water solvents, and a GO dispersion close to a solution can be obtained. Weigh 40 mg of GO into a reagent bottle containing 400 ml of deionized water, and ultrasonically disperse for 60 min to obtain a GO dispersion with a concentration of 1 mg / ml.
[0044] Step 2, configuring copper sulfate plating solution: uniformly disperse brightener (sodium chloride), sulfuric acid and copper sulfate in water, with a mass ratio of 0.05:8:200:1000. Use an ultrasonic device to uniformly disperse each substance in water to obtain a cop...
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