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A kind of high thermal conductivity graphene/titanium composite material and preparation method thereof

A technology of high thermal conductivity graphite and composite materials, applied in the field of composite materials, can solve problems such as complex processes, and achieve the effects of strong operability, dense graphene films, and simple methods

Active Publication Date: 2019-01-01
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] When preparing titanium / graphene composite materials, the existing methods are relatively complicated

Method used

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  • A kind of high thermal conductivity graphene/titanium composite material and preparation method thereof
  • A kind of high thermal conductivity graphene/titanium composite material and preparation method thereof
  • A kind of high thermal conductivity graphene/titanium composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. S101, configure graphene oxide colloid: dissolve a certain amount of graphene oxide powder in deionized water, configure graphene oxide colloid with a concentration of 7mg / mL, add NaOH to adjust the pH of the colloid to 7, and add NaCl electrolyte to a concentration of 0.05 molar / Lift;

[0051] 2. S102, Electrochemical reduction of graphene oxide: use the method of electrochemical reduction of graphene oxide to prepare graphene film on Ti substrate, use Ti substrate as working electrode, platinum as counter electrode, and saturated calomel electrode as reference electrode , and connected to the CHI 760E electrochemical workstation, put the above three electrodes in the graphene oxide colloid configured in S101, and use continuous potential scanning, the scanning speed is 3mV / s, the voltage window is 0~-1.6V, and the number of cycles 5 times;

[0052] 3. S103, washing the graphene film: using ethanol and deionized water to successively clean the graphene film on ...

Embodiment 2

[0056] 1. S101, prepare graphene oxide colloid and clean titanium substrate: dissolve a certain amount of graphene oxide powder in deionized water, prepare graphene oxide colloid with a concentration of 7mg / mL, add NaOH to adjust the pH of the colloid to 7, add NaCl electrolyte to The concentration is 0.05 mol / liter;

[0057] 2. S102, Electrochemical reduction of graphene oxide: use the method of electrochemical reduction of graphene oxide to prepare graphene film on Ti substrate, use Ti substrate as working electrode, platinum as counter electrode, and saturated calomel electrode as reference electrode , and connected to the CHI 760E electrochemical workstation, put the above three electrodes in the graphene oxide colloid configured in S101, and use continuous potential scanning, the scanning speed is 3mV / s, the voltage window is 0~-1.6V, and the number of cycles for 10 times;

[0058] 3. S103, washing the graphene film: using ethanol and deionized water to successively c...

Embodiment 3

[0062] 1. S101, prepare graphene oxide colloid and clean titanium alloy substrate: dissolve a certain amount of graphene oxide powder in deionized water, configure graphene oxide colloid with a concentration of 35 mg / mL, add ammonia water to adjust the pH of the colloid to 6.5, add Na 2 SO 4 Electrolyte to a concentration of 0.1 mol / L;

[0063] 2. S102, Electrochemical reduction of graphene oxide: Graphene film was prepared on TC4 (a titanium alloy) substrate by electrochemical reduction of graphene oxide, with TC4 substrate as the working electrode, graphite as the counter electrode, saturated Gan The mercury electrode is used as the reference electrode, and it is connected to the CHI 760E electrochemical workstation. The above three electrodes are placed in the graphene oxide colloid configured in S101, and continuous potential scanning is adopted. The scanning speed is 10mV / s, and the voltage window is 0~ -1.6V, the number of cycles is 20 times;

[0064] 3. S103, washi...

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Abstract

The invention provides a preparation method of a high-thermal-conductive grapheme-titanium composite material. Grapheme film is prepared on the surface of a titanium or titanium alloy substrate through an electrochemical reduction technology, and then the grapheme-titanium composite material is prepared. The preparation method is simple, reliable and high in operability; a chemical reducing agent is not used, and therefore pollution of chemicals is reduced; the reducing process and the film forming process are completed through one step, and the prepared grapheme film is compact, uniform and controllable in thickness. The thermal conductivity of the grapheme-titanium composite material prepared through the method is significantly improved, and the application range of titanium or titanium alloy can be further widened.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a high thermal conductivity graphene / titanium composite material and a preparation method thereof. Background technique [0002] Titanium and titanium alloys are widely used in aerospace, aviation, automobile and other fields because of their advantages of high strength, low density and good corrosion resistance. However, the thermal conductivity of titanium and titanium alloys is poor, and its thermal conductivity at room temperature is only 5-21W / (m·K), which greatly limits its application range. If the thermal conductivity of titanium and titanium alloys can be improved, their application range will be wider. [0003] Graphene is a new type of two-dimensional material, which has attracted wide attention because of its excellent mechanical, thermal, optical, electrical and other properties. The theoretical thermal conductivity of graphene is 3000-5000W / (m·K), and the experi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00C25D9/04C01B32/184
CPCC01B2204/32C25B1/00C25D9/04
Inventor 王华涛王静张文英杨新异钟博周薇薇
Owner HARBIN INST OF TECH AT WEIHAI