Method for preparing graphene film on surface of titanium alloy

A graphene film, titanium alloy technology, applied in metal material coating process, solid-state chemical plating, coating and other directions, can solve the problems of easy detachment of the film and insufficient bonding force, and achieve biological tribological performance and wear resistance. Good performance, low cost, mild reaction effect

Inactive Publication Date: 2014-09-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene itself is relatively stable. If a film is deposited directly on the surface of titanium alloy, the bonding force between the substrate and the film is not strong enough, and the formed film is easy to fall off during the friction process.

Method used

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  • Method for preparing graphene film on surface of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for a titanium alloy surface graphene film, comprising the following steps:

[0030] a. The polished titanium alloy Ti 6 al 4 Put V into 70% isopropanol solution and ultrasonically for 30min, here Ti 6 al 4 Ti can also be used for V 6 al 7 Nb or Ti 12 Mo 5 Replace it with Ta; wash it with ultrapure water for 5 times, then slowly put it into the piranha solution for 10 minutes, take it out and put the treated titanium alloy into the new piranha solution for 5 minutes again, so that the surface of the titanium alloy is hydroxylated.

[0031] b. After the hydroxylated titanium alloy was washed 5 times with deionized water, it was placed in an aminosilane solution with a propyltrimethoxysilane content of 2 mmol / L to self-assemble a silane film for 2 hours.

[0032] c. Put the graphene oxide powder into distilled water and disperse it by ultrasonic wave for 30 minutes to obtain a stable graphene oxide colloid with a concentration of 0.1 mg / mL.

...

Embodiment 2

[0039] A preparation method for a titanium alloy surface graphene film, comprising the following steps:

[0040] a. The polished titanium alloy Ti6 al 4 Put V into a 70% isopropanol solution and sonicate for 60min, where Ti 6 al 4 Ti can also be used for V 6 al 7 Nb or Ti 12 Mo 5 Ta is replaced, and then rinsed with ultrapure water for 3 times, and then slowly put into the piranha solution for 30 minutes. After taking it out, put the treated titanium alloy into the new piranha solution for 10 minutes again, so that the surface of the titanium alloy is hydroxylated.

[0041] b. After the hydroxylated titanium alloy was washed 5 times with deionized water, it was placed in an aminosilane solution with a propyltrimethoxysilane content of 0.5 mmol / L to self-assemble a silane film for 12 hours.

[0042] c. Put the graphene oxide powder into distilled water and disperse it by ultrasonic wave for 2 hours to obtain a stable graphene oxide colloid with a concentration of 2 mg / mL....

Embodiment 3

[0049] A preparation method for a titanium alloy surface graphene film, comprising the following steps:

[0050] a. The polished titanium alloy Ti 6 al 4 Put V into 70% isopropanol solution and sonicate for 45min, where Ti 6 al 4 Ti can also be used for V 6 al 7 Nb or Ti 12 Mo 5 Replace it with Ta, rinse it with ultrapure water for 3 times, and then slowly put it into the piranha solution for 20 minutes. After taking it out, put the treated titanium alloy into the new piranha solution for 5 minutes again to make the surface of the titanium alloy hydroxylated.

[0051] b. After the hydroxylated titanium alloy was washed three times with deionized water, it was put into an aminosilane solution with a propyltrimethoxysilane content of 2 mmol / L to self-assemble a silane film for 2 hours.

[0052] c. Put the graphene oxide powder into distilled water and disperse it by ultrasonic wave for 30 minutes to obtain a stable graphene oxide colloid with a concentration of 0.1 mg / mL....

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Abstract

The invention discloses a method for preparing a graphene film on the surface of titanium alloy. The method specifically comprises the following steps of putting a medical titanium alloy into a piranha solution and carrying out hydroxylation treatment, and then putting into an amino silane solution, and self-assembling a silane film; carrying out ultrasonic treatment on graphene oxide powder to obtain a stable graphene oxide colloid; immersing the titanium alloy of which the surface is attached with the silane film in the graphene oxide colloid to prepare a silane-graphene oxide film; and finally, reducing the graphene oxide film with hydrogen halide acid, and drying to obtain the reduced graphene oxide composite film. The method disclosed by the invention is simple and causes no harm to experiment operators, and the obtained film has the advantages of good integrity, high strength, low coefficient of friction and excellent wear resistance and is expected to become a medical joint material.

Description

technical field [0001] The invention belongs to the technical field of performance improvement of titanium alloy materials, and relates to a method for preparing a thin film on the surface of titanium alloy to improve the tribological performance of the titanium alloy surface. Background technique [0002] Titanium alloys are widely used in aviation and aerospace, petrochemical and other fields because of their good comprehensive mechanical properties and corrosion resistance. Because titanium alloy has good biocompatibility, high specific strength and excellent fatigue resistance, coupled with its low elastic modulus similar to that of bone, it can effectively transfer the load to the surrounding healthy bone, which can Titanium alloys are used for articular bone materials. [0003] However, due to the relatively high chemical affinity of titanium, it is easy to produce adhesion on the friction surface, resulting in an increase in the friction coefficient. The titanium ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/06
Inventor 程先华刘祖汉李鹏飞王传英孙志勇
Owner SHANGHAI JIAO TONG UNIV
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