Silver-loaded graphene/copper self-lubricating material and preparation method thereof

A self-lubricating material, graphene technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve problems such as agglomeration, wrinkling, deterioration of material use, etc., to achieve increased hardness, friction The effect of decreasing the coefficient and improving dispersibility

Inactive Publication Date: 2021-10-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because graphene has a large specific surface area and interlayer van der Waals force, it is prone to wrinkles and agglomeration, and introducing it into metals will seriously deteriorate the use of the material.

Method used

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  • Silver-loaded graphene/copper self-lubricating material and preparation method thereof
  • Silver-loaded graphene/copper self-lubricating material and preparation method thereof
  • Silver-loaded graphene/copper self-lubricating material and preparation method thereof

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preparation example Construction

[0031] A kind of preparation method of the graphene / copper self-lubricating material loaded with silver of the present invention comprises the following steps:

[0032] Step 1: Weigh 0.05-0.15g of graphene nanosheets with 5-15 layers, 0.05-0.15g of sodium lauryl sulfate, stir and mix, add to 30-50ml of dimethylformamide, and ultrasonically disperse for 100 ~140min.

[0033] Step 2: Prepare 1mol / L~4mol / L AgNO 3 solution.

[0034] Step 3: Mix 8-15ml of the AgNO in Step 2 3 Pour the solution into the mixed liquid after ultrasonic dispersion in step 1, and then ultrasonically disperse for 2-3 hours.

[0035] Step 4: Heating the mixed solution in Step 3 at 60-90° C. for 0.5-2 hours; washing with deionized water and absolute ethanol in sequence, filtering and drying to obtain silver-loaded graphene.

[0036] Step 5: Take a certain amount of copper powder with a 325-mesh sieve, i.e. copper powder and silver-loaded graphene with a particle size below 0.0450mm, so that the silver-l...

Embodiment 1

[0043] A silver-loaded graphene / copper-based friction material of the present invention specifically comprises the following steps:

[0044] Step 1: Weighing 0.1 g of graphene nanosheets with 5 to 15 layers, and weighing 0.1 g of sodium lauryl sulfate powder at the same time. Stir and mix the weighed graphene nanosheets and sodium lauryl sulfate powder with a glass rod to obtain a mixed powder. Measure 30ml of dimethylformamide liquid, pour it into the above mixed powder, stir and ultrasonically disperse for 120min to obtain a mixed liquid.

[0045] Step 2. Weigh 1.7gAgNO 3 powder, dissolved in 10ml deionized water to prepare 1mol / L AgNO 3 solution, and then poured into the mixed liquid obtained in step 1, stirred, and ultrasonically dispersed for 30 minutes.

[0046]Step 3. Put the mixed solution obtained in Step 2 into a water bath heater, heat it from room temperature to 70° C., and keep it warm for 30 minutes.

[0047] Step 4, the liquid heated in a water bath is left ...

Embodiment 2

[0075] A silver-loaded graphene / copper-based friction material of the present invention specifically comprises the following steps:

[0076] Step 1: Weighing 0.1 g of graphene nanosheets with 5 to 15 layers, and weighing 0.1 g of sodium lauryl sulfate powder at the same time. Stir and mix the weighed graphene nanosheets and sodium lauryl sulfate powder with a glass rod to obtain a mixed powder. Measure 40ml of dimethylformamide liquid, pour it into the above mixed powder, stir and ultrasonically disperse for 110min to obtain a mixed liquid.

[0077] Step 2. Weigh 3.4gAgNO 3 powder, dissolved in 10ml deionized water to prepare 2mol / L AgNO 3 solution, and then poured into the mixed liquid obtained in step 1, stirred, and ultrasonically dispersed for 2.5 hours.

[0078] Step 3. Put the mixed solution obtained in Step 2 into a water bath heater, heat it from room temperature to 60° C., and keep it warm for 1.5 hours.

[0079] Step 4, the liquid heated in a water bath is left t...

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Abstract

The invention provides a silver-loaded graphene/copper self-lubricating material and a preparation method thereof. The method comprises the following steps: dispersing graphene nanosheets and sodium dodecyl sulfate in dimethylformamide, wherein the ratio of the graphene nanosheets to the sodium dodecyl sulfate to the dimethylformamide is (0.05-0.15) g: (0.05-0.15) g: (30-50) ml, and obtaining a dispersion liquid; uniformly dispersing an AgNO3 solution and the dispersion liquid to obtain a precursor solution, carrying out hydrothermal treatment on the precursor solution at 60-90 DEG C, then separating precipitates in the obtained mixed system, and then washing and drying the precipitates to obtain silver-loaded graphene; and uniformly mixing the silver-loaded graphene with copper powder, then carrying out sintering treatment in a vacuum hot-pressing sintering furnace at 700-800 DEG C, and then cooling the mixture along with the furnace to obtain the silver-loaded graphene/copper self-lubricating material.

Description

technical field [0001] The invention belongs to the technical field of preparation of copper-based self-lubricating materials, in particular to a silver-loaded graphene / copper self-lubricating material and a preparation method thereof. Background technique [0002] It is inevitable to use self-lubricating materials in vehicles and industrial production to overcome the friction generated during the operation of machinery. This is because the existence of friction in the mechanical system will reduce the service life of parts and consume a lot of friction self-lubricating Material. Therefore, how to effectively control and reduce the harm caused by friction in the industrial production process is particularly important. [0003] Copper has high thermal conductivity, electrical conductivity, and good corrosion resistance, but its low hardness, low strength, and poor tribological properties limit its application. Therefore, it is necessary to add modified materials to it to cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/05C01B32/194B82Y40/00B82Y30/00B22F9/24B22F3/14B22F1/00
CPCC22C9/00C22C1/05B22F3/14B22F9/24B82Y40/00B82Y30/00C01B32/194
Inventor 贾均红蔡粮臣孙航杨鑫然闵振龙白甘雨张宝察
Owner SHAANXI UNIV OF SCI & TECH
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