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Graphene/trimanganese tetraoxide composite nano lubricating additive and synthesis method thereof

A technology of trimanganese tetraoxide and lubricating additives, which is applied in the field of materials, can solve the problems of reducing the lubricating properties of graphene, the loss of carbon atoms in the layer, and performance degradation, etc., achieving excellent and stable lubricating properties, saving load process, and low production costs Effect

Active Publication Date: 2018-03-16
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although chemically modified graphene has good solubility, the introduction of foreign atoms or functional groups is likely to destroy its structure, which significantly reduces its intrinsic performance.
For example, the irregular folds and bends on the edges of graphite sheets, and the destruction and loss of carbon atoms in the layers will reduce the lubricating properties of graphene.

Method used

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  • Graphene/trimanganese tetraoxide composite nano lubricating additive and synthesis method thereof
  • Graphene/trimanganese tetraoxide composite nano lubricating additive and synthesis method thereof
  • Graphene/trimanganese tetraoxide composite nano lubricating additive and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] (1) In an ice bath environment, mix 300g concentrated sulfuric acid and 35g potassium permanganate fully, then slowly add 10g graphite powder, after mixing evenly, raise the temperature to 50°C, and react for 1h to obtain graphite oxide and / or graphite oxide Mixture of alkenes;

[0058](2) Add 80 mL of 30% hydrogen peroxide to reduce the unreacted oxidant in the mixed solution, add 1 L of deionized water to dilute, and then maintain ultrasonic vibration for 1 hour to obtain the graphene oxide mixed solution;

[0059] (3) Under the action of magnetic stirring, slowly add potassium hydroxide solution (20wt%) directly to the graphene oxide mixed solution, adjust the mixed solution to be alkaline, and make its pH=9;

[0060] (4) filter out the solid precipitate in step (3) gained alkaline solution;

[0061] (5) Put the filtered solid precipitate into a blast drying oven, heat up to 170° C., and keep warm for 5 hours to obtain a graphene / manganese tetraoxide composite produ...

Embodiment 2

[0070] (1) In an ice bath environment, fully mix 300g concentrated sulfuric acid and 30g potassium permanganate, then slowly add 10g graphite powder, after mixing evenly, raise the temperature to 50°C for 1h to obtain graphite oxide and / or graphene oxide the mixture;

[0071] (2) Add 80 mL of 30% hydrogen peroxide to reduce the unreacted oxidant in the mixed solution, add 5 L of deionized water to dilute, and then maintain ultrasonic vibration for 1 hour to obtain the graphene oxide mixed solution;

[0072] (3) Under the action of magnetic stirring, slowly add potassium hydroxide solid directly to the graphene oxide mixed solution, adjust the mixed solution to be alkaline, and make its pH=11;

[0073] (4) filter out the solid precipitate in step (3) gained alkaline solution;

[0074] (5) Put the filtered solid precipitate into a blast drying oven, heat up to 170° C., and keep warm for 5 hours to obtain a graphene / manganese tetraoxide composite product;

[0075] (6) Use 3L of...

Embodiment 3

[0078] (1) In an ice-bath environment, fully mix 300g of concentrated sulfuric acid and 35g of potassium permanganate, then slowly add 10g of graphite powder, after mixing evenly, heat up to 45°C and react for 1h to obtain graphite oxide and / or graphene oxide the mixture;

[0079] (2) Add 80 mL of 30% hydrogen peroxide to reduce the unreacted oxidant in the mixed solution, add 1 L of deionized water to dilute, and then maintain ultrasonic vibration for 1 hour to obtain the graphene oxide mixed solution;

[0080] (3) Under the action of magnetic stirring, slowly add potassium hydroxide solid directly to the graphene oxide mixed solution, adjust the mixed solution to be alkaline, and make its pH=11;

[0081] (4) filter out the solid precipitate in step (3) gained alkaline solution;

[0082] (5) Put the filtered solid precipitate into a blast drying oven, heat up to 100° C., and keep warm for 5 hours to obtain a graphene / manganese tetraoxide composite product;

[0083] (6) Use ...

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Abstract

The invention discloses a graphene / trimanganese tetraoxide composite nano lubricating additive and a synthesis method thereof. Specifically, the synthesis method includes: mixing graphite with concentrated sulfuric acid and potassium permanganate in a high mass ratio, and carrying out oxidation reaction to obtain a mixed solution containing graphite oxide and / or graphene oxide; adding hydrogen peroxide into the mixed solution to reduce unreacted potassium permanganate, and adding water for dilution, and conducting ultrasonic treatment for a predetermined period of time to obtain a graphene oxide mixed solution; adjusting the pH of the graphene oxide mixed solution to alkaline, and carrying out reaction to obtain trimanganese tetraoxide and loading it to graphene oxide, and evaporating or filtering the mixture to obtain a solid product; subjecting the solid product to reduction treatment at high temperature to obtain a graphene / trimanganese tetraoxide composite product; and cleaning thegraphene / trimanganese tetraoxide composite product, and then performing ball milling treatment, thus obtaining the graphene / trimanganese tetraoxide composite nano lubricating additive. The method issimple and efficient, and the prepared additive has excellent dispersibility and lubricity.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a graphene / trimanganese tetraoxide composite nano-lubricating additive and a synthesis method thereof. Background technique [0002] With the development of industrial modernization, mechanical equipment is developing towards high speed and heavy load, which poses a higher challenge to the friction reduction and wear resistance of the friction pairs of parts. In order to reduce the friction energy consumption of mechanical equipment and improve the operation stability, the use of lubricating oil has played a great role. Today, the development of lubricating oil and additives has changed from the initial requirements of adapting to mechanical operation to the requirements of environmental protection and energy saving. However, traditional anti-wear additives contain groups such as sulfur and phosphorus, which easily cause metal corrosion and environmental pollution. Graphene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/10C10M177/00C10N30/04C10N30/06
CPCC10M125/10C10M177/00C10M2201/041C10M2201/062C10N2030/04C10N2030/06C10N2020/055C10N2020/06
Inventor 何永勇赵军李英儒毛俊元雒建斌
Owner TSINGHUA UNIV
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