Graphene oxide/tungsten disulfide composite coating and preparation method and application thereof

A technology of tungsten disulfide and composite coating, which is applied in the direction of coating, metal material coating technology, etc., to achieve the effect of reducing consumption, good bonding force and stable operation process

Inactive Publication Date: 2019-10-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the preparation of graphene / tungsten disulfide composite coating and its synergistic effect to achieve good anti-wear and anti-friction performance at home and abroad are rarely seen in related patents and papers.

Method used

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  • Graphene oxide/tungsten disulfide composite coating and preparation method and application thereof
  • Graphene oxide/tungsten disulfide composite coating and preparation method and application thereof
  • Graphene oxide/tungsten disulfide composite coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Dissolve the graphene oxide powder in deionized water, and ultrasonically disperse it in an ultrasonic disperser with a power of 50W for 2h to obtain a stable dispersion with a graphene oxide concentration of 0.1g / L.

[0033] 2. Then add tungsten chloride and thioacetamide to the dispersion, wherein the concentration of tungsten chloride is 1mmol / L, the concentration of thioacetamide is 1mmol / L, and ultrasonically stirred for 30min (power is 50W).

[0034] 3. Transfer the mixed liquid after ultrasonic stirring to the hydrothermal reaction kettle, and put the brass base material in the reaction kettle at the same time. The reaction kettle was placed in a drying oven, reacted at 180°C for 8 hours, and cooled naturally to room temperature to prepare a graphene oxide / tungsten disulfide composite coating on a brass substrate.

Embodiment 2

[0036] 1. Dissolve the graphene oxide powder in deionized water, and ultrasonically disperse it in an ultrasonic disperser with a power of 80W for 2h to obtain a stable dispersion with a graphene oxide concentration of 0.2g / L.

[0037] 2. Then add tungsten chloride and thioacetamide to the dispersion, wherein the concentration of tungsten chloride is 5mmol / L, the concentration of thioacetamide is 5mmol / L, and ultrasonically stirred for 30min (power is 80W).

[0038] 3. Transfer the mixed liquid after ultrasonic stirring to the hydrothermal reaction kettle, and put the brass base material in the reaction kettle at the same time. The reaction kettle was placed in a drying oven, reacted at 220°C for 16h, and cooled naturally to room temperature to prepare a graphene oxide / tungsten disulfide composite coating on a brass substrate.

[0039] figure 1 SEM photo of the graphene oxide prepared in this embodiment. from figure 1 It can be seen from the figure that the graphene oxide s...

Embodiment 3

[0050] 1. Dissolve the graphene oxide powder in deionized water, and ultrasonically disperse it in an ultrasonic disperser with a power of 100W for 2h to obtain a stable dispersion with a graphene oxide concentration of 0.5g / L.

[0051] 2. Then add tungsten chloride and thioacetamide to the dispersion, wherein the concentration of tungsten chloride is 10mmol / L, the concentration of thioacetamide is 10mmol / L, and ultrasonically stirred for 30min (power is 80W).

[0052] 3. Transfer the mixed liquid after ultrasonic stirring to the hydrothermal reaction kettle, and put the brass base material in the reaction kettle at the same time. The reaction kettle was placed in a drying oven, reacted at 220°C for 20h, and cooled naturally to room temperature to prepare a graphene oxide / tungsten disulfide composite coating on a brass substrate.

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Abstract

The invention discloses a graphene oxide/tungsten disulfide composite coating and a preparation method and application thereof. According to the graphene oxide/tungsten disulfide composite coating, graphene oxide powder is dispersed in deionized water, and dispersion liquid is formed; a sulfur source and a tungsten source are added into the dispersion liquid, ultrasonic stirring is conducted evenly, and mixed liquid is obtained; and the mixed liquid is transferred into a reaction kettle holding a metal substrate, hydrothermal reaction is conducted under the temperature of 120-220 DEG C, natural cooling is conducted, and the graphene oxide/tungsten disulfide composite coating is obtained on the surface of the metal substrate. According to the graphene oxide/tungsten disulfide composite coating and the preparation method and application thereof, reaction conditions are mild, the process is simple, and the prepared graphene oxide/tungsten disulfide composite coating has excellent lubrication performance and abrasion resistance.

Description

technical field [0001] The invention belongs to the technical field of material surface engineering, and more specifically relates to a graphene oxide / tungsten disulfide composite coating and its preparation method and application. Background technique [0002] With the rapid development of modern aerospace, high-speed trains, automobiles, and advanced weapon systems, traditional metal-based solid self-lubricating composites have severely limited their application in harsh conditions due to poor mechanical properties and easy wear. The hydrothermal method is a method of preparing materials by dissolving and recrystallizing powder in a sealed pressure vessel with water as a solvent. The preparation process is simple, the reaction conditions are mild, and the grain size and crystal structure of the prepared materials are controllable. It is widely used in the preparation of composite materials. Graphene oxide is a typical two-dimensional material with a large specific surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
CPCC23C26/00
Inventor 魏冬冬刘灿森揭晓华麦永津张留艳
Owner GUANGDONG UNIV OF TECH
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