Graphene-containing ionic liquid nanometer composite lubricating membrane

An ionic liquid and nanocomposite technology, applied in lubricating compositions, petroleum industry, additives, etc., to achieve the effect of solving lubrication problems and excellent micro/nano tribological properties

Active Publication Date: 2014-04-16
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This nanocomposite lubricating film can be used to solve the lubrication problem of micro devices such as MEMS

Method used

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  • Graphene-containing ionic liquid nanometer composite lubricating membrane
  • Graphene-containing ionic liquid nanometer composite lubricating membrane
  • Graphene-containing ionic liquid nanometer composite lubricating membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of graphene:

[0030] Prepare 25 mL of 1 mg·mL by ultrasonic dispersion -1 Graphene oxide deionized water dispersion, and then prepare 25mL of 10mg·mL -1 [BMIM][BF 4 ] deionized aqueous solution, the graphene oxide deionized water dispersion and [BMIM][BF 4 ] The deionized aqueous solution is fully mixed under the action of ultrasonic dispersion. Then 17mL of 85wt% hydrazine hydrate was added to the deionized water mixed solution, and stirred and reacted in a 95°C water bath for 2 hours. After the reaction, the solution was naturally cooled to room temperature, washed repeatedly with deionized water, filtered, and then removed by centrifugation. Contains excess [BMIM][BF 4 ] of the supernatant, the graphene after centrifugation was dried at room temperature. Raman spectrum (attached figure 1 ) and infrared absorption spectrum (attached figure 2 ) demonstrated the successful preparation of functionalized graphene.

[0031] Preparation of graphene and...

Embodiment 2

[0036] The preparation of graphene is identical with embodiment 1.

[0037] Under the action of ultrasonic vibration, 5 mg of graphene prepared in Example 1 was dispersed in 50 mL of 2 mg·mL -1 [BMIM][PF 6 ] in acetone solution to obtain 0.1mg·mL -1 / 2mg·mL -1 Dispersions of graphene and ionic liquids in acetone.

[0038] The preparation of the graphene-containing ionic liquid nanocomposite lubricating film was the same as in Example 1. Using the UMT-2MT micro-friction testing machine of the US CETR company under the experimental conditions of 100mN and 2Hz, the micro-friction coefficient when rubbing against a 3mmGCr15 steel ball is 0.09, and the bearing capacity without damage within 1h reaches 300mN (attached image 3 ).

Embodiment 3

[0040] The preparation of graphene is identical with embodiment 1.

[0041] Under the action of ultrasonic vibration, 5 mg of graphene prepared in Example 1 was dispersed in 25 mL of 2 mg·mL -1 [BMIM][PF 6 ] in acetone solution to obtain 0.2 mg·mL -1 / 2mg·mL -1 Dispersions of graphene and ionic liquids in acetone.

[0042] The preparation of the graphene-containing ionic liquid nanocomposite lubricating film was the same as in Example 1. Using the UMT-2MT micro-friction testing machine of the US CETR company under the experimental conditions of 100mN and 2Hz, the micro-friction coefficient when rubbing against a 3mmGCr15 steel ball is 0.136, and the bearing capacity without damage within 1h is 200mN (attached image 3 ).

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Abstract

The invention discloses a graphene-containing ionic liquid nanometer composite lubricating membrane. The graphene-containing ionic liquid nanometer composite lubricating membrane is prepared by the steps of carrying out non-covalent functionalization treatment to graphene through 1-butyl-3-methylimidazolium chloride ionic liquid so as to disperse the obtained graphene in water and an organic solvent stably, mixing and dispersing graphene and 1-octyl-3-methylimidazolium hexafluorophosphate ionic liquid in acetone, and preparing the graphene-containing ionic liquid nanometer composite lubricating membrane from the dispersion liquid through a static absorption manner finally. The nanometer composite lubricating membrane both has high micro-friction bearing capacity of the graphene and low micrometer / nanometer friction coefficient of the ionic liquid, and can be used for solving lubricating problems of micro-components such as MEMS (Micro-electromechanical System) and the like.

Description

technical field [0001] The invention relates to a graphene-containing ionic liquid nanocomposite lubricating film with excellent micro / nano tribological properties. Background technique [0002] With the development of high technologies such as micro-electromechanical systems (MEMS), ultra-high-density disk storage systems, and satellite devices, the requirements for ultra-thin lubricating films applied to them are also higher and higher. The friction and anti-wear performance should also have the physical and chemical properties to work stably under the micro-friction pair clearance. Room temperature ionic liquids composed of anions and cations have the advantages of extremely low volatility, high thermal and chemical stability, and good electrical and thermal conductivity. These characteristics fully meet the performance requirements of high-performance lubricants. Many research results at home and abroad have also reported the excellent macroscopic tribological properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M141/12
Inventor 王立平蒲吉斌薛群基
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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