Graphene oxide modified nano additive and application thereof to lubricating oil

A nano-additive, graphene technology, applied in the direction of additives, petroleum industry, lubricating composition, etc.

Active Publication Date: 2016-05-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports involving the covalent attachment of polymeric phosphate esters (PPEs) to carbon nanomaterials and the use of such modified carbon nanomaterials as high-temperature lubricating oil additives.

Method used

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  • Graphene oxide modified nano additive and application thereof to lubricating oil
  • Graphene oxide modified nano additive and application thereof to lubricating oil
  • Graphene oxide modified nano additive and application thereof to lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step (1) Preparation of GO-OH: 100mgGO, 60mL thionyl chloride (SOCl 2 ) and 1.5mL N, N-dimethylformamide (DMF) under the protection of argon, 70 o C reflux reaction for 24h. After the reaction, excess SOCl 2 and the solvent were removed by distillation under reduced pressure. The remaining solid did not need further purification, and was directly flashed with anhydrous ethylene glycol (80 mL) at 80 o C reacted for 24h. The reacted suspension was filtered with suction and washed several times with anhydrous tetrahydrofuran (THF). The remaining solids were vacuum 40 o C dried overnight.

[0032] Step (2) Preparation of graphene oxide-poly-3-ethyl-3-hydroxymethyloxetane (GO-PPHO): Add 100 mg GO-OH to 50 mL CH under the protection of argon 2 Cl 2 and 2mL boron trifluoride diethyl ether (BF 3 ·OEt 2 ), sonicate for 20min. Then 20mL of 3-ethyl-3-hydroxymethyloxetane (EHO) was added dropwise into the reaction system through the injection pump over 2h. The reaction ...

Embodiment 2

[0035] Steps (1) (2) are the same as in Embodiment 1.

[0036] Step (3) Preparation of graphene oxide-polymer phosphate esters (GO-PPEs): 100 mg GO-PEHO, 4 mL diphenyl phosphate chloride and 20 mg anhydrous magnesium chloride were added to 50 mL toluene under argon protection. The reaction mixture was at 110 o C stirred the reaction for 15h. The solvent was removed by filtration and washed three times with toluene. After drying, it was redispersed in deionized water, filtered, washed several times, and finally washed three times with ethanol. Vacuum 60 o C dried overnight.

Embodiment 3

[0038] Steps (1) (2) are the same as in Embodiment 1.

[0039] Step (3) Preparation of graphene oxide-polymer phosphate esters (GO-PPEs): 100mg GO-PEHO, 4mL diphenyl phosphate chloride and 20mg anhydrous aluminum chloride were added to 50mL toluene under the protection of argon . The reaction mixture was at 90 o C stirred the reaction for 15h. The solvent was removed by filtration and washed three times with toluene. After drying, it was redispersed in deionized water, filtered, washed several times, and finally washed three times with ethanol. Vacuum 60 o C dried overnight.

[0040] Thermal Stability Evaluation

[0041] Thermal stability was determined by STA449C Jupitersimultaneous TG-DSC. Put the raw material GO in Example 1, the intermediate product GO-PEHO, and the product GO-PPEs 5 mg each into the sample pool, and the test temperature is from 20 to 800 o C, the rate of temperature increase is 10 o C / min, measured under nitrogen atmosphere. The results are atta...

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PUM

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Abstract

The invention discloses a graphene oxide modified nano additive and application thereof. The nano additive is prepared by the following steps: preparation of hydroxylated graphene oxide (GO-OH); preparation of graphene oxide-poly3-ethyl-3- hydroxymethyl oxetane (GO-PPEs); preparation of graphene oxide-polymer phosphate ester (GO-PEHO). One of the characteristics of the nano additive is formation of a stable dispersion in polyether, and the dispersion concentration is greater than that of the graphene oxide. In addition, the nano additive has good thermal stability, and excellent anti-friction wear property at high temperature of 100-175 DEG C.

Description

technical field [0001] The invention relates to a nano-additive based on graphene oxide modification and its application in lubricating oil. Background technique [0002] With the rapid development of turbine engines, automobile industry, agricultural equipment, and microelectronic mechanical industrial equipment, the demand for lubricants that can be effectively used in high-temperature environments is also gradually increasing, and this high-temperature environment has also led to mineral oil-based lubricants. High-quality lubricants cannot be used under such working conditions for a long time. In order to solve these problems, many high-efficiency synthetic lubricants such as polyalphaolefin (PAO) and polyether (PAG) have been developed to meet the needs of high-temperature environments. In addition, there are few anti-friction and anti-wear additives that can be used in high-temperature lubricants, which largely limits the application of high-temperature lubricants. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C10M177/00C10N60/06C10N60/12
CPCC10M125/02C10M177/00C10M2201/041C10M2201/14C10M2209/1033C10N2060/06C10N2060/12
Inventor 王晓波吴新虎刘维民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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