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Preparation method for spherical-graphene lubricant additive and use of spherical-graphene lubricant additive

A technology of lubricating additives and spherical graphite, applied in the directions of additives, lubricating compositions, petroleum industry, etc., can solve the problems of chemical reagent volatilization environment, pollution, affecting the tribological properties of graphene, etc. The effect of elastic deformation ability, good chemical stability

Active Publication Date: 2018-06-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the chemical modification method can improve the compatibility of graphene and the composite matrix to a certain extent, the structure of graphene is easily destroyed and affects the tribological properties of graphene, and the processing method is complicated and difficult to realize industrial application. Volatilization causes environmental pollution and other problems

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  • Preparation method for spherical-graphene lubricant additive and use of spherical-graphene lubricant additive
  • Preparation method for spherical-graphene lubricant additive and use of spherical-graphene lubricant additive

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Embodiment 1

[0038] In this embodiment, the specific process and process parameters for the preparation of spherical graphene lubricating additives are:

[0039] (1) Graphene prepared by redox method was selected as raw material, and pulverized by a universal mechanical pulverizer with a rotating speed of 9000rpm and a processing time of 60min. The pulverized graphene was dispersed into water at a concentration of 2 mg / ml, and the graphene solution was ultrasonically dispersed and pulverized using a cell crushing ultrasonic machine with an operating power of 1000 W and a time of 120 min. The ultrasonic solution was subjected to centrifugation treatment, the centrifuge speed was 9000rpm, and the working time was 30min, and the graphene solution whose sheet size after separation was between 8 and 15 μm was selected.

[0040] (2) carry out surfactant modification water dispersion treatment to above-mentioned graphene solution system, choose polyvinylpyrrolidone (PVP) to join in the graphene s...

Embodiment 2

[0045] The difference from Example 1 is that in the present embodiment, the specific process and process parameters for the preparation of spherical graphene lubricating additives are:

[0046] (1) Graphene prepared by redox method was selected as raw material, and pulverized by a universal mechanical pulverizer with a rotating speed of 10000rpm and a processing time of 45min. The pulverized graphene was dispersed into water with a concentration of 4 mg / ml, and the graphene solution was ultrasonically dispersed and pulverized using a cell crushing ultrasonic machine with an operating power of 1200 W and a time of 150 min. The ultrasonic solution was subjected to centrifugation treatment, the centrifuge speed was 9000rpm, and the working time was 60min, and the graphene solution whose sheet size after separation was between 10 and 12 μm was selected.

[0047] (2) carry out surfactant modified water dispersion treatment to above-mentioned graphene solution system, choose PVP to ...

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Abstract

The invention relates to the field of application of graphene materials and particularly relates to a preparation method for a spherical-graphene lubricant additive and use of the spherical-graphene lubricant additive. According to the method, graphene or graphene oxide serves as a raw material, a graphene solution dispersion system with excellent dispersion stability is obtained through a mechanical pulverization or ultrasonic shearing and centrifugation process, spherical graphene is obtained through a spray drying method, and reduction-oxidation graphene spheres are obtained through carrying out reduction treatment on graphene spheres prepared from the graphene oxide. The spherical graphene can be directly dispersed in lubricant oil, lubricant grease or a polymeric matrix as a lubricantadditive, and a graphene modified lubrication product with high performance can be obtained through simple mechanical stirring or artificial oscillating. Thus, graphene lubricant oil / grease or a graphene modified polymeric composite material with good dispersion stability can be obtained through adding the spherical graphene; and by adding the spherical graphene, the tribological properties of the lubricant oil / grease or graphene modified polymeric composite material can be remarkably improved.

Description

technical field [0001] The invention relates to the application field of graphene materials, in particular to a preparation method and application of a spherical graphene lubricating additive. Background technique [0002] Graphene, as a new type of carbon material, has attracted extensive attention from the scientific and industrial circles since its appearance because of its unique planar two-dimensional structure and excellent physical and chemical properties. Graphene has extremely high mechanical strength (strength up to 1TPa), excellent interlayer shear slip performance, stable chemical properties and good environmental inertness. It is an ideal lubricating material. Adding graphene to lubricating oil / grease or polymer composites can significantly improve the wear resistance and friction reduction properties of the material. [0003] In recent years, based on the excellent tribological properties of graphene, new graphene-based lubricating materials have become a rese...

Claims

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Application Information

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IPC IPC(8): C10M125/02C08K9/00C08K9/04C08K7/18C08K3/04C10N30/06
CPCC08K3/04C08K7/18C08K9/00C08K9/08C10M125/02C10M2201/041C10N2030/06C10N2070/00
Inventor 曾尤王函薛伟海佟钰英哲张藤心成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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