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Preparation method of modified graphene-teflon composite solid lubricating coating

A technology of polytetrafluoroethylene and solid lubricating coating, which is applied in the field of preparation of high wear-resistant modified graphene polytetrafluoroethylene composite solid lubricating coating, can solve the problem of inability to effectively exert the strengthening and toughening effect of nanomaterials, easy It becomes the source of cracks, reduces the mechanical properties and wear resistance of materials, etc., and achieves the effect of being suitable for large-scale production, easy to popularize and apply, and less production equipment.

Inactive Publication Date: 2016-09-28
FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its preparation method is to simply mix these ingredients. Because graphene has extremely high surface energy, it is very easy to agglomerate. If it exists in the composite material in the form of agglomerates, it will become a structural defect similar to pores intrinsically. Not only can it not effectively exert the strengthening and toughening effect of nanomaterials, but it is also very easy to become the source of cracks, so it often reduces the mechanical properties and wear resistance of materials

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  • Preparation method of modified graphene-teflon composite solid lubricating coating

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Embodiment 1

[0018] A preparation method of modified graphene polytetrafluoroethylene composite solid lubricating coating, comprising the steps of:

[0019] 1) Surface functionalization of graphene

[0020] According to the ratio of the mass (g) of graphene to the mass (g) of the functionalized solvent as 1:100, add graphene to the functionalized solvent, mix and stir at room temperature for 1 minute, and then put it into a microwave oven Irradiate for 20 minutes, and obtain surface functionalized graphene after filtration;

[0021] Wherein, the functionalized solvent includes ammonia water and p-aminobenzenesulfonic acid mixed at a volume ratio of 1:2.5; the graphene is prepared by a chemical method, with a thickness of less than 20nm and a specific surface area greater than 100m 2 / g.

[0022] 2) Preparation of polytetrafluoroethylene emulsion:

[0023] Mix polytetrafluoroethylene, surface-functionalized graphene, and deionized water in a ratio of 6:1:5 by mass to form a polytetrafluo...

Embodiment 2

[0027] A preparation method of modified graphene polytetrafluoroethylene composite solid lubricating coating, comprising the steps of:

[0028] 1) Surface functionalization of graphene

[0029] According to the ratio of the mass (g) of graphene to the mass (g) of the functionalized solvent as 1:10, add graphene to the functionalized solvent, mix and stir at room temperature for 5 minutes, and then put it into a microwave oven Irradiate for 1 minute, and obtain surface functionalized graphene after filtration;

[0030] Wherein, the functionalized solvent is sulfamic acid; the graphene is prepared by CVD method, the thickness is less than 20nm, and the specific surface area is greater than 100m 2 / g.

[0031] 2) Preparation of polytetrafluoroethylene emulsion:

[0032] Mix polytetrafluoroethylene, surface-functionalized graphene, and deionized water in a ratio of 50:0.1:40 by mass to form a polytetrafluoroethylene emulsion; the polytetrafluoroethylene is a powder with a relat...

Embodiment 3

[0036] A preparation method of modified graphene polytetrafluoroethylene composite solid lubricating coating, comprising the steps of:

[0037] 1) Surface functionalization of graphene

[0038] According to the ratio of the mass (g) of graphene to the mass (g) of functionalized solvent is the ratio of 1:50, graphene is added in the functionalized solvent, mixed and stirred at room temperature for 1-5 minutes, then put into Irradiated in a microwave oven for 10 minutes, and obtained surface functionalized graphene after filtration;

[0039] Wherein, the functionalized solvent includes aminopyrine and aminobutyric acid mixed at a volume ratio of 1:3.2; the graphene is prepared by a chemical method, with a thickness of less than 20nm and a specific surface area greater than 100m 2 / g.

[0040] 2) Preparation of polytetrafluoroethylene emulsion:

[0041] Mix polytetrafluoroethylene, surface-functionalized graphene, and deionized water in a ratio of 58:5:45 by mass to form a pol...

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Abstract

The invention discloses a preparation method of a modified graphene polytetrafluoroethylene composite solid lubricating coating, which comprises the following steps: 1) surface functionalization of graphene: adding graphene into a functional solvent and mixing at room temperature Stir, then put it into a microwave oven for radiation, and obtain surface functionalized graphene after filtration; 2) preparation of polytetrafluoroethylene emulsion: mix polytetrafluoroethylene, surface functionalized graphene and deionized water to form polytetrafluoroethylene Tetrafluoroethylene emulsion; 3) preparation of graphene polytetrafluoroethylene solid lubricating coating: the polytetrafluoroethylene emulsion is evenly coated on the surface of the metal product, and then the metal product coated with the polytetrafluoroethylene emulsion is placed The film-like coating is formed by sintering at a high temperature in an environment of 350-400°C, and the modified graphene polytetrafluoroethylene composite solid lubricating coating is obtained after the film-like coating is cooled. This method uses microwave chemistry to functionalize the surface of conventional graphene materials, and the surface-modified graphene polytetrafluoroethylene composite solid lubricating coating has good self-lubricating properties, low friction coefficient, thermal stability and good adhesion. attachment.

Description

technical field [0001] The invention relates to the technology in the field of polymer materials, and in particular provides a method for preparing a highly wear-resistant modified graphene polytetrafluoroethylene composite solid lubricating coating. Background technique [0002] Solid lubricating coating is a special lubricating material. Materials such as molybdenum disulfide, graphite, and polytetrafluoroethylene all have good frictional mechanical properties and are commonly used solid lubricating materials. It has become a new technology that cannot be replaced by traditional hydrodynamic lubrication. Polytetrafluoroethylene (PTFE) has excellent self-lubricating properties, heat resistance, chemical corrosion resistance and dielectric properties, and is widely used in chemical, mechanical, aviation and other fields. However, PTFE has low hardness and poor wear resistance, which greatly limits the application of single-phase PTFE materials as solid lubricants. Compound...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/12
CPCC09D127/18C08K3/04C08K9/04C09D7/62
Inventor 李梅宋宏芳赵东辉戴涛周鹏伟
Owner FUJIAN XFH NEW ENERGY MATERIALS CO LTD
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