TWM647093U - A graphene component contained dry lubricant layer on metal surface - Google Patents

Abstract

This new model reveals that a layer of solid dry wear-resistant lubricating layer structure containing graphene new material is densely adhered to the metal surface. It is mainly used to improve the lubrication and wear-resistant performance of traditional metals in motion grinding; it can be effectively used on metal-containing surfaces. In the case of dynamic friction between metal, metal against rubber and plastic, it mainly uses graphene's many characteristics of high strength, high electrical conductivity, high thermal conductivity, high lubrication and low friction coefficient, which can greatly reduce the friction coefficient and Wear and tear, and can operate stably for a long time, extend the life of each moving component, and reduce energy consumption.

Description

Structure of solid lubricating layer on metal surface containing graphene

The new model discloses a new solid lubricating layer structure on a metal surface containing graphene, which provides a relative friction system between metal and metal, or a relative friction system between metal and rubber, plastic, etc., in various linear motions, or rotational motions, or spiral motions. The high lubrication properties of graphene are used to greatly reduce the friction coefficient and improve wear resistance; during operation, the force intensity can be greatly reduced, thereby extending the service life of mechanical components. Reduce energy consumption and provide more precise and stable operation. It also has extreme pressure load characteristics and is not afraid of heavy load pressure. For linear slide rail movement and bearing rotation with heavy loads, it can operate smoothly for a long time and reduce the maintenance frequency of adding lubricating grease. Due to the high thermal conductivity of graphene, it effectively helps the machine parts dissipate heat, and the high conductivity of graphene effectively eliminates static electricity, and because the solid lubricating layer is not easy to stick to dust, hair, and foreign matter, it makes the machine tools very clean. degree, significantly improving product yield.

The lubrication mechanism of metal parts in the currently known technology, in addition to trying to polish the metal friction surface layer and reduce the surface roughness, thereby reducing the friction coefficient, obtaining good lubrication, making the machine run smoothly, and reducing damage and energy consumption; the commonly used The method is to add lubricating grease based on mineral oil or saponified base, and add various physical functional agents such as anti-heat aging agents, antioxidants, viscosity index improvers, antifreeze agents, etc. The prepared lubricating oil, grease, lubricating paste, etc. form a lubricating oil film on the friction surface. This method has been used for many years.

As the lubrication performance requirements have been continuously improved, wet grease is often lost, resulting in insufficient lubrication, resulting in machine jamming, jamming, abnormal machine failure, and the inability to run smoothly. Therefore, the frequency of maintenance and the frequency of adding lubricating grease is very high, which is quite detrimental to production. Significantly increase production costs.

Therefore, it is necessary to further develop the automatic oil replenishing mechanism, or add lubricating media to the lubricating oil to increase the lubrication degree. Commonly used lubricating media include: graphite, boron nitride, polytetrafluoroethylene, molybdenum disulfide, tungsten disulfide, etc. ; Although each has its own characteristics, it is still in a wet state, and it is unavoidable to be contaminated with dust, hair, and foreign objects, and it must be repaired and replenished with lubricating grease regularly. Later, although dry lubricants or self-lubricating bearings were invented and used, they can still be used. The only lubricating media choices are graphite, boron nitride, polytetrafluoroethylene, molybdenum disulfide, tungsten disulfide... and other options.

It was not until the 21st century that the new material graphene was discovered. Because of its excellent high thermal conductivity, high electrical conductivity, and high rigidity, it has attracted much attention; but its lubrication and wear resistance properties have been relatively unnoticed. Oil and grease mixed with graphite, boron nitride, polytetrafluoroethylene, molybdenum disulfide, tungsten disulfide... and other lubricating media are still commonly used in the field of lubrication. This new model uses graphene as a lubricating medium to further improve the lubrication and friction reduction of metal components, extending their service life and maintenance cycle.

Graphene is a new material that was only discovered in the 21st century. In addition to its excellent electrical and thermal conductivity properties, its high rigidity and high strength are also familiar fields. Therefore, the world is trying its best to find these properties. Various uses have also made progress. Graphene itself is also a very excellent lubricating medium. This new type uses graphene to replace the traditional lubricating medium.

There are roughly two forms of lubricating media used. One is a wet state when used for lubrication, and the other is a dry solid state. This new system specifically discloses the structure and application of a solid wear-resistant lubricating layer on a metal surface containing graphene components. By using solid lubricants, we can reduce motion friction, save fuel, reduce energy costs, increase smooth operation, increase load capacity, ensure reliable and smooth operation, extend the service life of parts, reduce maintenance costs, and extend oil change intervals. Improve the cleanliness of the operating environment for wet lubricants.

When using wet lubrication, even after the solvent has completely evaporated, the base mineral oil is left in a non-solid state, and when used for a long time, it is easy to lose or even volatilize, gradually causing the frictional motion to lose lubrication, or even get stuck or damaged, so it is necessary to Lubricating oil or grease must be replenished from time to time to maintain considerable lubrication capacity, but dust, hair, foreign matter, etc. are easily adhered to, making the working environment extremely harsh, contaminating products, and reducing yield. In addition, friction can easily generate static electricity, and grease is not a good conductor and can easily accumulate to generate considerable static electricity, further damaging the product. At present, when used in dry lubrication, the lubricating medium, lubrication degree and functionality are still limited; however, graphite is added Ethylene lubricants have considerable electrical conductivity, so they can easily eliminate static electricity, and help dissipate heat due to their high thermal conductivity. Therefore, this new model eliminates the shortcomings of being easy to get dirty and sticky, and eliminates static electricity and high heat dissipation, so that in linear slide rail motion or rotational motion, it not only saves time and effort, but also ensures a clean environment and reduces the need for regular replenishment. The maintenance frequency of oil or automatic oil replenishment greatly reduces labor frequency and cost.

Before this, the lubricating medium was molybdenum disulfide alone, or combined with graphite in a lubricating formula, but both were micron-sized, unlike graphene, which was only nano-sized. Therefore, during the rubbing process, the ability and effect of repairing and grinding the metal wall are incomparable. This is also the reason why this new model One of the reasons for using nanoscale graphene as a lubricating medium.

(10): Metal substrate layer

(20): Containing graphene lubricating layer

[Picture 1] is a schematic diagram of the new type.

Generally based on the best feasible embodiment of the present invention and detailed description in conjunction with Figure 1 of the drawing, in order to increase understanding of the present invention, the present invention discloses a graphene-containing solid lubricating layer structure on a metal surface, which includes: a The metal substrate layer (10) is a surface layer made of general metal, which can be the surface layer of a workpiece, the surface layer of a part, or sheet metal, etc., and its specific structure or appearance is not specifically limited; and a layer containing graphene The lubricating layer (20) is mainly formed by adding 0.1 to 10% of the graphene component to the paint. The main components of the paint can be roughly divided into two types, namely thermosetting and thermoplastic paints; graphene and dispersion are added in detail. It is formulated with agents, flow aids, functional aids, and diluents, etc.;

1. Thermosetting coating: Contains thermosetting resin, including: any one of epoxy resin, polyurethane resin, acrylic resin, silicone resin, and phenolic resin, accounting for 30 to 80% by weight, and combined with 6 to 50% of hardener Weight fraction, graphene 1 to 10 weight fraction, dispersant 1 to 10 weight fraction, functional additive 1 to 10 weight fraction, organic solvent 10 to 55 weight fraction, mix evenly, dilute to 50 to 300 fluid viscosity, and adjust Determine the viscosity required for the construction spraying process in which it is more suitable. After stirring and dispersing evenly, use a spray gun or soaking or brushing construction process to apply the paint on the metal parts. Then put the metal parts into the oven at 80°C and bake for 1 hour. The thickness of the surface layer is 0.1 to 200 microns. This is a thermosetting two-component method.

2. Thermoplastic coating: Contains 30 to 80 weight percent of thermoplastic resin, 1 to 10 weight percent of graphene, 1 to 10 weight percent of dispersant, 1 to 10 weight percent of functional additives, and 10 to 55 weight percent of organic solvent, and mix them evenly. Finally, it is diluted with an organic solvent to a fluid viscosity of 50 to 300 to make it suitable for the spraying process. Then spray it on the metal parts and dry it in the oven. The thermoplastic resin system can be modified acrylic resin, modified polytetrafluoroethylene PTFE, modified vinylidene fluoride PVDF series fluoroplastics, or polyetherimide PEI, polyimide PI, thermoplastic polyurethane TPU.. . and other plastics; and the solvent mentioned above can be toluene, xylene, ethylbenzene, tetramethylbenzene, DMF, MEK, THF, butyl acetate, ethyl acetate... and other common organic solvents or mixtures . The dispersant is any one of organic silicon compounds, organic titanium compounds, organic zirconium compounds, and functionalized graphene compounds, and the remaining resins and additives are commonly used coating substances.

The above two finished products and unsprayed samples were subjected to the ASTM-D1894 grinding and sassafrasing test. The results were that when the coated metal parts and the uncoated NBR rubber sheets were rubbed against each other, the dynamic grinding and sassafrasing coefficients were: The uncoated metal was 0.80, 0.15 after coating metal; static friction coefficient: 2.98 for uncoated metal, 0.23 after coating metal, obviously the results of the present invention are quite effective; thereby enabling the metal substrate layer (10) to combine with the metal containing The graphene lubricating layer (20) utilizes the high lubrication properties of graphene to reduce the friction coefficient and provide relative friction between metal and metal, or relative friction between metal and rubber or plastic, so that the loss caused by motion is reduced, and Extended service life.

After treatment through this new type, the static friction coefficient can be reduced to more than 10 times, while the kinetic friction coefficient can be reduced by about 4 to 5 times. If the friction between coated stainless steel and uncoated stainless steel is compared with the friction between uncoated stainless steel and uncoated stainless steel, the friction coefficient will obviously decrease by 30 to 50% under a load of 10 kg. The magnitude of the decrease is related to the surface polishing roughness of the stainless steel when it was originally uncoated, and is also related to the weight load extreme pressure.

However, the metal surface is coated with a graphene lubricating layer, which greatly reduces the friction coefficient of the metal surface during linear motion friction or rotational friction, which will significantly reduce wear and energy consumption and extend the service life of the components.

(10): Metal substrate layer

(20): Containing graphene lubricating layer

Claims (8)

A graphene-containing metal surface solid lubricating layer structure, which includes: a metal substrate layer (10); a graphene-containing lubricating layer (20), which is formed by adding 0.1 to 10% of graphene components to the paint , which is mainly either thermosetting or thermoplastic resin, and also needs to be prepared with dispersants, flow aids, diluents, and various functional additives, so that the metal base material layer (10) can be combined The graphene-containing lubricating layer (20) utilizes the high lubrication properties of graphene to reduce the friction coefficient and provide relative friction between metal and metal, or relative friction between metal and rubber or plastic, so as to reduce the loss caused by motion. , and extend the service life. The graphene-containing metal surface solid lubricating layer structure as described in claim 1, the dispersant in the graphene-containing lubricating layer (20) is: organic silicon compound, organic titanium compound, organic zirconium compound, or functionalized Any kind of graphene compound. The graphene-containing metal surface solid lubricating layer structure as described in claim 1, the thermosetting resin in the graphene-containing lubricating layer (20) is: epoxy resin (EPOXY), polyetherimide resin (PEI) , any one of ACRYLATE, SILICONE and PHENOL. The graphene-containing metal surface solid lubricating layer structure as described in claim 1, the thermoplastic resin in the graphene-containing lubricating layer (20) is: modified acrylic resin, modified PTFE, modified PVDF series fluoroplastics , polyetherimide PEI, polyetherimide PI, polyurethane TPU, polyetheretherketone PEEK, polyether Any one of ketone PEK, polyphenylene sulfide PPS, polyphenylene ether PPO, and polyamide PA. As claimed in claim 1, the graphene-containing metal surface solid lubricating layer structure, the functionalized graphene in the dispersant of the graphene-containing lubricating layer (20) refers to the graphene-containing solid lubricating layer containing oxygen groups, hydroxyl groups, and aldehydes. A kind of graphene compound with functional groups such as group, carboxylic acid group, ketone group, amino group, ester group, sulfonic acid group, amide group, etc. As claimed in claim 1, the graphene-containing solid lubricating layer structure on the metal surface, the graphene-containing lubricating layer (20) can be mainly used in railway rails, linear slide rails, door and window slide rails, furniture drawers, piston rods, etc. Linear motion to reduce friction coefficient, reduce friction loss, reduce energy consumption and increase service life. As for the graphene-containing metal surface solid lubricating layer structure described in claim 1, the graphene-containing lubricating layer (20) can be mainly used in various rotational movements, such as bearings, balls, wheels, pulleys, etc., whereby Reduce friction coefficient, reduce friction loss, reduce energy consumption and increase service life. As for the graphene-containing solid lubricating layer structure on the metal surface described in claim 1, the graphene-containing lubricating layer (20) can be mainly used in spiral motion friction, such as screw locks, spiral drilling tools, screw rods, etc. , in order to reduce the friction coefficient, prevent jamming, reduce friction loss, reduce energy consumption and increase service life.

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