CN105505524A - Solid lubrication composite material and manufacturing method - Google Patents
Solid lubrication composite material and manufacturing method Download PDFInfo
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- CN105505524A CN105505524A CN201410586464.5A CN201410586464A CN105505524A CN 105505524 A CN105505524 A CN 105505524A CN 201410586464 A CN201410586464 A CN 201410586464A CN 105505524 A CN105505524 A CN 105505524A
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- boron oxide
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- carbon nanotube
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- tetrafluoroethylene
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Abstract
The invention relates to a solid lubrication composite material and a manufacturing method. The manufacturing method comprises grinding a carbon nanotube in a bowl mill to enable the carbon nanotube to form a segment-shaped structure, adding ethanol and a surfactant into the carbon nanometer substance with the segment-shaped structure, and performing ultrasonic processing, so as to obtain a carbon nanometer liquid; weighing a boron oxide powder according to the weight ratio, getting teflon powder and the carbon nanometer liquid, mixing the three substances through high-speed stirring, and dispersing the carbon nanometer liquid in the powder of boron oxide, so as to prepare a mixture; and performing compression molding on the mixture, and demolding, so as to obtain the finished product solid lubrication composite material. The solid lubrication composite material is low in friction coefficient, is substantially improved in self lubricity, wear resistance and other technical indexes, is capable of conducting heat and electricity, and is capable of reducing and eliminating static electricity caused by friction.
Description
Technical field
The present invention relates to a kind of solid lubricating composite material, particularly relate to metallurgical mine, sports, a kind of solid lubricating composite material and making method containing carbon nanometer tube material that the fields such as mechanical means use.
Background technology
Widely used solid lubricant in current engineering, as graphite, Er Liuization Molybdenum, tetrafluoroethylene, solid lubrication frictional coefficient is high, and lubricity is undesirable.
Carbon nanotube can be regarded as by single or multiple lift graphite flake around central shaft by the curling seamless nano level pipe of certain helix angle, there is the tubular structure of seamless hollow, its body is surrounded by hexagonal carbon atom grid, and two ends then can regard as two hemispheric large fullerene molecules usually.The diameter of Single Walled Carbon Nanotube is comparatively thin, is generally a few nanometer to tens nanometers.Up to the present, the thinnest diameter of single-wall carbon nano tube found is only 0.4 nanometer, and multi-walled carbon nano-tubes is owing to having multi-layer wall, and its diameter is relatively large, is generally tens nanometers.The length of carbon nanotube is longer, different with the difference of various preparation method, generally can reach tens to micron up to a hundred, and at present, the report met, its length of the longest carbon nanotube can reach several millimeter, and Japan Report has people to prepare 2.5 cm long.But the most of length of carbon nanotube produced still is in micron dimension.
The smooth property people of carbon nanotube understand seldom, just there is people with the research mode of Nanotribology, molecular dynamics simulation be Main Means inquired into carbon nanotube at the diamond based end, hydrogen substrate and the frictional behaviour of sliding on the diamond based end of hydrogen of having tiled, main research and the conclusion obtained think that carbon nanotube has occurred superslide phenomenon when diamond basesliding.Its major cause produced is when carbon nanotube slides on the diamond based end, because the lattice direction of upper surface (carbon nanotube) is contact non-matching with the lattice direction of lower surface (diamond), because under microstate, relative position that the lattice between upper and lower surface causes along with slippage change generation is quivered phenomenon.But this is the simulation discussion under microstate.
Kentucky university of the recent U.S. is found by research, finds that nanotube surface frictional coefficient is extremely low when liquid flows through the barrier film containing artificial carbon's nanotube.With regard to solid lubricant widely used in common engineering, if graphite, Er Liuization Molybdenum, polytetrafluoroethylene solids lubrication friction coefficient all do not reach.
At present, containing carbon nanotube, the solid lubricating composite material of boron oxide yet there are no report.
Summary of the invention
Object one of the present invention is to provide a kind of solid lubricating composite material being feed composition with carbon nanotube, boron oxide, tetrafluoroethylene, and two making methods being to provide a kind of solid lubricating composite material, fill up the blank of prior art.
Realize foregoing invention object by the following technical solutions:
A kind of solid lubricating composite material, the raw material of described lubricating composite contains carbon nanotube, boron oxide, polytetrafluoroethylmaterial material, the weight percent content of each component is: carbon nanotube 1% ~ 5%, boron oxide 1% ~ 3%, tetrafluoroethylene 93% ~ 96%.
A making method for solid lubricating composite material, its making step is:
A, by carbon nanotube grinding in ball grinder 30 ~ 60 minutes, the section of becoming shape structure, add in the carbon nano-substance of section shape structure percent by volume be 90% ethanol and percent by volume be 0.1% ~ 0.15% surface dispersant alkylphenol polyoxyethylene, use ultrasonication 60min, obtained carbon liquid nano.
B, boron oxide powder is crossed 300 ~ 350 mesh sieves, 200 mesh sieves crossed by tetrafluoroethylene, and minus sieve is for subsequent use.
C, get 1% ~ 3% boron oxide powder according to weight percent, 93% ~ 96% polytetrafluoroethylene powder, carbon liquid nano 1% ~ 5%, by three kinds of materials mixing high-speed stirring 10min, carbon liquid nano is scattered in the polytetrafluoroethylpowder powder of boron oxide, obtained mixture.
D, by mixture compression molding, pressure 280 ~ 300 MPa, pressurize 10min, obtained work in-process.
E, by work in-process heating ramp rate 18 ~ 20min, 360 ~ 380 DEG C of constant temperature 120min, air cooling cools to room temperature, and the demoulding obtains finished solid lubricating composite.
Due to the theoretical static friction coefficient of carbon nanotube low (being 0.001), have the performance of supersolid lubrication, it is combined with the tetrafluoroethylene with self lubricity and prepares solid lubricating composite material by the present invention.With existing Technical comparing, boron oxide has good lubrication, its frictional coefficient is lower than 0.1, the lubrication of boron oxide mainly comes from its layered crystal structure, and boron oxide is a kind of material of glassy structure, the boric acid of lubrication can be generated with the spontaneous generation chemical reaction of water molecules in damp atmosphere, boric oxide surface constantly generate self-lubricating layer, makes boric oxide surface have good self-lubricating property.It is combined with the tetrafluoroethylene and carbon nanotube with self lubricity, the effective lubricity improving novel material.Especially be used in damp atmosphere, its frictional coefficient reduces obviously.Show that the frictional coefficient of matrix material and wear resistance are all better than tetrafluoroethylene through experiment test.This matrix material outstanding advantages is: have low friction, high abrasion coefficient, thermal conductivity, electroconductibility, the over-all properties that self-lubricating etc. are excellent, and if its frictional behaviour is lower than tetrafluoroethylene, wear resisting property is higher than tetrafluoroethylene.
The present invention can be widely used in, metallurgical mine, sports, the various industry such as mechanical means.Making method of the present invention has given matrix material with the characteristic of carbon nanotube excellence, the matrix material based on tetrafluoroethylene, boron oxide is made to have low-friction coefficient, self lubricity, the technical indicators such as wear resistance increase substantially, and can heat-conductivity conducting, reduce and eliminate because of fricative electrostatic.Present invention process is simple, can at lower cost, and continuous batch is produced, and is suitable for suitability for industrialized production.
Below in conjunction with embodiment, the invention will be further described.
Embodiment
Embodiment 1:
With the carbon nanotube using the preparation of iron-containing catalyst catalytic chemical vapor deposition technique batch in Tsing-Hua University's nano agglomerate bed, it is ground 1 hour with high-energy ball milling, obtain carbon nanotube section shape material, in carbon nanotube section shape material, add percent by volume be 90% ethanol, add the surface dispersant alkylphenol polyoxyethylene (OP) that percent by volume is 0.1%, then use ultrasonication 60min, obtain carbon liquid nano.
According to weight percent, add the boron oxide 3% of 300 meshes in the carbon liquid nano of 4%, granularity is the tetrafluoroethylene 93% of 200 meshes, and three is mixed high-speed stirring 10min, the carbon liquid nano of thickness is distributed in the matrix of boron oxide, tetrafluoroethylene, obtains mixture.
Mixture is entered mould compression moulding, pressure 300 MPa pressurize 10min.Heating ramp rate 18min, 380 DEG C of constant temperature 120min, the outer air cooling of stove cools to room temperature.The demoulding obtains finished solid lubricating composite.
Embodiment 2:
With the carbon nanotube using the preparation of iron-containing catalyst catalytic chemical vapor deposition technique batch in Tsing-Hua University's nano agglomerate bed, it is ground 1 hour with high-energy ball milling, obtain carbon nanotube section shape material, add in carbon nanotube section shape material percent by volume be 90% ethanol, add the surface dispersant alkylphenol polyoxyethylene (OP) that percent by volume is 0.15%, then use ultrasonication 60min, obtain carbon liquid nano.
According to weight percent, add the boron oxide 1% of 300 meshes in the carbon liquid nano of 5%, granularity is the tetrafluoroethylene 94% of 200 meshes, and three is mixed high-speed stirring 10min, the carbon liquid nano of thickness is distributed in the matrix of boron oxide, tetrafluoroethylene, obtains mixture.
Mixture is entered mould compression moulding, pressure 300 MPa pressurize 10min.Heating ramp rate 18min, 380 DEG C of constant temperature 120min, the outer air cooling of stove cools to room temperature, and the demoulding obtains finished solid lubricating composite.
Embodiment 3:
With the carbon nanotube using the preparation of iron-containing catalyst catalytic chemical vapor deposition technique batch in Tsing-Hua University's nano agglomerate bed, it is ground 1 hour with high-energy ball milling, obtain carbon nanotube section shape material, add in carbon nanotube section shape material percent by volume be 90% ethanol, add the surface dispersant alkylphenol polyoxyethylene (OP) that percent by volume is 0.15%, then use ultrasonication 60min, obtain carbon liquid nano.
According to weight percent, add the boron oxide 2% of 300 meshes in the carbon liquid nano of 2%, granularity is the tetrafluoroethylene 96% of 200 meshes, and three is mixed high-speed stirring 10min, the carbon liquid nano of thickness is distributed in the matrix of boron oxide, tetrafluoroethylene, obtains mixture.
Mixture is entered mould compression moulding, pressure 300 MPa pressurize 10min.Heating ramp rate 18min, 380 DEG C of constant temperature 120min, the outer air cooling of stove cools to room temperature.The demoulding obtains finished solid lubricating composite.
The composite properties frictional behaviour that the present invention obtains is lower than tetrafluoroethylene, and wear resisting property is higher than tetrafluoroethylene.
Claims (1)
1. the making method of a solid lubricating composite material, the raw material of described lubricating composite contains carbon nanotube, polytetrafluoroethylmaterial material, boron oxide, described carbon nanotube is segment shape structure, boron oxide, tetrafluoroethylene are granular structure respectively, it is characterized in that, its making method adopts following processing step:
A, by carbon nanotube grinding in ball grinder 30 ~ 60 minutes, the section of becoming shape structure, add in the carbon nano-substance of section shape structure percent by volume be 90% ethanol and percent by volume be 0.1% ~ 0.15% surface dispersant alkylphenol polyoxyethylene ultrasonication 60min, obtained carbon liquid nano;
B, boron oxide powder is crossed 300 ~ 350 mesh sieves, 200 mesh sieves crossed by tetrafluoroethylene, and minus sieve is for subsequent use;
C, get 1% ~ 3% boron oxide powder according to weight percent, 93% ~ 96% polytetrafluoroethylene powder, carbon liquid nano 1% ~ 5%, by three kinds of materials mixing high-speed stirring 10min, carbon liquid nano is scattered in boron oxide and polytetrafluoroethylpowder powder, obtained mixture;
D, by mixture compression molding, pressure 280 ~ 300 MPa, pressurize 10min, obtained work in-process;
E, by work in-process heat temperature raising, heating ramp rate: 18 ~ 20 DEG C/min, constant temperature 120min after being warming up to 360 ~ 380 DEG C, the outer air cooling of stove cools to room temperature, cools to the demoulding after room temperature, obtained finished solid lubricating composite.
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| CN201410586464.5A CN105505524A (en) | 2014-10-18 | 2014-10-18 | Solid lubrication composite material and manufacturing method |
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| CN201410586464.5A CN105505524A (en) | 2014-10-18 | 2014-10-18 | Solid lubrication composite material and manufacturing method |
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Application publication date: 20160420 |
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