Nano-molybdenum disulfide magnetic lubricant and preparation method thereof
A kind of alkene lubricant and nanotechnology, applied in the field of nanometer molybdenum disulfide magnetic lubricant, can solve the problems of increasing the use cost of lubricants, the lack of magnetic properties of nanoparticles, affecting the lubrication stability, etc., to improve product yield, prevent agglomeration, The effect of good dispersion
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Embodiment 1
[0020] 1 part of Fe with a particle size of 15nm 3 o 4 Add 1000 parts of an aqueous solution containing 0.002% graphene oxide, ultrasonically disperse at 50°C for 40 minutes; maintain a constant temperature and ultrasonic state, add 0.2 parts of EDTA-2Na, 2 parts of sodium sulfide, 20 parts of ammonium molybdate, and 0.2 parts of oxalic acid to the solution in sequence Sodium, adjust the pH of the solution to 7, move the solution to a pressure-resistant reactor, and keep it warm for 1 hour at a temperature of 165°C; then adjust the pH to 9, lower the temperature to 90°C, add 0.02 parts of sodium borohydride, and keep it warm 2h; After cooling, the solution was centrifuged to obtain a black solid, which was rinsed with deionized water and dried to obtain a lubricant precursor; the lubricant precursor was placed in a tube furnace, purged with high-purity nitrogen, and the air velocity was 0.05m / s, at the same time, the temperature of the system is raised to 400°C for 20 minute...
Embodiment 2
[0022] 1 part of Fe with a particle size of 20nm 3 o 4 Add 1000 parts of an aqueous solution containing 0.02% graphene oxide, ultrasonically disperse at 40°C for 30 minutes; maintain a constant temperature and ultrasonic state, add 0.2 parts of EDTA-2Na, 10 parts of sodium sulfide, 60 parts of ammonium molybdate, and 0.8 parts of oxalic acid to the solution in sequence Sodium, adjust the pH of the solution to 7, move the solution to a pressure-resistant reactor, and keep it warm for 1 hour at a temperature of 180°C; then adjust the pH to 9.5, lower the temperature to 90°C, add 0.1 parts of sodium borohydride, and keep it warm 2.5h; after cooling, the solution was centrifuged to obtain a black solid, which was rinsed with deionized water and dried to obtain a lubricant precursor; the lubricant precursor was placed in a tube furnace, purged with high-purity nitrogen, and the air velocity was 0.05 m / s, at the same time, raise the temperature of the system to 450°C for 10 minutes...
Embodiment 3
[0024] 1 part of Fe with a particle size of 30nm 3 o 4 Add 1000 parts of an aqueous solution containing 0.05% graphene oxide, ultrasonically disperse at 30°C for 30 minutes; maintain a constant temperature and ultrasonic state, add 0.3 parts of EDTA-2Na, 30 parts of sodium sulfide, 90 parts of ammonium molybdate, and 1 part of oxalic acid to the solution in sequence Sodium, adjust the pH of the solution to 7, move the solution to a pressure-resistant reactor, and keep it warm for 2 hours at a temperature of 180°C; then adjust the pH to 10, lower the temperature to 100°C, add 0.2 parts of sodium borohydride, and keep it warm 3h; After cooling, the solution was centrifuged to obtain a black solid, which was rinsed with deionized water and dried to obtain a lubricant precursor; the lubricant precursor was placed in a tube furnace, purged with high-purity nitrogen, and the air velocity was 1m / s, at the same time, raise the temperature of the system to 500 ° C for 20 min, then ra...
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