Preparation And Industrial Production Of Molybdenum Nanomaterials And Study On Dispersion Stability Of Molybdenum Trioxide In Lubricating Oil

Nanomaterials are the latest and hottest research materials in modern times.Many countries and are carrying out the research and application of nanomaterials.Among them,the wear resistance of nanomaterials is an important topic in modern scientific research.The application of nanomaterials to lubricating oil and the study of its antiwear performance is one of the hot directions of scientific research in recent years.Molybdenum nanomaterials are an important branch in the field of nanomaterials,but the preparation and industrial production technology of a variety of molybdenum nanomaterials are not mature enough.In this paper,several molybdenum nanomaterials were selected as the research objects.by exploring the conditions of their industrial production,the preparation and industrial production of several molybdenum nanomaterials were realized.The application of nano-molybdenum trioxide in lubricating oil was further explored.The main research contents and conclusions of this paper are as follows:1.Nanometer molybdenum trioxide was prepared by sublimation method.the particle size and morphology of the product were analyzed by scanning electron microscope(SEM),and the results showed that the particle size of the product was nanometer and spherical.The dispersion stability of nano-molybdenum trioxide in 100 N base lubricating oil was also investigated.When triethanolamine oleic acid soap and span80 are used as dispersants,nanometer molybdenum trioxide can be stably dispersed into lubricating oil,and the mass ratio of triethanolamine oleic acid soap to span80 is 5 : 7,which is detected by transmission electron microscope(TEM).It was verified that nano-molybdenum trioxide could be uniformly dispersed into lubricating oil,and then the absorbance of oil sample was measured by UV spectrophotometer.the optimum addition ratio of dispersant in dispersion was 10%.Furthermore,the anti-wear performance of the experimental oil sample was tested by four-ball friction testing machine,it was concluded that the anti-wear performance of lubricating oil was improved the most when the addition ratio of molybdenum trioxide was 0.3%.2.Nanometer molybdenum dioxide and nanometer molybdenum powder were prepared by hydrogen high temperature reduction method in tubular reduction furnace.the optimum production conditions for their industrial production were explored through many production experiments,and the trial production experiments were carried out.The experimental results show that the optimum temperature in each temperature region for the production of nanometer molybdenum dioxide is 350 ? in the first region,and the optimum temperature for the production of nanometer molybdenum dioxide is 350 ? in the first region.,360 ? in zone 2,365 ? in zone 3,375 ? in zone 4 and 370 ? in zone 5,when the pushing speed of the feeding boat is 30 min/2,the daily yield can reach 120kg/ days;The optimum temperature of each temperature zone in the reduction furnace is 725 ? in zone 1,785 ? in zone 2,815 ? in zone 3,820 ? in zone 4 and 820 ? in zone 5,respectively.When the pushing speed of the feeding boat is 35 min/2,the daily output can reach 70kg/ days.The XRD technique proves that the products are molybdenum dioxide and molybdenum powder.Scanning electron microscopy(SEM),X-ray energy dispersive spectroscopy(EDS)and glow discharge mass spectrometry(GDMS)were used to analyze the particle size and purity of the prepared materials.The results showed that the grade of the prepared materials was high purity nanoscale.3.The nanometer potassium molybdate solution was prepared by ultrasonic stirring method,and then the nanometer zinc molybdate powder was prepared by high temperature calcination method.The optimum conditions for the industrial production of the two molybdate were explored and the trial production experiments were carried out.When the reaction temperature is 80 ? and the reaction time is 2 h,the daily yield of nano-potassium molybdate can reach 500kg/ days,and when the reaction temperature is 350 ? and the reaction time is 2 h,the daily yield of nano-zinc molybdate can reach 1000kg/ days.XRD technique was used to prove the product.The product was characterized by SEM,and the size of the product produced by us was nanometer,and the research of potassium molybdate in foliar fertilizer was investigated.one white radish field was fertilized with potassium molybdate,and the other field was not fertilized.After the white radish matured,the two plots of white radish were weighed and compared.it was concluded that potassium molybdate had the effect of increasing yield of white radish by 28% when potassium molybdate was used as foliar fertilizer.