Preparation method of ultra-stable silicone oil-based magnetorheological fluid
A technology of magnetorheological fluid and silicone oil, which is applied in the field of preparation of silicone oil-based magnetorheological fluid, can solve the problems of cumbersome preparation process and achieve the effect of avoiding cumbersome steps and satisfying complex reaction conditions
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[0032] The invention provides a method for preparing an ultra-stable silicone oil-based magnetorheological fluid, comprising:
[0033] Add magnetically sensitive particles and additives into the carrier liquid, stir and mix, and then carry out compound reaction to obtain oil-based magnetorheological fluid in one step;
[0034] Among them, the proportions of magnetic sensitive particles, carrier liquid and additives are respectively as follows:
[0035] Magnetic sensitive particles: 30-35 parts; carrier liquid: 50-70 parts; additives: 1-10 parts;
[0036] Wherein, the magnetic sensitive particle is Fe 3 0 4 Powder or alloy particle powder of Fe, Co and Ni, the average particle diameter of the magnetic sensitive particles is 1-10 microns;
[0037] The additives include antifriction and antiwear agents, antioxidants, thixotropic agents, antifreeze agents and surfactants;
[0038] The carrier liquid is silicone oil;
[0039] Wherein, the temperature for composite reaction aft...
Embodiment 1
[0051] With 3.0g (0.5%) molybdenum disulfide (friction-reducing anti-wear agent), 3.0g (0.5%) organophosphorus compound (oxidant inhibitor), 6g (1%) organic bentonite (thixotropic agent), 27g ( 4.5%) ethylene glycol, 3.0g (0.5%) alkoxy thiophosphate (surfactant) were added to 81g (13.5%) low-viscosity silicone oil (PA0170), stirred, 504g Fe 3 0 4 The powder was added to the silicone oil, stirred at a high speed of 1000rpm to obtain a suspension, and the above suspension was compounded and reacted at a temperature of 70°C for 2 hours to prepare an oil-based magnetorheological fluid.
[0052] Put the magnetorheological fluid prepared in this example into a 10ml measuring cylinder, let it settle at room temperature, and observe its sedimentation rate after 3 months. Among them, the sedimentation rate is determined according to the following method: after standing for 3 months of sedimentation, take the ratio of the volume of the supernatant to the total volume of the sample, multi...
Embodiment 2
[0055] 4.2g (0.7%) antifriction and antiwear agent molybdenum disulfide and graphite (1:1), 6g (1%) thixotropic agent organic bentonite, 15g (2.5%) ethylene glycol, 4.8g (0.8%) surface Activator alkoxythiophosphate was added to 45g (7.5%) low-viscosity silicone oil (PA0168) and stirred, 537g of Fe, Co and Ni alloy particle powder was added to the silicone oil, stirred at a high speed of 1000rpm to obtain a suspension, and The above suspension was compounded and reacted at a temperature of 70°C for 2 hours to prepare an oil-based magnetorheological fluid.
[0056] Put the magnetorheological fluid prepared in this example into a 10ml measuring cylinder, let it settle at room temperature, and observe its sedimentation rate after 3 months. Among them, the sedimentation rate is determined according to the following method: after standing for 3 months of sedimentation, take the ratio of the volume of the supernatant to the total volume of the sample, multiply it by 100%, and obtain ...
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