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Spherical aluminum powder/polyaniline core-shell structure composite electrorheological fluid

A technology of spherical aluminum powder and polyaniline core, which is applied in the direction of lubricating compositions, petroleum industry, additives, etc., can solve the problems of low mechanical properties, difficult to achieve practical application of mechanical values, large equipment wear, etc., and achieve high yield stress value, The effect of good anti-sedimentation properties

Inactive Publication Date: 2015-08-19
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent publication number is that the European patent of EP0396237 utilizes aluminosilicate as the dispersed phase particle of electrorheological fluid, and its composition is (Al 2 o 3 ) b (SiO 2 ) c , b:c is in the range of 1.1 to 1.9, but there are disadvantages such as low mechanical properties, poor anti-settling stability, and large wear and tear on equipment; later, organic polymer materials are often used as the dispersed phase of electrorheology (such as H.Block and J.P.Kelly, U.K.Patent, 2170510 (1985)), but its preparation process is complicated, the cost is high, and some are highly toxic, it is difficult to realize industrialization and its mechanical value is difficult to achieve practical application

Method used

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  • Spherical aluminum powder/polyaniline core-shell structure composite electrorheological fluid
  • Spherical aluminum powder/polyaniline core-shell structure composite electrorheological fluid
  • Spherical aluminum powder/polyaniline core-shell structure composite electrorheological fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 4g of polyvinylpyrrolidone, 2g of spherical aluminum powder with a particle size of 1-3μm, and 80mL of distilled water into a three-necked flask, stir for 0.5 hours to disperse the spherical aluminum powder, and then add 1g of ammonium persulfate and 0.4g of sodium dodecyl sulfate , stirred for 1 hour, added 10 g of aniline, 100 mL of 1 mol / L hydrochloric acid aqueous solution, stirred and reacted at room temperature for 24 hours, washed, suction filtered, and dried in vacuum at 70°C for 24 hours, and then the reaction product was washed with an ammonia solution with a mass fraction of 25% to 28%. Soak for 24 hours, wash, filter, vacuum dry at 70°C for 24 hours, and grind into fine and uniform particles with an agate mortar to obtain spherical aluminum powder / polyaniline core-shell structure composite particles. Depend on figure 1 , 2 It can be seen that the spherical aluminum powder / polyaniline core-shell structure composite particle has no obvious change in the p...

Embodiment 2

[0032] In Example 1, the reaction product was soaked in an ammonia solution with a mass fraction of 25% to 28% for 6 hours, and the other steps were the same as in Example 1 to prepare an electrorheological fluid.

Embodiment 3

[0034] In Example 1, the reaction product was soaked in an ammonia solution with a mass fraction of 25% to 28% for 12 hours, and other steps were the same as in Example 1 to prepare an electrorheological fluid.

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Abstract

The invention discloses spherical aluminum powder / polyaniline nuclear-shell structure composite electrorheological fluid. A dispersion phase is a spherical aluminum powder / polyaniline nuclear-shell structure composite particle, the diameter of a spherical aluminum nuclear is 1-3 micrometers, the thickness of a polyaniline shell layer is 80-170nm, and a continuous phase is simethicone. An in-situ emulsion polymerization method is adopted in the fluid to prepare the nuclear-shell structure composite particle with the aluminum powder as the nuclear and the polyaniline as the shell, the preparation method is simple, the raw materials are low in price and easy to obtain, the nuclear-shell structure composite particle is soaked by ammonium hydroxide and then used as the dispersion phase, and then the electrorheological fluid is obtained. The electrorheological fluid has the higher yield value of stress and good settlement resistance performance.

Description

technical field [0001] The invention belongs to the technical field of electrorheological materials, and in particular relates to an electrorheological fluid in which a core-shell structure composite material obtained by modifying the surface of aluminum powder with polyaniline is a dispersed phase. Background technique [0002] Electrorheological fluid is a new type of intelligent material, which has huge application scenarios in the fields of shock absorption, mechanical transmission, automatic control, and mechatronics. In the national defense industry, because metal aluminum powder can increase combustion heat and combustion density, and inhibit unstable combustion, many energetic materials, especially high-energy solid rocket propellants, usually need to add a large amount of aluminum powder to improve propulsion. Combustion properties of the propellant and the propulsion to the rocket, coupled with abundant raw materials and low cost, are widely used in solid propellan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M161/00C10M169/04
Inventor 张国防龚举浩李子美张伟强高子伟崔丹朱序阳南宝江
Owner SHAANXI NORMAL UNIV