Preparing method of perfluoroalkylpolyether oil-based magnetofluid

A technology of perfluoropolyether oil and magnetic fluid, which is applied in the direction of magnetic liquid, organic material/organic magnetic material, etc., can solve the problems that the dispersion effect of magnetic fluid cannot be optimal, and the particles and carrier liquid cannot be dissolved together. Achieve the effect of improving the dispersion effect and not easy to age

Inactive Publication Date: 2013-10-02
江苏海纳精密装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Patents U.S. Pat. No. 5,718,833 and U.S. Pat. No. 5,738,802 added a second auxiliary dispersing surfactant to improve the dispersion effect, but these two patents It’s just that the method simply uses unmodified magn

Method used

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  • Preparing method of perfluoroalkylpolyether oil-based magnetofluid
  • Preparing method of perfluoroalkylpolyether oil-based magnetofluid

Examples

Experimental program
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Example Embodiment

[0025] Example 1

[0026] FeCl 2 and ferric salt FeCl 3 According to the molar ratio of 1:2, add the alcohol emulsion prepared by 12g of the first surfactant (where R=OOH) at the reaction temperature of 80°C, then add the precipitant ammonia water 100ML, react for 1h, add hydrochloric acid to adjust the pH To 4, after alternate cleaning with distilled water and alcohol, remove the upper liquid under the action of a magnetic field, add 50mL transition solution C 5 h 2 f 10 , the magnetic particles are dissolved in the transition liquid, and then remove excess water and other impurities under the action of a magnetic field, take a small amount of liquid to measure the content of the magnetic particles, and finally add 20g of perfluoropolyether oil and the second surfactant R=OH, Perfluoropolyether oil-based magnetic fluid was obtained after heating and dispersing at 150°C.

Example Embodiment

[0027] Example 2

[0028] FeCl 2 and ferric salt FeCl 3 According to the molar ratio of 1:2, add the alcohol emulsion prepared by 12g of the first surfactant (where R=OOH) at the reaction temperature of 80°C, then add the precipitant ammonia water 100ML, react for 1h, add hydrochloric acid to adjust the pH To 4, after alternate cleaning with distilled water and alcohol, remove the upper liquid under the action of a magnetic field, add 50mL transition solution C 4 f 9 OC 2 h 5 , the magnetic particles are dissolved in the transition liquid, and then excess water and other impurities are removed under the action of a magnetic field, a small amount of liquid is taken to measure the content of the magnetic particles, and finally 20g of perfluoropolyether oil and the second surfactant R=NH are added 2 , Perfluoropolyether oil-based magnetic fluid was obtained after heating and dispersing at 150°C.

Example Embodiment

[0029] Example 3

[0030] FeCl 2 and ferric salt FeCl 3 According to the molar ratio of 1:2, add the alcohol emulsion prepared by 12g of the first surfactant (where R=OOH) at the reaction temperature of 80°C, then add the precipitant ammonia water 100ML, react for 1h, add hydrochloric acid to adjust the pH To 4, after alternate cleaning with distilled water and alcohol, remove the upper liquid under the action of a magnetic field, and add an appropriate transition solution C 6 f 14 , the magnetic particles are dissolved in the transition liquid, and then remove excess water and other impurities under the action of a magnetic field, take a small amount of liquid to measure the content of the magnetic particles, and finally add 20g of perfluoropolyether oil and the second surfactant R=CH 2 OH, perfluoropolyether oil-based magnetic fluid was prepared after heating and dispersing at 150°C.

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Abstract

The invention discloses a preparing method of perfluoroalkylpolyether oil-based magnetofluid and belongs to the technical field of materials and material preparation. According to the preparing method of the perfluoroalkylpolyether oil-based magnetofluid, nanometer ferroferric oxide magnetic particles are synthesized with the method of precipitation, modification is carried out with fluorine ether surface-active agents during the synthesis, cleaning is carried out with water and ethyl alcohol alternately, the magnetic particles obtained can be dispersed in transition liquid, the surface-active agents used for assisting the dispersion, carrier liquid and the magnetic particles are dissolved mutually by means of the transition liquid, the transition liquid is eliminated in the heating process, and then the perfluoroalkylpolyether oil-based magnetofluid with a good dispersing effect is obtained. The perfluoroalkylpolyether oil-based magnetofluid manufactured with the method is suitable for vacuum dynamic packing, capable of meeting the demanding requirements for a super-quiet and high-temperature environment, good in waterproof property, good in oil-proof property, and good in acid and alkali resistance.

Description

technical field [0001] The present invention relates to a magnetic fluid material and a preparation method thereof, in particular to a perfluoropolyether oil-based magnetic fluid suitable for vacuum dynamic sealing, capable of meeting harsh ultra-static, high-temperature environments, and waterproof and oil-proof, and a preparation method thereof , belongs to the technical field of materials and their preparation. Background technique [0002] Magnetic fluid is a functional material invented by NASA in the mid-1960s. It is mainly composed of magnetic nanoparticles, surfactants and liquid phase carriers. Nanoparticles can stably exist in the liquid carrier without agglomeration and precipitation. Due to its superparamagnetic properties, it responds quickly to an applied magnetic field. Ferrofluid can be used in various aspects of industry such as vacuum sealing, damping, lubrication and so on. [0003] As a liquid carrier, perfluoropolyether has the characteristics of low ...

Claims

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Application Information

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IPC IPC(8): H01F1/44H01F1/42C08L71/00C08K9/04C08K3/22
Inventor 何小祥周建强杨阳
Owner 江苏海纳精密装备有限公司
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