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A new approach to improve the stability of fecob/feb magnetic fluids

A magnetic liquid and stability technology, applied in the direction of magnetic liquid, magnetic objects, magnetic materials, etc., can solve the problems of particle modification and magnetic liquid that cannot be modified on the surface, achieve high stability, avoid mutual agglomeration and settlement, and be easy to promote Effect

Inactive Publication Date: 2018-06-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained FeCoB magnetic liquid / FeB magnetic liquid has high stability and does not modify the surface of the particles, which solves the problem that FeCoB / FeB particles cannot be used in the preparation of magnetic liquids because they cannot be surface modified

Method used

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  • A new approach to improve the stability of fecob/feb magnetic fluids
  • A new approach to improve the stability of fecob/feb magnetic fluids
  • A new approach to improve the stability of fecob/feb magnetic fluids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Raw materials are: FeCl 2 4H 2 O, CoCl 2 ·6H 2 O, NaBH 4 , n-hexane, span80, OP-10, distilled water. All reagents were of analytical grade.

[0054] A new process for preparing high-stability FeCoB magnetic liquid, comprising steps as follows:

[0055] (1) FeCl 2 、CoCl 2 Preparation of microemulsion: Weigh 1.0g FeCl 2 4H 2 O, 1.2g CoCl 2 ·6H 2 O was added to 7ml of distilled water, stirred at a low speed until it was completely dissolved, and then the dissolved solution was added dropwise to the mixture of n-hexane (22ml), span80 (4.7ml), and OP-10 (4.7ml), and fully stirred , to get FeCl 2 、CoCl 2 Microemulsion.

[0056] (2)NaBH 4 Preparation of microemulsion: weigh 1.2g NaBH 4 Add it into 2ml of distilled water and stir until it is completely dissolved, then add the dissolved solution dropwise into the mixed solution of n-hexane (6ml), span80 (1.3ml), OP-10 (1.3ml), stir well at low speed, and get NaBH 4 Microemulsion.

[0057] (3) Preparation of Fe...

Embodiment 2

[0059] Raw materials are: FeCl 2 4H 2 O, NaBH 4 , n-hexane, span80, OP-10, distilled water. All reagents were of analytical grade.

[0060] A new process for preparing high-stability FeB magnetic liquid, comprising steps as follows:

[0061] (1) FeCl 2 Preparation of microemulsion: weigh 2.7g FeCl 2 4H 2 O was added to 7ml of distilled water, stirred at a low speed until it was completely dissolved, and then the dissolved solution was added dropwise to the mixture of n-hexane (22ml), span80 (4.7ml), and OP-10 (4.7ml), and fully stirred. Get FeCl 2 Microemulsion.

[0062] (2)NaBH 4 Preparation of microemulsion: weigh 1.59g NaBH 4 Add it into 2ml of distilled water and stir until it is completely dissolved, then add the dissolved solution dropwise into the mixed solution of n-hexane (6ml), span80 (1.3ml), OP-10 (1.3ml), stir well at low speed, and get NaBH 4 Microemulsion.

[0063] (3) Preparation of FeCoB magnetic liquid: the NaBH that step (2) obtains 4 The micro...

Embodiment 3

[0065] Raw materials are: FeCl 2 4H 2 O, CoCl 2 ·6H 2 O, NaBH 4 , n-hexane, span80, OP-10, distilled water. All reagents were of analytical grade.

[0066] A new process for preparing high-stability FeCoB magnetic liquid, comprising steps as follows:

[0067] (1) FeCl 2 、CoCl 2 Preparation of microemulsion: Weigh 1.0g FeCl 2 4H 2 O, 1.2g CoCl 2 ·6H 2 O was added to 9ml of distilled water, stirred at a low speed until it was completely dissolved, then the dissolved solution was added dropwise to the mixed solution of n-hexane (24ml), span80 (5.1ml), OP-10 (5.1ml), and fully stirred , to get FeCl 2 、CoCl 2 Microemulsion.

[0068] (2)NaBH 4 Preparation of microemulsion: weigh 1.2g NaBH 4 Add it into 2ml of distilled water and stir until it is completely dissolved, then add the dissolved solution dropwise into the mixed solution of n-hexane (7ml), span80 (1.5ml), OP-10 (1.5ml), and stir fully at a low speed to obtain NaBH 4 Microemulsion.

[0069] (3) Preparatio...

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Abstract

The invention provides a new method for preparing FeCoB / FeB magnetic liquid. FeCl2.4H2O aqueous solution and / or CoCl2.6H2O aqueous solution with the intermixture of n-hexane, span80 and OP 10 are evenly mixed to obtain FeCl2 micro emulsion and / or CoCl2 micro emulsion. NaBH4 aqueous solution with the intermixture of n-hexane, span80 and OP 10 are evenly mixed to obtain NaBH4 micro emulsion. The FeCl2 micro emulsion and / or CoCl2 micro emulsion with NaBH4 micro emulsion are evenly mixed for normal temperature reaction, and precipitate is removed to obtain FeCoB magnetic liquid. The method is simple in steps, convenient to operate and high in practicality.

Description

technical field [0001] The invention belongs to the field of magnetic liquid preparation, in particular to a new method for improving the stability of FeCoB / FeB magnetic liquid. Background technique [0002] As a functional material with both magnetic properties and liquid fluidity, magnetic fluid has a wide range of applications in sealing, lubrication, and targeted drug therapy. The stability of magnetic liquid directly affects its service life. At present, the general method to improve the stability of magnetic liquid is to modify the surface of magnetic particles. No sedimentation and agglomeration in the liquid [Fang, F.F.; Hyoung, J. Sequential coating of magnetic carbonyliron particles with polystyrene and multiwalled carbon nanotubes and its effect on their magnetorheology. ACS Appl. Mater. Interf. 2010, 2, 54–60.]. This method for Fe 3 o 4 ,ZnFe 2 o 4 ,CoFe 2 o 4 And other magnetic particles have a very good effect. However, for some particles with good mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44
CPCH01F1/442
Inventor 边秀房赵树春
Owner SHANDONG UNIV