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A kind of feooh-znfe2o4 mixed magnetic liquid and preparation method thereof

A feooh-znfe2o4, magnetic liquid technology, applied in magnetic liquids, chemical instruments and methods, luminescent materials, etc., can solve problems that have not been reported in the literature, and achieve the effects of low raw material cost, improved magneto-optical properties, and easy process.

Inactive Publication Date: 2016-01-06
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the world, some research groups have carried out experimental research on the mixture of magnetic liquid (including magnetorheological fluid) with two kinds of particle dispersion phases. There are many studies on the magnetic liquid model of the dispersion system of large and small particles. Theoretical research and experimental research of a mixed magnetic liquid bidisperse system also mainly focus on the dispersion system of strong magnetic particles and weak magnetic particles, for example, γ-Fe 2 o 3 -ZnFe 2 o 4 、CoFe 2 o 4 -p-MgFe 2 o 4 , but two kinds of weak magnetic particles FeOOH-ZnFe 2 o 4 The dispersion system of mixed magnetic liquid has not been reported in the literature

Method used

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  • A kind of feooh-znfe2o4 mixed magnetic liquid and preparation method thereof
  • A kind of feooh-znfe2o4 mixed magnetic liquid and preparation method thereof
  • A kind of feooh-znfe2o4 mixed magnetic liquid and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of α-FeOOH particles

[0037] a. Add 1mol / L FeCl 3 Mix 80mL of solution and 500mL of 0.6mol / L NaOH solution evenly, then heat to boiling on the electric stove, keep for 5min, stop heating; take it off from the electric stove, cool to room temperature naturally, after about two hours, orange precipitates out; the precipitation is complete Carry out centrifugation afterwards, pour off supernatant, obtain precipitate I;

[0038] b. Add the precipitate I to 0.25mol / L Fe(NO 3 ) 3 In 400mL of the solution, heat to boiling on an electric stove, keep boiling for 30min, stop heating; take it off from the electric stove, let it cool down to room temperature naturally; centrifuge, pour off the clear liquid to obtain Precipitate II;

[0039] c. Use HNO with a volume 7 times that of the precipitate II 3 solution (0.01mol / L) to wash the precipitate II to pH = 7, and then dehydrate the precipitate II 3 times with acetone 7 times the volume of the precipitate II to ...

Embodiment 2

[0054] (1) Preparation of α-FeOOH particles

[0055] a. Add 1mol / L FeCl 3 Mix 70mL of solution and 500mL of 0.6mol / L NaOH solution evenly, then heat to boiling on the electric stove, keep for 3min, stop heating; take it off from the electric stove, cool to room temperature naturally, after about two hours, orange precipitates out; the precipitation is complete Carry out centrifugation afterwards, pour off supernatant, obtain precipitate I;

[0056] b. Add the precipitate I to 0.3mol / L Fe(NO 3 ) 3 In 400mL of the solution, heat to boiling on an electric stove, keep boiling for 20min, stop heating; remove from the electric stove, cool to room temperature naturally; centrifuge, pour off the clear liquid to obtain Precipitate II;

[0057] c. Use HNO5 times the volume of the precipitate II 3 solution (0.03mol / L) to wash the precipitate II to PH = 7, and then dehydrate the precipitate II 3 times with acetone 5 times the volume of the precipitate II to obtain the precipitate III,...

Embodiment 3

[0070] (1) Preparation of α-FeOOH particles

[0071] a. Add 1mol / L FeCl 3 Mix 90mL of solution and 500mL of 0.6mol / L NaOH solution evenly, then heat to boiling on the electric stove, keep for 10min, stop heating; take it off from the electric stove, cool to room temperature naturally, after about two hours, orange precipitates out; the precipitation is complete Carry out centrifugation afterwards, pour off supernatant, obtain precipitate I;

[0072] b. Add the precipitate I to 0.2mol / L Fe(NO 3 ) 3 In 400mL of the solution, heat to boiling on an electric stove, keep boiling for 40min, stop heating; remove from the electric stove, and cool to room temperature naturally; centrifuge, pour off the clear liquid to obtain Precipitate II;

[0073] c. Use HNO with a volume 6 times that of the precipitate II 3 solution (0.02mol / L) to wash the precipitate II to pH = 7, and then dehydrate the precipitate II 3 times with acetone 6 times the volume of the precipitate II to obtain the pr...

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Abstract

The invention aims at providing a FeOOH-ZnFe2O4 mixed magnetic fluid. The mixed magnetic fluid comprises a FeOOH magnetic fluid and a ZnFe2O4 magnetic fluid in the volume ratio of (1-2): (1-3), wherein the FeOOH magnetic fluid comprises alpha-FeOOH nano-particles and a HNO3 solution, the volume percentage of the nano-particles in the FeOOH magnetic fluid is 0.2-2%, and the molar ratio of H<+> to metal ions is (0.03-0.07): 1; and the ZnFe2O4 magnetic fluid comprises ZnFe2O4 nano-particles and the HNO3 solution, the volume percentage of the nano-particles in the ZnFe2O4 magnetic fluid is 0.2-2%, and the molar ratio of H<+> to metal ions is (0.03-0.07): 1. The mixed magnetic fluid has excellent magneto-optical properties. The invention further provides a preparation method of the mixed magnetic fluid. The preparation method has the advantages of simplicity, easiness in operation of the process, low cost of raw materials and low energy consumption.

Description

technical field [0001] The invention belongs to the field of magneto-optical materials. More specifically, the present invention relates to a FeOOH-ZnFe 2 o 4 Mixed magnetic liquid and method for its preparation. Background technique [0002] Magnetic fluids are usually colloidal systems formed by stably suspending nano-magnetic particles in a base fluid. The ionic magnetic liquid has a small hydrodynamic diameter and good fluidity. Its magneto-optic effect has a fast response speed, good switching characteristics, and good repeatability. It combines two or more ionic types with different physical or chemical properties. The mixed magnetic liquid of magnetic liquid is expected to be a functional material with novel properties. The properties of one of the nanoparticles can play a very important role in modulating the macroscopic properties of the system. [0003] In the world, some research groups have carried out experimental research on the mixture of magnetic liquid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/60H01F1/44
Inventor 王安蓉邵宇丰谭晓玲王悦善韦鹏志
Owner CHONGQING THREE GORGES UNIV