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Modified magnetic nanoparticle, preparation method thereof, non-polar solvent-based magnetic liquid, and preparation method and application of magnetic liquid

A technology of magnetic nanoparticles and magnetic liquids, applied in magnetic liquids, magnetic objects, magnetic materials, etc., can solve the problem that magnetic nanoparticles cannot be stably dispersed, achieve the best optical performance and magnetic performance, simple and fast operation, huge application Foreground effect

Inactive Publication Date: 2020-04-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The primary purpose of the present invention is to overcome the defects and deficiencies of the above-mentioned prior art, solve the problem that magnetic nanoparticles cannot be stably dispersed in non-polar solvents, and provide a method for preparing modified magnetic nanoparticles. Magnetic liquids prepared from nanoparticles can obtain excellent optical and magnetic properties in non-polar solvents

Method used

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  • Modified magnetic nanoparticle, preparation method thereof, non-polar solvent-based magnetic liquid, and preparation method and application of magnetic liquid
  • Modified magnetic nanoparticle, preparation method thereof, non-polar solvent-based magnetic liquid, and preparation method and application of magnetic liquid
  • Modified magnetic nanoparticle, preparation method thereof, non-polar solvent-based magnetic liquid, and preparation method and application of magnetic liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Example 1 Preparation of Modified Magnetic Nanoparticles Using Dichloromethane and KH570 as Modified Liquid

[0059] (1) Preparation of liquid A: Take 0.318g of sodium citrate dihydrate and 15mL of ethylene glycol and stir evenly in a magnetic stirrer. After the solution becomes a colorless and clear solution, add 1.5g of sodium acetate, add 1.2mL of water, and continue stirring until clear ;

[0060] Preparation of liquid B: take 0.819g FeCl 3 ·6H 2 Mix O with 15mL ethylene glycol in an ultrasonic oscillator until an orange clear liquid appears;

[0061] After mixing liquid A and liquid B, stir evenly in a magnetic stirrer, place in a reaction kettle, and react at 200°C for 10 hours. After taking it out, collect it by magnetic precipitation to obtain black powder crystals, and obtain 220 mg of Fe 3 o 4 magnetic nanoparticles.

[0062] (2) Fe obtained from step (1) 3 o 4 The magnetic nanoparticles were washed three times alternately with ethanol and deionized wat...

Embodiment 2

[0065] Example 2 Preparation of Magnetic Liquid in Toluene Using Dioctyl Sodium Succinate Sulfonate as Charge Control Agent Modified Magnetic Nanoparticles

[0066] (1) The modified magnetic nanoparticles synthesized in the above-mentioned Example 1 are washed three times with ethanol to wash away impurities therein; get 320 mg dioctyl succinate sodium sulfonate and mix with 10 mL toluene, vibrate in an ultrasonic oscillator until A clear liquid appears and a mixed liquid is obtained;

[0067] (2) Add the prepared mixed liquid into the modified magnetic nanoparticles, and mix uniformly in an ultrasonic oscillator, and the modified magnetic nanoparticles are uniformly dispersed in the mixed liquid to form a stable magnetic liquid.

Embodiment 3

[0068] Example 3 Preparation of modified magnetic nanoparticles configured with carbon tetrachloride and KH550 as a modification solution

[0069] (1) Preparation of liquid A: Take 0.275g of sodium citrate dihydrate and 10mL of ethylene glycol and stir evenly in a magnetic stirrer. After a colorless and clear solution appears, add 1g of sodium acetate and 1.1mL of water, and continue to stir until clear ;

[0070] Preparation of liquid B: Take 0.775g FeCl 3 ·6H 2 Mix O with 10mL ethylene glycol in an ultrasonic oscillator until an orange clear liquid appears;

[0071] After mixing liquid A and liquid B, stir evenly in a magnetic stirrer, place in a reaction kettle, and react at 250°C for 7 hours. After taking it out, collect it by magnetic precipitation to obtain black powder crystals, and obtain 220 mg of Fe 3 o 4 magnetic nanoparticles.

[0072] (2) Fe will be prepared 3 o 4 The magnetic nanoparticles were washed three times alternately with ethanol and deionized wate...

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Abstract

The invention discloses a modified magnetic nanoparticle, a preparation method thereof, a non-polar solvent-based magnetic liquid, and a preparation method and an application of the magnetic liquid. The preparation method of the modified magnetic nanoparticle comprises the following steps: preparing a Fe3O4 magnetic nanoparticle; carrying out a sol-gel reaction on the Fe3O4 magnetic nanoparticle and a silicon source to obtain a silica-coated magnetic nanoparticle, mixing the silica-coated magnetic nanoparticle with ethanol and ammonia water, and uniformly stirring under a 20-75 DEG C water bath condition to obtain a magnetic mixed solution; and adding a modifying solution into the magnetic mixed solution at a certain speed, and carrying out a modification reaction. The modified magnetic nanoparticle is uniform in particle size and morphology distribution and controllable in particle size, has good dispersity in polar solvents and non-polar solvents, can form a photonic crystal structure, has good magnetic properties, optical properties and chemical stability, can be used for preparing photonic crystals, electronic paper and the like, and has a huge application prospect in the fields of electronics, optics, chemical engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of magnetic nanometer material and magnetic liquid preparation. More specifically, it relates to a modified magnetic nanoparticle, a non-polar solvent-based magnetic liquid, a preparation method and use thereof. Background technique [0002] Magnetic fluid, also known as magnetic fluid, is a stable colloidal solution formed by stably dispersing nano-magnetic metal oxide particles in a base fluid. The base liquid and nano-magnetic metal oxide particles are not easily separated so that the magnetic liquid has both fluidity and magnetic properties. It has great application value in many life and production fields such as biomedicine, environmental protection, bioengineering, separation engineering, enzyme engineering, cytology, and materials science. [0003] Among the many synthesis methods of nanomagnetic metal oxide particles, solvothermal method and high temperature thermal decomposition method are the mo...

Claims

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Application Information

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IPC IPC(8): H01F1/00H01F1/01H01F1/44H01F41/00H01F41/02C01G49/08C01B33/12B82Y30/00
CPCB82Y30/00C01B33/12C01G49/08H01F1/0054H01F1/01H01F1/445H01F41/00H01F41/02
Inventor 庄琳郑玮涛王玮刘伍明
Owner SUN YAT SEN UNIV
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