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

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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 n

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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Example Embodiment

[0058] Example 1 Preparation of modified magnetic nanoparticles with dichloromethane and KH570 configuration modification solution

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

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

[0061] After mixing liquid A and liquid B, stir evenly in a magnetic stirrer, place in a reactor, and react at 200°C for 10 hours. After taking it out, it is collected by magnetic sedimentation to obtain black powder crystals to obtain 220 mg of Fe 3 O 4 Magnetic nanoparticles.

[0062] (2) The Fe obtained in step (1) 3 O 4 The magnetic nanoparticles are washed three times with ethanol and deionized water alternately...

Example Embodiment

[0065] Example 2 Preparation of a magnetic liquid of modified magnetic nanoparticles in toluene with dioctyl succinate sodium sulfonate as a charge control agent

[0066] (1) Wash the modified magnetic nanoparticles synthesized in the above embodiment 1 three times with ethanol to remove impurities; take 320 mg of dioctyl succinate sodium sulfonate and 10 mL of toluene and mix them, and oscillate in an ultrasonic oscillator until A clear liquid is presented, and a mixed liquid is obtained;

[0067] (2) The configured mixed liquid is added to the modified magnetic nanoparticles, mixed uniformly in an ultrasonic oscillator, and the modified magnetic nanoparticles are uniformly dispersed in the mixed liquid to form a stable magnetic liquid.

Example Embodiment

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

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

[0070] Preparation of liquid B: take 0.775g FeCl 3 ·6H 2 O and 10mL ethylene glycol are mixed in an ultrasonic oscillator until a clear orange liquid appears;

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

[0072] (2) The Fe obtained 3 O 4 The magnetic nanoparticles were washed three times with ethanol and deionized water alternately. After the impurit...

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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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