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Hydrophobic nano particles and process for preparing dispersion liquid thereof

A nanoparticle and lipophilic technology, which is applied in the field of preparation of lipophilic magnetic nanoparticles and their dispersions, can solve the problems of incompleteness and reduce the dispersing ability of magnetic nanoparticles, and achieve a large density value and good hydrophilic dispersion. Characteristics, the effect of strong magnetic susceptibility

Inactive Publication Date: 2008-04-23
盛蓉生 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the existing lipophilic treatment method carried out on the surface of magnetic nanoparticles, what is formed on the surface of magnetic nanoparticles is often an incomplete monolayer, or a monolayer with partial double layers ( figure 1 , figure 2 ), in both cases the dispersibility of magnetic nanoparticles in non-polar organic media is reduced due to the presence of a partially hydrophilic surface

Method used

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  • Hydrophobic nano particles and process for preparing dispersion liquid thereof
  • Hydrophobic nano particles and process for preparing dispersion liquid thereof
  • Hydrophobic nano particles and process for preparing dispersion liquid thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] 0.2moL / L FeCl 2 and 0.4moL / L FeCl 3 Mix with concentrated ammonia water, react for 1 minute, add 200 times the amount of water at 10°C, stir at 10,000 rpm for 2.5 hours; separate the prepared Fe 3 o 4 Nanoparticles, washed twice with pure water, adding pH 8.4 aqueous solution under stirring at 4000rpm, then mixing with 2.5 times the calculated amount of sodium oleate under stirring at 4000rpm, heating and reacting at 85°C for 20 minutes, cooling to 25°C, adjusting pH to 5.2, using the method of applying an external magnetic field to separate the precipitated magnetic nanoparticles precipitate; the precipitate was washed once with acidic water of pH 4.2, then washed three times with pure water and then dried; the lipophilic Fe after drying 3 o 4 The particulate precipitate is directly dispersed in the diffusion pump oil to form lipophilic Fe 3 o 4 Magnetic nanodispersion liquid. The magnetic liquid film prepared from this dispersed liquid can exhibit strong magnetorh...

Embodiment 2

[0053] The prepared Fe 3 o 4 Nanoparticles were separated at 10000rpm, washed twice with pure water, added an aqueous solution of pH 9.2 under stirring at 4000rpm, then mixed with 2.3 times the amount of octyl phosphate under stirring at 6000rpm, heated and reacted at 90°C for 15 minutes, and then cooled to 25°C, adjust the pH to 4.6, and separate the precipitated magnetic nanoparticles by applying an external magnetic field; the precipitate is washed once with acidic water with pH 5.2, then washed with pure water three times and then dried; the lipophilic Fe after drying 3 o 4 Magnetic particle precipitation is directly dispersed in kerosene to obtain lipophilic Fe 3 0 4 Magnetic nanodispersion liquid.

Embodiment 3

[0055] The prepared Co x Ni (1-x) Fe 2 o 4 Nanoparticles are separated by applying a magnetic field, washed 3 times with pure water, added an aqueous solution with a pH of 10.5 under stirring at 6000rpm, and then mixed with 3 times the amount of sodium oleate under stirring at 5000rpm, and heated and reacted at 70°C for 40 minutes , cooled to 25°C, adjusted the pH to 5.3, and separated the precipitated magnetic nanoparticles by applying an external magnetic field; the precipitate was washed once with acidic water of pH 4.8, then washed three times with pure water and then dried; Ester Co x Ni (1-x) Fe 2 o 4 Magnetic particle precipitation was directly dispersed in olive oil to obtain lipophilic Co x Ni (1-x) Fe 2 o 4 Magnetic nanodispersion liquid.

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Abstract

This invention relates to esterophilic magnetic nanometer particle and its dispersion liquid, which comprises the following process steps: processing magnetic nanometer particles; dissipating of the particle esterophilic in the non-electrode solvent agent; mixing the iron salt and alkali solvent for reaction to process magnetic nanometer particles; mixing the processed nanometer particles with the surface activity agent and adjusting the mixture liquid Ph value to esterophilic reaction; then adding acid to adjust the Ph value to acid range to deposit the nanometer particle for washing orderly by acid water and drying.

Description

technical field [0001] The invention relates to a preparation technology of lipophilic magnetic nano particles and dispersion liquid thereof. technical background [0002] Nanoparticles refer to particles whose size is in the range of 1-100 nm (ie, nanoscale). This kind of nano-scale particles has unique advantages: large specific surface area, magnetic controllability of magnetic particles, various modification processes can be selected for particle surface design, etc. The liquid exhibits rheological properties different from conventional liquids, so It has special uses in various scientific and technological fields such as machinery, construction, precision instrument manufacturing, medical diagnosis, pharmaceuticals, coatings, dyes, catalysts, inks, and magnetic storage media. In recent years, research on magnetic vascular embolism agents, magnetic resonance image contrast enhancers, retinal detachment therapeutic agents, and magnetic separation carriers has been widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44B01F3/12
Inventor 朱绫盛蓉生
Owner 盛蓉生
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