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Method of concentrating nanoparticles and method of deaggregating aggregated nanoparticles

A technology for nanoparticle and solvent extraction, applied in the fields of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problem that the degree of fine dispersion is not sufficient and effective.

Inactive Publication Date: 2008-04-30
FUJIFILM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are also not sufficiently effective in terms of the degree of fine dispersion

Method used

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  • Method of concentrating nanoparticles and method of deaggregating aggregated nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0077] 410 mg of a pigment (Pigment Red 122) was dissolved in 120 ml of 1-methyl-2-pyrrolidone to obtain a pigment solution. Another 1000ml of water was prepared as a poor solvent.

[0078] Under the condition that the GK-0222-10 type Ramond mixer manufactured by Fuiisawa Pharmaceutical Co., Ltd. was used to stir the poor solvent at a speed of 500 rpm, the pigment solution was pumped in 50 ml by the NP-KX-500 type large-capacity non-pulsation pump manufactured by Nihon Seimitsu Kagaku Co., Ltd. The flow rate per minute was injected into the above-mentioned poor solvent maintained at 1° C. to obtain a nanopigment dispersion (particle diameter: 20 nm, Mv / Mn: 1.41).

[0079] 200ml of 2-(1-methoxy)propyl acetate was added to the above-prepared nano-pigment dispersion (concentration of nano-pigment: about 0.04% by weight), and the resulting mixture was stirred at 20°C at a speed of 100rpm Stir for 10 minutes to extract the nanopigments into the 2-(1-methoxy)propyl acetate phase to...

Embodiment 2

[0082] 610 mg of a pigment (Pigment Red 122) and 10 ml of a 1 mol / liter aqueous sodium hydroxide solution were dissolved in 120 ml of 1-methyl-2-pyrrolidone to obtain a pigment solution. In addition, 1000 ml of ultrapure water containing 8 ml of hydrochloric acid aqueous solution with a concentration of 1 mol / liter was prepared as a poor solvent.

[0083] Under the condition that the GK-0222-10 type Ramond mixer manufactured by Fuiisawa Pharmaceutical Co., Ltd. was used to stir the poor solvent at a speed of 500 rpm, the pigment solution was pumped in 50 ml by the NP-KX-500 type large-capacity non-pulsation pump manufactured by Nihon Seimitsu Kagaku Co., Ltd. The flow rate per minute was injected into the above-mentioned poor solvent maintained at 1° C. to obtain a nanopigment dispersion (particle diameter: 21 nm, Mv / Mn: 1.35).

[0084] 200 ml of 2-(1-methoxy)propyl acetate was added to the above-prepared nanopigment dispersion (concentration of nanopigment: about 0.06% by wei...

Embodiment 3

[0095] 410 mg of a pigment (Pigment Red 122) was dissolved in 120 ml of 1-methyl-2-pyrrolidone to obtain a pigment solution. Another 1000ml of water was prepared as a poor solvent.

[0096] Under the condition that the GK-0222-10 type Ramond mixer manufactured by Fujisawa Pharmaceutical Co., Ltd. was used to stir the poor solvent at a speed of 500 rpm, the pigment solution was pumped in 50 ml by the NP-KX-500 type large-capacity non-pulsation pump manufactured by Nihon Seimitsu Kagaku Co., Ltd. / min flow rate into the above-mentioned poor solvent whose temperature is kept at 1° C. to obtain a nano-pigment dispersion.

[0097] 200 ml of 2-(1-methoxy)propyl acetate was added to the above-prepared nanopigment dispersion (concentration of nanopigment: about 0.04% by weight), and the resulting mixture was stirred at 500 rpm at 25° C. 10 minutes, and let it stand for 180 minutes, so that the nanopigment is extracted into the 2-(1-methoxy)propyl acetate phase, thereby obtaining a co...

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Abstract

A method of concentrating nanoparticles, having the steps of: adding and mixing an extraction solvent with a nanoparticles-dispersion liquid that nanoparticles are dispersed in a dispersion solvent, thereby concentrating and extracting the nanoparticles into a phase of the extraction solvent, and removing the dispersion solvent by filter-filtrating a liquid of concentrated extract, in which the extraction solvent is substantially incompatible with the dispersion solvent, and the extract solvent can form an interface after the extraction solvent is mixed with the dispersion solvent and left the mixture still; further a method of deaggregating aggregated nanoparticles, having the steps of: applying two or more ultrasonic waves different in frequency to a liquid containing aggregated nanoparticles, and thereby fining and dispersing the aggregated nanoparticles.

Description

technical field [0001] The present invention relates to a method of producing nanoparticles, and more particularly to a method of efficiently concentrating nanoparticles contained in a dispersion and of efficiently deaggregating aggregated nanoparticles. Background technique [0002] Research into reducing the particle size has been conducted. In particular, much research is aimed at reducing the particle size to the nanometer size (for example, 10 nm to 100 nm), which is difficult to achieve by conventional crushing methods, precipitation methods, and other conventional methods. In addition, other studies aim not only to reduce the particle size to nanometer size, but also to obtain particles in a monodisperse state. [0003] Such nanoscale particles are different from macroparticles (larger in size) and from molecules and atoms (smaller in size). That is to say, the size of such nanoscale particles is between them. Thus, such nanoparticles are believed to exhibit novel ...

Claims

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Application Information

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IPC IPC(8): B01D11/02B82B3/00C09B67/46C09B67/54
Inventor 宫下阳介中西八郎笠井均增原阳人
Owner FUJIFILM CORP
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