METHOD FOR DISPERSING FINE PARTICLE AND DISPERSION

PROBLEM TO BE SOLVED: To provide a method and an apparatus for excellently dispersing fine particles which easily agglomerate in the conventional technique, into water; an aqueous dispersion produced by the dispersing method; and a new process for dispersing fine particles whose dispersion performan...

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Hauptverfasser: ITO MICHIKO, ASANO HIROSHI, ASAMI ETSUO, AOKI TAKESHI, TAKASHIMA NARITSUYO, YAMAGUCHI KOICHI, MURASE YOSHIAKI, OKA MASATO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method and an apparatus for excellently dispersing fine particles which easily agglomerate in the conventional technique, into water; an aqueous dispersion produced by the dispersing method; and a new process for dispersing fine particles whose dispersion performance in the water is enhanced while modifying surface properties of the fine particles themselves and in which addition of salt, a resin, a dispersant or the like and troublesome study on the addition thereof are eliminated.SOLUTION: The method for dispersing fine particles includes the steps of: immersing one of a pair of electrodes into water or bringing it into contact with the water surface and disposing the other one in the air above the water surface; and using liquid surface plasma which is generated by applying a voltage between the pair of electrodes located at the water surface and above the water surface; and dispersing fine particles into the water. According to the dispersing method, an aqueous dispersion keeping a stably dispersed state can be produced. When mechanical dispersion treatment is used together with the dispersion method, capability of loosening agglomeration of fine particles can be enhanced and more efficient dispersion can be attained.