NANOPARTICLE DISPERSING APPARATUS USING ULTRASONIC STREAMING AND SHOCK WAVES

• Main Authors: KIM, Ji Hyang, KIM, Moo Joon, KIM, Jung Soon
• Format: Patent
• Language: English; French; Korean
• Published: 30.11.2017
• Subjects: FOR PERFORMING MECHANICAL WORK IN GENERAL; GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL; METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TRANSPORTING

The present invention relates to a nanoparticle dispersing apparatus for effectively dispersing nanoparticles. The present invention solves the problems of: a conventional ultrasonic dispersing apparatus, which has difficulty in generating strong acoustic power because of the use of planar ultrasonic waves and has a non-uniform dispersion due to a standing wave sound field distribution; and a conventional circulating focused ultrasonic dispersing apparatus, which is limited in size because of the use of cylindrical single piezoelectric vibrators, and thus the present invention provides a nanoparticle dispersing apparatus using ultrasonic streaming and shock waves, the apparatus: being capable of causing effective erosive dispersion in agglomerated particles in a nanoparticle suspension by means of shock waves by using a plurality of piezoelectric vibrators, and simultaneously causing fracture dispersion due to fluid shear force by generating a vortex in the nanoparticle suspension by tilting the radiation surface of the piezoelectric vibrator so as to cause an ultrasonic streaming effect; guiding uniform dispersion such that the ultrasonic streaming radiated from each vibrator forms a vortex in the suspension by circularly arranging the radiation surfaces of the plurality of piezoelectric vibrators at predetermined angles with respect to the tangent of the inner surface of the cylinder; and simultaneously being capable of preventing foreign material from being mixed through a pump by implementing a complete non-contact dispersion, and easily being expandable into a large-capacity dispersing apparatus. La présente invention concerne un appareil de dispersion de nanoparticules pour disperser efficacement des nanoparticules. La présente invention résout les problèmes : d'un appareil de dispersion ultrasonore classique, qui a des difficultés à produire une puissance acoustique forte en raison de l'utilisation d'ondes ultrasonores planes et présente une dispersion non uniforme due à une distribution de champ sonore à ondes fixes ; et d'un appareil de dispersion ultrasonore concentrée à circulation classique, dont la taille est limitée en raison de l'utilisation de vibreurs piézoélectriques cylindriques uniques, et ainsi la présente invention concerne un appareil de dispersion de nanoparticules utilisant un flux ultrasonore et des ondes de choc, l'appareil : pouvant provoquer une dispersion érosive efficace dans des particules agglomérées d'une suspension de nanoparticules au moyen d'ondes de choc grâce à l'utilisation d'une pluralité de vibreurs piézoélectriques, et provoquer simultanément une dispersion de fracture due à la force de cisaillement de fluide grâce à la production d'un tourbillon dans la suspension de nanoparticules par l'inclinaison de la surface de rayonnement du vibreur piézoélectrique de façon à provoquer un effet de flux ultrasonore ; guidant la dispersion uniforme de telle sorte que le flux ultrasonore rayonnant depuis chaque vibreur forme un tourbillon dans la suspension par l'agencement circulaire des surfaces de rayonnement de la pluralité de vibreurs piézoélectriques selon des angles prédéfinis par rapport à la tangente de la surface intérieure du cylindre ; et pouvant simultanément empêcher un matériau étranger d'être mélangé par le biais d'une pompe par la mise en oeuvre d'une dispersion complète sans contact, et pouvant être facilement extensible dans un appareil de dispersion de grande capacité. 본 발명은 나노입자를 효과적으로 분산시키기 위한 나노입자 분산장치에 관한 것으로, 본 발명에 따르면, 평면 초음파를 사용함으로 인해 강력한 음향파워를 발생시키기 어렵고 정재파 음장분포로 인한 불균일 분산의 문제점이 있었던 종래기술의 초음파 분산장치 및 원통형 단일 압전진동자를 사용함으로 인해 그 크기에 제한이 있었던 종래기술의 순환식 집속초음파 분산장치들의 문제점을 해결하여, 다수의 압전진동자를 이용하여 충격파에 의해 나노입자 현탁액 내의 응집된 입자들에 효과적인 침식분산을 일으킬 수 있고, 압전진동자의 방사면에 경사를 주어 초음파 스트리밍 효과를 야기하는 것에 의해 나노입자 현탁액 내에 와류를 발생시켜 유체 전단력에 의한 분열분산을 동시에 일으킬 수 있는 데 더하여, 복수의 압전진동자의 방사면을 원통의 내면의 접선에 대하여 일정 각도를 주어 원형으로 배열하는 것에 의해 각 진동자들로부터 방사된 초음파 스트리밍이 현탁액 내부에 와류를 형성하도록 하여 균일한 분산을 유도하고, 완전한 비접촉식 분산을 구현하여 펌프를 통한 이물질의 혼입을 방지하는 동시에, 대용량의 분산장치로 용이하게 확장이 가능하도록 구성되는 초음파 스트리밍 및 충격파를 이용한 나노입자 분산장치가 제공된다.