TY - JOUR
T1 - Effect of surfactant addition on removal of microbubbles using ultrasound
AU - Kobayashi, Daisuke
AU - Hayashida, Yoshiyuki
AU - Sano, Kazuki
AU - Terasaka, Koichi
N1 - Funding Information:
This research was supported in a part by a Grant-in-Aid for Scientific Research (No. 20760524 ) from the Ministry of Education, Culture, Sports, Science and Technology, and the Circle for the Promotion of Science and Engineering.
PY - 2014/8
Y1 - 2014/8
N2 - It is difficult to control the bubble in a liquid by the external operation, because the behavior of the bubble is controlled in buoyancy and flow of liquid. On the other hand, microbubbles, whose diameter is several decades μm, stably disperse in static liquid because of their small buoyancy and electrical repulsion. When an ultrasound, whose frequency was 2.4 MHz, was irradiated, the milky white microbubbles suspended solution became rapidly clear. In this study, the effects of surfactant addition on the removal of microbubbles from a liquid in an ultrasonic field were investigated. The efficiency of removal of microbubbles decreased with surfactant addition. Surfactant type influenced the size of agglomerated microbubbles, and the efficiency of removal of microbubbles changed. The surface of microbubble was modified by surfactant adsorption, and the steric inhibition influenced the removal of microbubbles.
AB - It is difficult to control the bubble in a liquid by the external operation, because the behavior of the bubble is controlled in buoyancy and flow of liquid. On the other hand, microbubbles, whose diameter is several decades μm, stably disperse in static liquid because of their small buoyancy and electrical repulsion. When an ultrasound, whose frequency was 2.4 MHz, was irradiated, the milky white microbubbles suspended solution became rapidly clear. In this study, the effects of surfactant addition on the removal of microbubbles from a liquid in an ultrasonic field were investigated. The efficiency of removal of microbubbles decreased with surfactant addition. Surfactant type influenced the size of agglomerated microbubbles, and the efficiency of removal of microbubbles changed. The surface of microbubble was modified by surfactant adsorption, and the steric inhibition influenced the removal of microbubbles.
KW - Agglomeration
KW - Bjerknes force
KW - Microbubble
KW - Surfactant
KW - Ultrasound
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U2 - 10.1016/j.ultras.2014.03.010
DO - 10.1016/j.ultras.2014.03.010
M3 - Article
C2 - 24745307
AN - SCOPUS:84901847029
SN - 0041-624X
VL - 54
SP - 1425
EP - 1429
JO - Ultrasonics
JF - Ultrasonics
IS - 6
ER -