抄録
A crucial characteristic of the microbubble is that they are electrically negative charged (ξ-potential) on their surface. Because of these characteristics, microbubbles have significant potential to be used for a variety of practical purposes. However, shrinkage behavior of microbubbles has not been clarified yet. Therefore, it is presumed that the shrinkage behavior is affected by the ξ-potential of microbubbles. hi the present study, we observed shrinkage behavior of microbubbles by changing the ξ-potential. The ξ-potential of microbubbles was varied by changing the pH conditions, because the ξ-potential of microbubbles was strongly affected by the pH of water. In this experiment, we observed shrinkage behavior of a microbubble in the degassed water (gel) by a high-speed microscope. The pattern of shrinkage behavior was classified as two types. It was confirmed that shrinkage behavior of microbubbles was strongly affected by the ξ-potential of microbubbles.
