Dynamic ultrasound scattering allows us to investigate the particle motion and its average size via the time-evolution analysis of the scattering amplitude in optically turbid media. Recently, we proposed a novel particle sizing method that simultaneously analyzes the depth dependences on the sedimentation velocity and the scattered intensity without prior knowledge about the shape of the size distribution (Ultrasonics, 65 (2016) 59-68). In this study, the applicability of the technique to Fluorinert/water dilute and concentrated emulsions (up to 40 vol%) was examined. For the bimodal distribution of the emulsion, the size distribution of the particles was successfully obtained by directly probing the particle motion with different sizes as a function of the sample depth. The validity of the analysis was also investigated by comparing with conventional ultrasonic spectroscopy.

中文翻译：

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使用静态和动态超声散射技术分析水包油乳液的粒径分布

动态超声散射使我们能够通过光学混浊介质中散射幅度的时间演化分析来研究粒子运动及其平均尺寸。最近，我们提出了一种新的粒度测量方法，该方法可以在不了解粒度分布形状的先验知识的情况下，同时分析深度对沉降速度和散射强度的依赖性（Ultrasonics, 65 (2016) 59-68）。在这项研究中，检查了该技术对 Fluorinert/水稀释和浓缩乳液（高达 40 vol%）的适用性。对于乳液的双峰分布，通过直接探测不同尺寸的粒子运动作为样品深度的函数，成功地获得了粒子的尺寸分布。