The influence of surface adsorption on microbubble dynamics
The influence of surface adsorption on microbubble dynamics
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表面吸附对微泡动力学的影响
DOI：
10.1098/rsta.2008.0001
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Eleanor Stride
中科院分区：
文献类型：
--
作者：
Eleanor Stride
在纯液体中，气体或蒸气微泡的行为主要由其大小、环境压力和周围液体的性质决定。然而，在实际应用中，微泡表面经常会吸附周围液体中的溶解物质，形成一层薄薄的涂层，这将显著影响微泡的稳定性和动态响应。这对包括水下声学、空化检测、医学成像和药物输送在内的广泛应用具有重要意义。本文的目的是回顾现有的理论处理包覆微泡，并提出和讨论一些最近的发展。结果表明，涂层的存在可以显著地改变微泡体积振荡的振幅、共振特性以及拉伸和压缩时的相对振幅。最后，将讨论提高对表面涂层在高频下动态行为的理解的必要性。
In a pure liquid, the behaviour of a gas or vapour microbubble is determined primarily by its size, the ambient pressure and the properties of the surrounding liquid. In practice, however, adsorption of a dissolved substance from the surrounding liquid onto the microbubble surface will often take place, producing a thin coating which can significantly affect both the microbubble's stability and its dynamic response. This can have important implications in a wide range of applications, including underwater acoustics, cavitation detection, medical imaging and drug delivery. The aim of this paper is to review the existing theoretical treatments of coated microbubbles and to present and discuss some recent developments. It will be shown that the presence of the coating can substantially modify the amplitude of microbubble volumetric oscillation, resonance characteristics and relative amplitude in tension and compression. Finally, the need for improved understanding of the dynamic behaviour of surface coatings at high frequencies will be discussed.