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Can Sonochemistry take place in the absence of cavitation? – A complementary view of how ultrasound can interact with materials
Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2018-07-29 , DOI: 10.1016/j.ultsonch.2018.07.036
Mircea Vinatoru , Timothy J. Mason

A hypothesis is advanced for a mechanism by which ultrasound could help to activate chemical reactions, even in the absence of cavitation. It is suggested that the compression phase of an acoustic wave could produce transient solid-like structures within the solution. These structures would result in an “ordering effect” of the molecules in which electrical charges could develop. Such electrical charges could facilitate electron movement from one molecule to another triggering therefore chemical reactions. Such reactions could occur even in the absence of cavitation especially if the solvent or reagents employed show piezoelectric/electrostriction properties. Similar transient ordering effects could be induced by the shockwave accompanying bubble collapse and these would help to explain some of the anomalous effects observed in sonochemistry under cavitation.



中文翻译:

可以在没有气蚀的情况下进行声化学反应吗?–超声如何与材料相互作用的补充视图

对一种机制的假设已经提出,即使在没有气蚀的情况下,超声波也可以通过该机制来帮助激活化学反应。建议声波的压缩阶段可以在溶液内产生瞬态的类固体结构。这些结构将导致可能在其中产生电荷的分子的“有序效应”。 这种电荷可以促进电子从一个分子移动到另一个分子,从而触发化学反应。即使在没有气穴现象的情况下,也可能发生这种反应,特别是如果所使用的溶剂或试剂显示出压电/电致伸缩性质。伴随气泡破裂的冲击波可能会引起类似的瞬态有序效应,这将有助于解释在空化作用下声化学中观察到的一些异常效应。

更新日期:2018-07-30
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