Ashokkumar Muthupandian, Lee Judy, Kentish Sandra, Grieser Franz
Particulate Fluids Processing Centre, Department of Chemical and Biomolecular Engineering, University of Melbourne, Vic. 3010, Australia.
Ultrason Sonochem. 2007 Apr;14(4):470-5. doi: 10.1016/j.ultsonch.2006.09.016. Epub 2007 Jan 17.
Acoustic cavitation is the fundamental process responsible for the initiation of most of the sonochemical reactions in liquids. Acoustic cavitation originates from the interaction between sound waves and bubbles. In an acoustic field, bubbles can undergo growth by rectified diffusion, bubble-bubble coalescence, bubble dissolution or bubble collapse leading to the generation of primary radicals and other secondary chemical reactions. Surface active solutes have been used in association with a number of experimental techniques in order to isolate and understand these activities. A strobe technique has been used for monitoring the growth of a single bubble by rectified diffusion. Multibubble sonoluminescence has been used for monitoring the growth of the bubbles as well as coalescence between bubbles. The extent of bubble coalescence has also been monitored using a newly developed capillary technique. An overview of the various experimental results has been presented in order to highlight the complexities involved in acoustic cavitation processes, which on the other hand arise from a simple, mechanical interaction between sound waves and bubbles.
声空化是引发液体中大多数声化学反应的基本过程。声空化源于声波与气泡之间的相互作用。在声场中，气泡可通过整流扩散、气泡合并、气泡溶解或气泡崩溃而生长，从而导致初级自由基的产生和其他二级化学反应。表面活性溶质已与多种实验技术结合使用，以分离和理解这些活动。频闪技术已用于通过整流扩散监测单个气泡的生长。多泡声致发光已用于监测气泡的生长以及气泡之间的合并。气泡合并的程度也已使用新开发的毛细管技术进行监测。本文概述了各种实验结果，以突出声空化过程中涉及的复杂性，而这种复杂性另一方面源于声波与气泡之间简单的机械相互作用。
