Measurement of the effect of high-power ultrasound on wetting of paper

✍ Scribed by Jyrki Stor-Pellinen; Edward Hæggström; Mauri Luukkala

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 141 KB
• Volume: 38
• Category: Article
• ISSN: 0041-624X
• DOI: 10.1016/s0041-624x(00)00035-4

✦ Synopsis

High-power ultrasound has been known to promote penetration of liquids into porous materials. This work presents results of experimental investigations of the influence of 40 kHz high-power ultrasound on wetting processes of papers. Wetting was monitored by the measurement of the attenuation of 0.5-9 MHz ultrasound transmitted through the immersed sample. The samples were sized papers with contact angles 40 degrees, 70 degrees and 110 degrees, and the immersion liquids were isopropanol-water mixtures of 0-100% isopropanol concentration. The investigation showed that application of high-power ultrasound resulted in faster sorption processes. However, the absolute reduction in time to reach the stationary state was not very great.