Influence of Microwaves on the Water Surface Tension
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In this study, microwave irradiation was applied to hanging droplets of both water and ethylene glycol. Once the irradiation had ceased and the droplet was allowed to return to its original temperature, it was found that the surface tension of ethylene glycol returned to its original value. In contrast, the water surface tension remained well below its original value for an extended period of time. Similar observations have been reported for magnetically treated water, but this is the first time that such a lasting effect has been reported for microwave irradiation. The effect can be attributed to the unique hydrogen bonds of interfacial water molecules. While the irradiation intensities used in this study are well above those in household devices, there is certainly the potential to apply the methodology to industrial applications where the manipulation of surface tension is required without the use of chemical addition.
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Asada, M.; Kanazawa, Y.; Asakuma, Y.; Honda, I.; Phan, Chi (2015)© 2015 The Institution of Chemical Engineers. Surface tension of fluids is an important factor controlling multiphase systems and is often manipulated by surfactants during industrial processes. Previously, we have found ...
Asakuma, Y.; Nakata, R.; Asada, M.; Kanazawa, Y.; Phan, Chi (2016)© 2016 Elsevier LtdWater behavior during and after microwave irradiation is important phenomena for industrial applications. Recently, we reported a non-thermal effect of microwave on water surface tension. The bubble ...
Asada, M.; Kanazawa, Y.; Asakum, Y.; Honda, I.; Phan, Chi; Parmar, Harisinh Bhikhubhai; Pareek, Vishnu; Evans, G. (2014)In this study, microwave irradiation is applied to a liquid droplet and the surface tension, the circulation flow and temperature of water droplet are measured dynamically under the irradiation. The droplet was allowed ...