De-gassed water is a better cleaning agent.
It is demonstrated that de-gassed water is more effective at dispersing hydrophobic "dirt", such as liquid hydrocarbons or oils. This effect appears to be due to the reduction of natural cavitation, which would otherwise oppose the dispersion of hydrophobic liquid droplets into water. De-gassing of the oil enhances this effect still further, and this has led to a proposal for a novel cleaning process, based on using a combination of a de-gassed (hydrophobic) solvent followed by rinsing in de-gassed water. This method might be useful as an effective, detergent-free cleaning process. Also reported are some initial studies which suggest that the effect of "inert" dissolved gases on the electrical conductivity of water may need to be reconsidered.
Pashley
R M
RM
Department of Chemistry, The Australian National University, Canberra, ACT 0200, Australia. richard.pashley@anu.edu.au
Rzechowicz
M
M
Pashley
L R
LR
Francis
M J
MJ