"The evaporation rate at 30°C of water droplets partially covered by surface active materials (SAM) were determined. While two of the SAM were studied at a single dew point depression (ΔTDP), seven others were examined over a range of ΔTDP values. It was found, by comparison with pure water drops under identical conditions, that SAM increases the evaporation rate as compared to the rate of an uncontaminated drop. The lack of effect of the hydrophobic chain length and the possible effect of the hydrophilic group on this phenomenon are discussed. The explanation proposed is that at 30°C thermal agitation of the hydrophobic chain causes a breakdown of the water structure and imparts extra energy to the molecules in the vicinity of the SAM. This corresponds to an elevation of the local temperature near the SAM and causes the overall evaporation rate of the drop to increase"--Abstract, page ii.
Stampfer, J. F.
Carstens, John C., 1937-
Roach, D. Vincent
M.S. in Chemistry
National Science Foundation (U.S.)
University of Missouri--Rolla
vii, 74 pages
© 1973 David Alan Sierawski, All rights reserved.
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Link to Catalog RecordElectronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library. http://laurel.lso.missouri.edu/record=b1067015~S5
Sierawski, David Alan, "A study of the ability of surface active materials to increase the evaporation rates of small, freely falling water drops" (1973). Masters Theses. 3362.