 |
| Titel |
Enhanced uptake of water by oxidatively processed oleic acid |
| VerfasserIn |
A. Asad, B. T. Mmereki, D. J. Donaldson |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 4, no. 8 ; Nr. 4, no. 8 (2005-10-19), S.2083-2089 |
| Datensatznummer |
250002062
|
| Publikation (Nr.) |
 copernicus.org/acp-4-2083-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
| A quartz crystal microbalance apparatus has been used to measure the room
temperature uptake of water vapour by thin films of oleic acid as a function
of relative humidity, both before and following exposure of the films to
various partial pressures of gas phase ozone. A rapid increase in the
water-sorbing ability of the film is observed as its exposure to ozone is
increased, followed by a plateau region in which additional water is taken
up more gradually. In this fully-processed region the mass of water taken up
by the film is about 4 times that of the unprocessed film. Infrared spectra
of the films, measured after variable exposures to ozone, show dramatic
increases in both the "free" and hydrogen-bonded O-H stretching regions,
and a decrease in the intensity of olefinic features. These results are
consistent with the formation of an oxygenated polymeric product or
products, as well as the gas phase products previously identified. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|