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@ARTICLE{Kiraly:46882,
author = {Kiraly, Z. and Findenegg, G. H. and Klumpp, E. and
Schlimper, H. and Dekany, I.},
title = {{A}dsorption calorimetric study of the organization of
sodium n-decyl sulfate at the graphite/solution interface},
journal = {Langmuir},
volume = {17},
issn = {0743-7463},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {PreJuSER-46882},
pages = {2420 - 2425},
year = {2001},
note = {Record converted from VDB: 12.11.2012},
abstract = {The material and enthalpy balances of the adsorption of
sodium n-decyl sulfate from aqueous solutions onto
graphitized carbon black were determined between 288 and 318
K by using an automated flow sorption/microcalorimeter
system. At low concentrations, the surfactant molecules form
a flat monomolecular film on the graphite plane, in
consequence of surface-directed ordering. A mechanism is
proposed in which two adsorbed phases coexist during the
formation of this surfactant monolayer. The enthalpy of
adsorption in the monolayer region is ca. -42 kJ mol(-1),
which does not depend appreciably on the temperature or on
the surface coverage. At higher concentrations, the ordered
monolayer induces surface aggregation to produce
half-cylindrical hemimicelles as the critical micelle
concentration is approached. The enthalpies of surface
aggregation at 288, 298, and 318 K are -10, -16, and -26 kJ
mol(-1), respectively. As the temperature is increased from
288 to 318 K, the average number of surfactant molecules in
the cross section of a half-cylinder drops from ca. 5.4 to
3.4. Calorimetric evidence is provided that cationic and
anionic surfactant adsorption on graphite follow the same
mechanism in the low-density and high-density adsorbate
regions.},
keywords = {J (WoSType)},
cin = {ICG-IV},
ddc = {670},
cid = {I:(DE-Juel1)VDB50},
pnm = {Stoffströme von Schwermetallen und organischen Substanzen
in der Umwelt},
pid = {G:(DE-Juel1)FUEK83},
shelfmark = {Chemistry, Multidisciplinary / Chemistry, Physical /
Materials Science, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000168100700025},
doi = {10.1021/la001552y},
url = {https://juser.fz-juelich.de/record/46882},
}