ISSN:
1435-1536
Schlagwort(e):
Mixedmonolayers
;
tetradecanol
;
oleic acid
;
water/airinterface
;
interference between water/oil
;
microemulsions
;
adsorption isotherms
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
Notizen:
Abstract Mixed monolayers of tetradecanol and oleic acid at the water-air interface were studied to provide a static “related structure” featuring the interface between water and oil of water-dodecane microemulsions. The films of pure components as a function of temperature show a strong area contraction between 25 ° and 30 °C, caused by a change in the head groups hydration. This agrees with similar discontinuities found for some properties of the microemulsion in the same temperature range. At the water-air interface, the composition range of tetradecanol/oleic acid mixtures with the highest thermodynamic stability corresponds to the same stability range of the water-in -dodecane-potassium oleate microemulsions. Adsorption isotherms of tetradecanol and hexanol at the dodecane-water interface were studied to compare the surface behaviour of the two alcohols; the results indicate that the two alcohols have very similar two-dimensional surface phases and adsorption energies.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01417866
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