Linear Compression of an Adsorbed Monolayer of Sodium Dodecyl Sulfate and Dodecanol

✍ Scribed by Peter Petrov; Paul Joos

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 163 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0453

✦ Synopsis

established for this surfactant. An example of such a sys-A theory is presented to describe the increase in the surface tem is sodium dodecyl sulfate ( SDS ) with a minor compressure of a mixed adsorbed monolayer under linear compresponent ( dodecanol ) . Experiments below and above the sion. This mixed monolayer contains a very soluble surfactant CMC are carried out. and a less soluble one as a minor component. This theory is a simplification of a more general one with two not very soluble THEORY surfactants. The presented theory is verified by experiments with SDS and dodecanol. Good agreement between theory and A mixed monolayer containing surfactant 1 (SDS), which experiment is obtained. For micellar systems, the minor compois very soluble, and a minor component, surfactant 2 (dodenent is solubilized in the micelles and the compression curves canol), is allowed to equilibrate, and afterward it is comare different from those for concentrations below the CMC.

pressed with a constant speed and the resulting increase in From the compression data the elasticity of the monolayer as a function of time is obtained.