Dispersed Systems pp 72-76 | Cite as
Phase transitions in phospholipid monolayers and rheological properties of the corresponding membrane model
Surfactant Aggregation
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Abstract
Insoluble spread monolayers of Dipalmitoyllecithin and Dipalmitoylcephalin are investigated by π/A isotherms and periodic compression and dilatation to determine their elasticity and the phase angles between strain and stress.
Depending upon the temperature, the phase angle becomes noticeable in the film pressure region in which the phase transition takes place.
From the rheological point of view, we conclude that the relaxation processes in the two-phase film state make the main contribution to the phase angle.
Key words
Phospholipid monolayers phase transition pressure-area isotherms surface rheology marangoni effectPreview
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© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988