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Relaxation phenomena at the air-water interface with surfactants

Pawelec M. K., Sosnowski T. R.

International Journal of Applied Mechanics and Engineering

2003

Vol. 8, no spec.

295-300

Work is focused on experimental determination of dynamic mechanical properties (i.e. compressibility and relaxation parameters) of the air-water interface during compression in the presence of DPPC monolayer. The surface dynamics was studied with the Langmuir-Wilhelmy balance in several temperatures. The influence of another surfactant (CTAB) present in the aqueous subphase on the surface with DPPC was also investigated. Discussion of the results is based on the concepts of surface rheology and physical chemistry of the interface.