Adsorption of proteins and low molecular weight surfactants
at liquid/fluid interfaces influences several phenomena which are
important in many modern technologies, such as food processing,
cosmetics and pharmaceutical industry [1,2]. The formation and
stability of the products like foams and emulsions depend directly
on the adsorption and mechanical properties of such mixed systems.
The adsorption of such surface active substances and their
mixtures at the water/air interface has been widely investigated
with various methods and described by different models [3–11].
However, only few investigations were devoted to the oil/water
interface and the respective mixed adsorption layer. For example,
studies with -casein (BCS) were carried out at the water/ntetradecane
interface using tensiometry [12] or dilational stress
[13,14]. BCS was also investigated with neutron reflectivity at the
water/hexane [15], water/cyclohexane and at water/hexadecane
[16] interfaces.