Wetting Films Stabilized by Hydrophobically Modified Inulin Polymeric Surfactant

Wetting Films Stabilized by Hydrophobically Modified Inulin Polymeric Surfactant 

The general trend of the variation of film thickness with INUTEC SPl concentration is difficult to explain. Although not too large, the change of film thickness is significant and repeatable. The following qualitative picture could be drawn up on basis these data. It may be rationalized in terms of the adsorption and orientation of the polymeric surfactant at the solid-liquid and liquid-air interface. At low Cspi the INUTEC SPl 

The Debye length 1/k has been calculated from the expression  

Similar behavior has been observed earher with emulsion films 8). Above a critical electrolyte concentration the significant compression of the double layer means that the steric repulsion of the loops and tails of the INUTEC SPl determines the film thickness. The slow decrease in film thickness with increasing electrolyte concentration above Cei,a- may he caused by some dehydration of the polyfructose loops and tails. 

A series of studies of microscopic thin hquid films, both symmetric (foam and 0/Wemulsion films) and asymmetric (wetting films), from aqueous solutions of 

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