Abstract
Contact angles have been measured on smooth polyethylene, polytetrafluoroethylene, nylon, and polyester plates as a function of the surface pressure of insoluble monolayers at an air/salt solution interface. In all cases, surface tensions that gave zero contact angle at the solid were much lower than critical surface tensions established previously for the same solids using surfactant solutions or pure liquids. An analysis of the results shows transfer of monolayer to the more hydrophobic solid surfaces under conditions depending on the nature of the monolayer.
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