Hexadecane—water—PTFE wetting cycle

Figure 4. Hexadecane/water/PTFE wetting cycle showing oil-wet-ting behavior.

The wetting behavior of liquid/liquid/solid systems is not only dependent on the two liquid phases, but upon the interaction of the solid surface with these liquids (see Equation 1). An example is in the wetting cycles for glass and PTFE in a hexadecane/water system. 

Figure 4 shows the data for PTFE used as the solid phase with the same liquid/liquid system where an oil-wetting cycle is observed. When wetting cycles for plates of the minerals dolomite and marble were obtained for the hexadecane/water system, hybrid wetting cycles such as those shown in Figure 5 were seen. 

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