Selection of Surfactants Pairs for Optimal Interfacial Properties

Selection of Surfactant Pairs for Optimal Interfacial Properties 

For Maximum Reduction of the CMC. Select surfactant pairs with the largest negative (3M values (strongest attractive interaction in mixed micelle formation). When interaction between the two surfactants is weak, i.e., (3M is a small negative number, select a pair with approximately equal CMC values. The surfactant with the smaller CMC should always be used in larger quantity than the one with the larger CMC. 

For Maximum Reduction of Surface (or Interfacial) Tension. Select surfactant pairs with the largest negative (3° (or (3°t or (32t) - (3M values. If this quantity is only a small negative number, use, if possible, two surfactants with approximately equal y values at their CMC. When this is not possible, the surfactant with the higher y value at its CMC should, preferably, have the smaller area/molecule at the interface. 

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III.D. Selection of Surfactant Pairs for Optimal Interfacial Properties... 

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