FOAMINESS AND FOAM STABILITY OF SURFACTANT SOLUTIONS

A combined pneumatic and mechanical foam generator was constructed and tested by sodium-dodecyl-sulfate and sodium-dodecylbenzene-sulfonate solutions. The foams could be divided into three classes according to the proportion of air incorporated into the foam. For better understanding the foaminess the dynamic surface tension of the solutions were measured under the same dilatational velocity as the beater products during foam forming