Foam Stability Study of Dilute Aqueous Nonionic Fluorinated Surfactant Systems
Foaming properties of dilute aqueous nonionic fluorinated surfactants, perfluoroalkyl sulfonamide ethoxylate, C8F17SO2N (C3H7)(CH2CH2O)nH (abbreviated as C8F17EOn, n = 10, 20) has been studied at 25°C. Both the surfactants produced a large volume of foams that are stable for several hours to a few days depending upon the surfactant concentration. The foam stability increases with increasing the surfactant concentration within the studied surfactant concentration limit. The C8F17EO10 /water system shows higher foam stability than that of the C8F17EO20 /water system. The foaming properties of the present systems show good correlation between dynamic surface tension properties and the dilatational surface elasticity.
Journal of Nepal Chemical SocietyVol. 22, 2007 pp. 47-54
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