Foam Stability Study of Dilute Aqueous Nonionic Fluorinated Surfactant Systems
نویسندگان
چکیده
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.
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