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Potassium perfluorooctane sulfonate (KPFOS) and sodium perfluorooctane sulfonate (NaPFOS) exhibit poor surface activities in aqueous solution at room temperature because of their high Krafft points. In this work, we attempted to increase the solubility of KPFOS and NaPFOS and consequently improve their surface activities at room temperature with sodium p-methylbenzene sulfonate (BS) and urea, which...
The surface tension of dialkylammonium perfluorooctanoate [C 7 F 15 COONH 2 (C n H 2n+1 ) 2 , n=1–4], dialkylammonium perfluorooctylsulfonate [C 8 F 17 SO 3 NH 2 (C n H 2n+1 ) 2 , n=1–4] and trialkylammonium perfluorooctylsulfonate [C 8 F 17 SO 3 NH(C n H 2n+1...
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