| Autor: |
Nenad Mucic, Jelena Skrbic, Sandra Bucko, Lidija Petrovic, Jaroslav Katona, Valentin B. Fainerman, Eugene V. Aksenenko, Emanuel Schneck, Reinhard Miller |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Colloids and Interfaces, Vol 5, Iss 1, p 1 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2504-5377 |
| DOI: |
10.3390/colloids5010001 |
| Popis: |
In mixed solutions of anionic and cationic surfactants, called catanionics, ion pairs are formed which behave like non-ionic surfactants with a much higher surface activity than the single components. In equimolar mixtures of NaCnSO4 and CmTAB, all surface-active ions are paired. For mixtures with n + m = const, the interfacial properties are rather similar. Catanionics containing one long-chain surfactant and one surfactant with medium chain length exhibit a strong increase in surface activity as compared with the single compounds. In contrast, catanionics of one medium- and one short chain surfactant have a surface activity similar to that of the medium-chain surfactant alone. Both the Frumkin model and the reorientation model describe the experimental equilibrium data equally well, while the adsorption kinetics of the mixed medium- and short-chain surfactants can be well described only with the reorientation model. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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