Table 2.
Reported values of critical micelle concentration (CMC), the surface tension at CMC (γCMC), surface excess concentration (Γmax), and minimum area per molecule at air–water interface (Amin) for cationic surface-active ionic liquids (CSAILs) at 298.15 K in aqueous medium.
| CSAILs | CMC (mM) | γCMC (mN.m–1) | Γmax (μmol.m–2) | Amin (Å2) | References |
|---|---|---|---|---|---|
| [C4mim]Cl | 935b | — | — | — | Singh and Kumar, 2007 |
| [C4mim]BF4 | 952b | — | — | — | Singh and Kumar, 2007 |
| 729c | — | — | — | Singh and Kumar, 2008b | |
| [C6mim][Cl] | 902.8a | 39.2 | 1.3 | 130 | Vaghela et al., 2011 |
| [C6mim][Br] | 470a | 33.6 | 2.0 | 83 | Vaghela et al., 2011 |
| [C6mim][I] | 250.3a | 34 | 1.3 | 124 | Vaghela et al., 2011 |
| [C8mim]Cl | 101.7a | 28.3 | 1.6 | 104 | Vaghela et al., 2011 |
| 90b | — | — | — | Singh and Kumar, 2007 | |
| 100c | — | — | — | Singh and Kumar, 2008b | |
| [C8mim]Br | 120a | 28.7 | 2.7 | 60 | Vaghela et al., 2011 |
| [C8mim]I | 94.9a | 28.2 | 1.4 | 117 | Vaghela et al., 2011 |
| [C8mim]BF4 | 28c | — | — | — | Singh and Kumar, 2008b |
| [C8mim][CH3COO] | 220c | — | — | — | Wang et al., 2008 |
| [C8mim][NO3] | 150c | — | — | — | Wang et al., 2008 |
| [C8mim][CF3COO] | 120c | — | — | — | Wang et al., 2008 |
| [C9mim]Br | 74c | — | — | — | Vanyúr et al., 2007 |
| [C10mim]Cl | 39.9 | — | — | 85 | El Seoud et al., 2007 |
| [C10mim]Br | 29.3a | 39.7 | 1.72 | 96.7 | Dong et al., 2007 |
| 41c | — | — | — | Vanyúr et al., 2007 | |
| [C10pim]Br | 9.30a | 38.3 | 1.90 | 87.4 | Shi et al., 2011 |
| [C12mim]Cl | 13.17a | — | — | 72 | El Seoud et al., 2007 |
| [C12mim]Br | 10.9 | 39.4 | 1.91 | 86.8 | Dong et al., 2008 |
| 9.8c | — | — | — | Vanyúr et al., 2007 | |
| [C12pim]Br | 2.34a | 38.4 | 2.09 | 79.4 | Shi et al., 2011 |
| [C12mim]BF4 | 9.2 a | 38.2 | 2.16 | 76.7 | Dong et al., 2007 |
| [C14mim]Cl | 2.98a | — | — | 56 | El Seoud et al., 2007 |
| 3.2a | — | — | — | Łuczak et al., 2010 | |
| [C14mim]Br | 2.8a | 39.2 | 1.96 | 84.7 | Dong et al., 2008 |
| 2.5c | — | — | — | Vanyúr et al., 2007 | |
| [C14pim]Br | 0.61a | 38.3 | 2.21 | 75.1 | Shi et al., 2011 |
| [C16mim]Cl | 0.87a | — | — | 49 | El Seoud et al., 2007 |
| 1.1c | — | — | — | Łuczak et al., 2010 | |
| [C16mim]Br | 0.55a | 39.1 | 2.03 | 81.6 | Dong et al., 2008 |
| 0.6c 1 | — | — | — | Vanyúr et al., 2007 | |
| [C16hpim]Br | 0.56a | 43.4 | 1.99 | 83.2 | Li et al., 2010 |
| [C16mim][HBS] | 0.38a | 33.5 | 2.62 | 63 | Singh et al., 2016 |
| [C16mim][BS] | 0.33a | 33.7 | 2.26 | 73 | Singh et al., 2016 |
| [C16mim][PTS] | 0.20a | 31.0 | 2.13 | 78 | Singh et al., 2016 |
| [C18mim]Cl | 0.45a | — | — | — | Łuczak et al., 2010 |
a
Surface tension measurement.
b
NMR spectroscopy.
c
Conductivity measurement.