Structural effect on the adsorption properties of aqueous solutions of straight-chain and cyclic dodecyl sulfates

1993 ◽  
Vol 76 ◽  
pp. 217-225 ◽  
Author(s):  
D. Vollhardt ◽  
G. Czichocki ◽  
R. Rudert
Keyword(s):  
Aqueous Solutions ◽  
Structural Effect ◽  
Adsorption Properties ◽  
Straight Chain

Nucleation of single and mixed straight chain surfactants from dilute aqueous solutions

1996 ◽  
Vol 166 (1-4) ◽  
pp. 189-194 ◽  
Author(s):  
R.N.M.R. van Gelder ◽  
K.J. Roberts ◽  
J. Chambers ◽  
T. Instone
Keyword(s):  
Aqueous Solutions ◽  
Straight Chain ◽  
Dilute Aqueous Solutions

Assessment of adsorption properties of inorganic–organic hybrid cyclomatrix type polyphosphazene microspheres for the removal of Pb(II) ions from aqueous solutions

2018 ◽  
Vol 193 (11) ◽  
pp. 721-730 ◽  
Author(s):  
Tuğba Alp Arıcı ◽  
Simge Metinoğlu Örüm ◽  
Yasemin Süzen Demircioğlu ◽  
Adnan Özcan ◽  
A. Safa Özcan
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Properties ◽  
Organic Hybrid

Adsorption of sodium cyclododecylmethanoate and cycloundecylmethanoate at the air/water interface

1984 ◽  
Vol 62 (11) ◽  
pp. 2359-2363 ◽  
Author(s):  
Jan J. Spitzer
Keyword(s):  
Aqueous Solutions ◽  
Sodium Ion ◽  
Ion Concentration ◽  
Ionic Surfactants ◽  
Free Energies ◽  
Straight Chain ◽  
Double Chain ◽  
Adsorbed State ◽  
Critical Micelle Concentrations ◽  
Air Water Interface

Surface tension measurements on aqueous solutions of sodium cyclododecylmethanoate and sodium cycloundecylmethanoate in sodium carbonate/bicarbonate buffers and at constant sodium ion concentration at 25 °C were used to obtain the standard free energies of adsorption, the saturation areas per surfactant ion, and the critical "micelle" concentrations of these compounds. Similar measurements were done for solutions of sodium dodecanoate for comparisons.The standard free energies of adsorption of CH2 group that is located in a macrocyclic cycloalkyl ring appears to follow the "rule of two" (−RT ln 2) that is also valid for straight chain ionic surfactants. The saturation areas of both cyclododecylmethanoate and cycloundecylmethanoate are about 52 Å2/ion as compared to about 32 Å2/ion for normal dodecanoate.For large ring cycloalkylmethanoates the critical "micelle" concentrations appear to decrease by a factor of about 4/5 for each CH2 group added to the ring as compared to the factor of about 1/2 for each CH2 group added to the chain of normal alkanoates. The data suggest that large cycloalkyl rings have "collapsed ring", or "double chain", conformation in aqueous solutions and in the adsorbed state.

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