Partitioning of amphiphilic additives between the micelles of n-alkyltrimethylammonium bromides and the surrounding aqueous solution as a function of surfactant chain length

1990 ◽  
Vol 94 (6) ◽  
pp. 2518-2523 ◽  
Author(s):  
Mohammed. Abu-Hamdiyyah ◽  
Kamlesh. Kumari
Keyword(s):  
Aqueous Solution ◽  
Chain Length ◽  
Alkyltrimethylammonium Bromides

Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions

1987 ◽  
Vol 65 (5) ◽  
pp. 990-995 ◽  
Author(s):  
Gérald Perron ◽  
Josée Francoeur ◽  
Jacques E. Desnoyers ◽  
Jan C. T. Kwak
Keyword(s):  
Thermodynamic Properties ◽  
Chain Length ◽  
Polymer Concentration ◽  
Heat Capacities ◽  
Aqueous Mixtures ◽  
Alkyltrimethylammonium Bromides ◽  
Aqueous Polymer ◽  
Surfactant Interactions ◽  
Polymer Surfactant ◽  
Polymer Interaction

The apparent molar volumes and heat capacities of aqueous mixtures of neutral polymers and ionic surfactants were measured at 25 °C. The polymers chosen were poly(vinylpyrrolidone) (PVP) and poly(ethyleneoxide) (PEO) and the surfactants were the C8, C10, and C12 homologs of sodium alkylsulfates and the C10, C12, and C16 homologs of alkyltrimethylammonium bromides. The polymer–surfactant interactions depend on the nature of both components and on the chain length of the surfactant. The thermodynamic properties of the cationic surfactants are essentially the same in the absence and presence of polymer indicating little surfactant–polymer interaction. On the other hand, the thermodynamic properties of anionic surfactants are shifted, upon the addition of polymers, in the direction of enhanced hydrophobic association. The effect increases with the surfactant chain length and with the polymer concentration. The effect is larger with PVP than with PEO.

The adsorption of aliphatic alcohols by montmorillonite and kaolinite

Clay Minerals ◽  
1969 ◽  
Vol 8 (2) ◽  
pp. 213-227 ◽  
Author(s):  
W. L. German ◽  
D. A. Harding
Keyword(s):  
Aqueous Solution ◽  
Chain Length ◽  
Adsorption Isotherms ◽  
Calcium Ions ◽  
Homologous Series ◽  
Aliphatic Alcohols ◽  
Exchangeable Cation ◽  
Significant Extent ◽  
Mineral Aggregates

Adsorption isotherms for an homologous series of primary aliphatic alcohols from aqueous solution by montmorillonite and kaolinite saturated with either sodium or calcium ions have been determined. The results show that adsorption is a function of chain length and exchangeable cation in the case of the more insoluble alcohols. Exchangeable cation does not affect the adsorption of the soluble alcohols to any significant extent. Adsorption of the longer chain alcohols occurs in voids in the mineral aggregates.

Odd/Even Effect in the Chain Length on the Enthalpy of Micellization of Gemini Surfactants in Aqueous Solution

Langmuir ◽  
2005 ◽  
Vol 21 (15) ◽  
pp. 6703-6706 ◽  
Author(s):  
Yajuan Li ◽  
Peixun Li ◽  
Jinben Wang ◽  
Yilin Wang ◽  
Haike Yan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chain Length ◽  
Gemini Surfactants ◽  
Enthalpy Of Micellization
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