Estimation of degree of counterion binding and thermodynamic parameters of ionic surfactants from cloud point measurements by using triblock polymer as probe

2005 ◽  
Vol 287 (2) ◽  
pp. 704-711 ◽  
Author(s):  
Mandeep Singh Bakshi ◽  
Jasmeet Singh ◽  
Jagnandan Kaur
Keyword(s):  
Thermodynamic Parameters ◽  
Cloud Point ◽  
Ionic Surfactants ◽  
Counterion Binding ◽  
Triblock Polymer

scholarly journals Effect of Molecular Composition of Head Group and Temperature on Micellar Properties of Ionic Surfactants with C12 Alkyl Chain

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 651 ◽  
Author(s):  
Jarmila Oremusová ◽  
Zuzana Vitková ◽  
Anton Vitko ◽  
Marián Tárník ◽  
Eva Miklovičová ◽  
...  
Keyword(s):  
Thermodynamic Parameters ◽  
Dosage Forms ◽  
Sodium Sulphate ◽  
Ionic Surfactants ◽  
Head Group ◽  
Optimal Dosage ◽  
Trimethylammonium Chloride ◽  
Counterion Binding ◽  
Micellar Properties ◽  
The Impact

The paper analyses influences of the temperature and hydrophilic groups on micellar properties of ionic surfactants with 12-carbonic hydrophobic chains. The aim is to assess the impact of hydrophilic groups and temperature on thermodynamic parameters and micellization. This knowledge is indispensable for the formulation of new dosage forms. The method uses conductometric measurements. The following hydrophilic groups are analyzed: trimethylammonium bromide, trimethylammonium chloride, ethyldimethylammonium bromide, didodecyldimethylammonium bromide, pyridinium chloride, benzyldimethyl-ammonium chloride, methylephedrinium bromide, cis and trans-[(2-benzyloxy)-cyclohexyl-methyl]-N, N-dimethylammonium bromide, sodium sulphate and lithium sulphate. Except for a few cases, there is a good agreement between values of critical micellar concentrations (CMC) and critical vesicle concentration (CVC) obtained here and those which were obtained by other authors and/or by other physicochemical methods. Values of the CMC are compared with respect to the molar masses of hydrophilic groups. It was found that CMC values increased non-linearly with increasing system temperature. The degrees of counterion binding and thermodynamic parameters, like the standard molar Gibbs energy, enthalpy and entropy of micellization are determined and discussed in detail. The results obtained will be incorporated into in silico processes of modeling and design of optimal dosage forms, a current interdisciplinary research focus of the team.

Thermodynamic Parameters of Anionic Surfactant−Additive Systems at the Cloud Point

2010 ◽  
Vol 55 (11) ◽  
pp. 5055-5058 ◽  
Author(s):  
Tanweer Ahmad ◽  
Arniza Ghazali ◽  
Othman Sulaiman ◽  
Rokiah Hashim ◽  
Ziya A. Khan ◽  
...  
Keyword(s):  
Thermodynamic Parameters ◽  
Cloud Point ◽  
Anionic Surfactant ◽  
Surfactant Additive
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