Nonideal Mixed Micelles of Fluorinated and Hydrogenous Surfactants in Aqueous Solution. NMR and SANS Studies of Anionic and Nonionic Systems

Langmuir ◽  
2010 ◽  
Vol 26 (8) ◽  
pp. 5355-5363 ◽  
Author(s):  
Mats Almgren ◽  
Vasil M. Garamus ◽  
Lars Nordstierna ◽  
Jean Luc-Blin ◽  
Marie-José Stébé
Keyword(s):  
Aqueous Solution ◽  
Mixed Micelles ◽  
Solution Nmr

Mixed micelles formed by biological surfactant sodium deoxycholate and nonionic surfactants in aqueous solution

2019 ◽  
Vol 41 (3) ◽  
pp. 330-337
Author(s):  
Lin Wang ◽  
Shasha Liu ◽  
Xia Xin ◽  
Xiaorong Cao ◽  
Dong Yuan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nonionic Surfactants ◽  
Mixed Micelles ◽  
Sodium Deoxycholate

Inclusion Complex Formation of Captopril with α‐ and β‐Cyclodextrins in Aqueous Solution: NMR Spectroscopic and Molecular Dynamic Studies

2002 ◽  
Vol 91 (11) ◽  
pp. 2390-2398 ◽  
Author(s):  
Yoichi Ikeda ◽  
Sohko Motoune ◽  
Toshikazu Matsuoka ◽  
Hidetoshi Arima ◽  
Fumitoshi Hirayama ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Inclusion Complex ◽  
Molecular Dynamic ◽  
Solution Nmr ◽  
Inclusion Complex Formation ◽  
Dynamic Studies

Hetero-association of anticancer antibiotics in aqueous solution: NMR and molecular mechanics analysis

2005 ◽  
Vol 117 (2) ◽  
pp. 111-118 ◽  
Author(s):  
D.B. Davies ◽  
M.P. Evstigneev ◽  
D.A. Veselkov ◽  
A.N. Veselkov
Keyword(s):  
Aqueous Solution ◽  
Molecular Mechanics ◽  
Solution Nmr ◽  
Mechanics Analysis ◽  
Anticancer Antibiotics

Thermodynamic Micellization of Cationic-Nonionic Surfactants in Aqueous Solution Using Conductivity and Surface Tension Measurements

2021 ◽  
Vol 19 (4) ◽  
pp. 20-26
Author(s):  
Inaam H. Ali ◽  
Sameer H. Kareem ◽  
Fouad A.A. AL-Saady
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Free Energy ◽  
Critical Micelle Concentration ◽  
Mixed Micelle ◽  
Nonionic Surfactants ◽  
Mixed Micelles ◽  
Tween 20 ◽  
Standard Thermodynamic Functions ◽  
Increasing Temperature

In the current work, we discuss the mixed micelles and thermodynamic micellization of aqueous binary mixture of polyoxyethylene - 20 sorbitan-monododecanoate (Tween 20) as nonionic surfactant and Benzyldimethylhexadecyl ammonium chloride (HDBAC) as cationic surfactant using conductivity and surface tension (γ) estimations in the temperatures range (288 -318K). Critical micelle concentration (CMC) and variables of micellization, like the standard thermodynamic functions: Gibbs free energy (Δ𝐺𝑚 ⁰ ), enthalpyΔ𝐻𝑚 ⁰ ) and entropy (Δ𝑆𝑚 ⁰ ) were calculated using the variation of conductivity and γ with molar concentration and the variation of ln XCMC with temperature. The experimental CMC values were applied to calculate the mole fractions of surfactant in the mixed micelle (𝑋1 𝑚 ), the β parameter and the coefficient of activity f1and f2, using the equations proposed by Clint and Rubingh, which indicate the β parameter, is always negative. In addition, the results of thermodynamic parameters show that ΔG⁰m are negative for both individual and mixture of HDBAC-Tween20 surfactants and the values negatively increased with increasing temperature while its negative values decreasing with decreasing initial mole fraction of HDBAC.

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