Results 171 to 180 of about 5,042 (207)

Thermodynamics of micellization of fluorocarbon surfactants

Journal of Colloid and Interface Science, 1980
Abstract The free energy, enthalpy, and entropy of micellization of fluorocarbon surfactants were determined from the surface tension-log concentration curves at various temperatures. Plots of the logarithm of the critical micelle concentration versus 1/ T (where T is the absolute temperature) were not linear, indicating a decrease of enthalpy of ...
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Incorporation of Fluorocarbon in Fluorinated Surfactant Based Liquid Crystals

Langmuir, 2003
The solubilization of a fluorocarbon oil in a nonionic fluorinated surfactant/water system is investigated by small-angle X-ray scattering to understand its role in the phase transitions between li...
Ropers, Marie-Hélène, Stebe, Marie-José   +1 more
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Self-assembly in fluorocarbon surfactant systems

Current Opinion in Colloid & Interface Science, 1998
Significant advances have been attained in the characterization of microstructure and microstructural transitions of surfactant aggregates in terms of shape, dimension, and connectivity, in both micellar and liquid crystalline phases and microemulsion systems.
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Fluorocarbon–hydrocarbon gemini surfactant mixtures in aqueous solution

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2009
Abstract The aqueous solution properties of oppositely charged gemini–gemini surfactant mixtures have been studied with a combination of static surface tension, dynamic light scattering (DLS) and cryogenic transmission electron microscope (cryo-TEM) measurements.
Kenichi Sakai, Megumi Kaji, Yuichiro Takamatsu, Koji Tsuchiya, Kanjiro Torigoe, Kazuyuki Tsubone, Tomokazu Yoshimura, Kunio Esumi, Hideki Sakai, Masahiko Abe   +9 more
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Mixed insoluble monolayers of fluorocarbon and hydrocarbon surfactants

Journal of Colloid and Interface Science, 1991
Abstract The mixed insoluble monolayers of the fluorocarbon surfactants (FSAa) and hydrocarbon surfactants (HSAa) with similar molecular structure (including FSAa-FSAa, HSAa-HSAa, and FSAa-HSAa mixed systems) have been studied. All of them seem ideal, i.e., the π-A curves obey the simple additivity rule.
Lan-Hui Zhang, Guo-Xi Zhao, Bu-Yao Zhu
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Solubilization of pada in Hydrocarbon Fluorocarbon Surfactant Mixtures

Australian Journal of Chemistry, 1992
Solubilities of pyridine-2-azo- p -dimethylaniline ( pada ) were determined at 25ºC in four mixed fluorocarbon/hydrocarbon short-chained surfactant systems: ( i ) sodium decyl sulfate/sodium perfluoroheptanoate; (ii) sodium octanesulfonate /sodium perfluorooctanoate ; (iii) sodium octanesulfonate /sodium perfluoroheptanoate ; (iv) sodium ...
TJ Connolly, VC Reinsborough, XY Xiang
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Interfacial Properties of Aqueous Nonionic Fluorocarbon Surfactant Solutions

Journal of Dispersion Science and Technology, 2007
The equilibrium, dynamic surface tensions, and surface dilatational elasticity of aqueous solutions of nonionic fluorocarbon surfactant are reported. The critical micellar concentration, CMC (0.023 mM) and equilibrium surface tension (24.6 m N . m−1) at CMC were measured by Wilhelmy plate method for aqueous solution of C8F17SO2N(C3H7)(C2H4O)nH (n=20 ...
Suraj Chandra Sharma, Lok Kumar Shrestha, Kenji Aramaki   +2 more
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Hybrid surfactants containing separate hydrocarbon and fluorocarbon chains

The Journal of Physical Chemistry, 1992
This paper discusses how two hybrid surfactants with separate hydro- and fluorocarbon chains attached to the same hydrophilic head group are synthesized and those micellar solutions are analyzed by several methods. Using Kleven`s equation, micellar aggregation number decreases with increasing chain length.
Wen Guo, Zhong Li, B. M. Fung, E. A. O'Rear, J. H. Harwell   +4 more
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Surfactivity of a Series of Nonionic Fluorocarbon Surfactant − Perfluorousnonenyl Polyethylene Glycol Ether

Advanced Materials Research, 2015
The surfactivity of nonionic fluorocarbon surfactants, polyethylene glycol perfluoro-nonyl monoether (C9F17-PEG-n) and diether (C9F17-PEG-n-C9F17), was systematically investigated, including the surface tensions (γ), critical micelle concentration (CMC), cloud point, foaming property and emulsifiability.
Hong Xin Shi, Hao Miao Zhou, Hai Min Shen, Hong Ke Wu   +3 more
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Interaction between cationic fluorocarbon surfactant and polyoxyethylated surfactants having a sulfate group

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 1995
Abstract Interaction between a cationic fluorocarbon surfactant, bis(2-hydroxyethyl)(2-hydroxy-3-perfluorooctylpropyl)-methylammonium chloride (DEFUMAC) and sodium dodecyl poly(oxyethylene)sulfate (SDEnS, n = 3, 5, 8) in dilute aqueous solutions has been investigated by means of surface tension, fluorescence probing, solubilization, and static and ...
Keiichi Nagai, Kunio Esumi
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