Shear-induced orientation of a rigid surfactant mesophase

An optically clear, crystalline, gel-like mesophase is formed by the addition of water to a micellar solution consisting of a mixture of 0.85 M anionic surfactant sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and a 0.42 M zwitterionic surfactant phosphatidylcholine (lecithin) in isooctane. At 25 deg...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 20(2004), 14 vom: 06. Juli, Seite 5693-702
1. Verfasser: Singh, Mohit (VerfasserIn)
Weitere Verfasser: Agarwal, Vivek, De Kee, Daniel, McPherson, Gary, John, Vijay, Bose, Arijit
Format: Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a Shear-induced orientation of a rigid surfactant mesophase 
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520 |a An optically clear, crystalline, gel-like mesophase is formed by the addition of water to a micellar solution consisting of a mixture of 0.85 M anionic surfactant sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and a 0.42 M zwitterionic surfactant phosphatidylcholine (lecithin) in isooctane. At 25 degrees C and water to AOT molar ratio of 70, the system has a columnar hexagonal microstructure with randomly oriented domains. The shear-induced orientation and subsequent relaxation of this structure were investigated by rheological characterization and small-angle neutron scattering (SANS). The rheological response implies that the domains align under shear, and remain aligned for several hours after cessation of shear. Shear-SANS confirms this picture. The sheared gel mesophase retains its alignment as the temperature is increased to 57 degrees C, indicating the potential to conduct templated polymer and polymer-ceramic composite materials synthesis in aligned systems 
650 4 |a Journal Article 
700 1 |a Agarwal, Vivek  |e verfasserin  |4 aut 
700 1 |a De Kee, Daniel  |e verfasserin  |4 aut 
700 1 |a McPherson, Gary  |e verfasserin  |4 aut 
700 1 |a John, Vijay  |e verfasserin  |4 aut 
700 1 |a Bose, Arijit  |e verfasserin  |4 aut 
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