2014
DOI: 10.1021/jp411894e
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In Situ X-ray Polymerization: From Swollen Lamellae to Polymer–Surfactant Complexes

Abstract: The influence of the monomer diallyldimethylammonium chloride (D) on the lamellar liquid crystal formed by the anionic surfactant aerosol OT (AOT) and water is investigated, determining the lamellar spacings by SAXS and the quadrupolar splittings by deuterium NMR, as a function of the D or AOT concentrations. The cationic monomer D induces a destabilization of the AOT lamellar structure such that, at a critical concentration higher than 5 wt %, macroscopic phase separation takes place. When the monomer, which … Show more

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Cited by 6 publications
(7 citation statements)
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“…However, the diffusion data (Figure horizontal axis and Table ) reveals that the water of components A–C all have a diffusion rate fairly close to that of pure water (2.3 × 10 –9 m 2 /s), meaning that water is able to move quite freely in at least one direction but is hindered in other directions as seen from the reduced T 2 relaxation times. Hence, two possibilities are tubelike or sheetlike structures, which agree well with the ordered microstructures (surfactant lamellar structures and hexagonal/cubic tubes/cylinders) seen in the literature. Assuming that the direction of the channels between them will predominantly follow the direction of the applied magnetic field gradient ( z direction), which also follows the vertical axis of the sample tube, water will seem to diffuse freely.…”
Section: Resultssupporting
confidence: 81%
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“…However, the diffusion data (Figure horizontal axis and Table ) reveals that the water of components A–C all have a diffusion rate fairly close to that of pure water (2.3 × 10 –9 m 2 /s), meaning that water is able to move quite freely in at least one direction but is hindered in other directions as seen from the reduced T 2 relaxation times. Hence, two possibilities are tubelike or sheetlike structures, which agree well with the ordered microstructures (surfactant lamellar structures and hexagonal/cubic tubes/cylinders) seen in the literature. Assuming that the direction of the channels between them will predominantly follow the direction of the applied magnetic field gradient ( z direction), which also follows the vertical axis of the sample tube, water will seem to diffuse freely.…”
Section: Resultssupporting
confidence: 81%
“…10 Studies where oppositely charged polyelectrolytes are incorporated into lamellar lyotropic systems have shown how the surfactant phase is destabilized when macroscopic phase separation occurs and therby can form a collapsed lamellar structure upon interaction with a polyelectrolyte. 9,11 Similar microstructures are also seen in small compact complexes (size in the nanometer to micrometer range) formed in solution below the surfactant concentration where the precipitate is formed. 12,13 However, structural information beyond such ordered morphologies is necessary for a more complete structural picture of the water-insoluble polyelectrolyte−surfactant complexes.…”
Section: ■ Introductionmentioning
confidence: 71%
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“…Finally, polymerization is induced by X-rays in the absence of a chemical initiator. Additionally, the high photon flux of the synchrotron radiation provides a method to monitor the in situ polymerization, via the changes in the SAXS diffractograms, from the initial mixture to the postpolymerized state. , …”
Section: Introductionmentioning
confidence: 99%