In Situ X-ray Polymerization: From Swollen Lamellae to Polymer–Surfactant Complexes

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• 作者：Yahya Agzenai ; Bj?rn Lindman ; Viveka Alfredsson ; Daniel Topgaard ; Carmen S. Renamayor ; Isabel E. Pacios
• 刊名：Journal of Physical Chemistry B
• 出版年：2014
• 出版时间：January 30, 2014
• 年：2014
• 卷：118
• 期：4
• 页码：1159-1167
• 全文大小：420K
• ISSN：1520-5207

文摘

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 is dissolved in the AOT lamellae, is polymerized in situ by X-ray initiation, a new collapsed lamellar phase appears, corresponding to the complexation of the surfactant with the resulting polymer. A theoretical model is employed to analyze the variation of the interactions between the AOT bilayers and the stability of the lamellar structure.