Membrane Densification of Heated Polyelectrolyte Multilayer Capsules Characterized by Soft X-ray Microscopy

Authors

  • C. Déjugnat,

    1. Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA Valrhô, centre de Marcoule, BP 17171 Bagnols-sur-Cèze 30207 cedex (France)
    2. Max Planck Institute of Colloids and Interface, Wissenschaftspark Golm, Am Mühlenberg 1, 14424 Potsdam (Germany)
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  • K. Köhler,

    1. Max Planck Institute of Colloids and Interface, Wissenschaftspark Golm, Am Mühlenberg 1, 14424 Potsdam (Germany)
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  • M. Dubois,

    1. Max Planck Institute of Colloids and Interface, Wissenschaftspark Golm, Am Mühlenberg 1, 14424 Potsdam (Germany)
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  • G. B. Sukhorukov,

    1. Department of Materials, Queen Mary University of London, Mile End Road, London, E1 4NS (UK)
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  • H. Möhwald,

    1. Max Planck Institute of Colloids and Interface, Wissenschaftspark Golm, Am Mühlenberg 1, 14424 Potsdam (Germany)
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  • T. Zemb,

    1. Institut de Chimie Séparative de Marcoule (ICSM), UMR 5257, CEA Valrhô, centre de Marcoule, BP 17171 Bagnols-sur-Cèze 30207 cedex (France)
    2. Laboratoire Claude Fréjacques, URA331, CEA Saclay DRECAM/SCM/LCF Bat. 125, Gif-sur-Yvette 91191 cedex (France)
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  • P. Guttmann

    1. Institut für Röntgenphysik, Georg-August-Universität Göttingen c/o BESSY, Albert-Einstein-Strasse 15, 12489 Berlin (Germany)
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  • The authors thank Luc Belloni for useful discussions and the German-French European Network “Complex Fluids: From 3 to 2 Dimensions” for funding. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Soft X-Ray microscopy is used for the quantitative analysis of temperature-sensitive hollow polyelectrolyte microcapsules made of poly(sodium styrene sulfonate) and poly(diallyl dimethyl ammonium chloride) (see figure). Upon heating to 90 °C they shrink and the polymer membrane becomes denser. The analysis of such systems in water shows, at 20 nm resolution, that membrane densification is accompanied by exclusion of about 50% of the hydration water, leading to homogeneously filled dense spheres without any loss of material.

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