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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents

ID: 28349.0, MPI für Polymerforschung / MPI Polymerforschung
Mechanical properties of polyelectrolyte microcapsules filled with a neutral polymer
Authors:Lulevich, V. V.; Radtchenko, I. L.; Sukhorukov, G. B.; Vinogradova, Olga I.
Date of Publication (YYYY-MM-DD):2003-04-22
Title of Journal:Macromolecules
Journal Abbrev.:Macromolecules
Issue / Number:8
Start Page:2832
End Page:2837
Review Status:not specified
Audience:Not Specified
Abstract / Description:We study the deformation of "filled" (with a neutral polymer) polyelectrolyte microcapsules under applied load using an atomic force microscope (A-FM)-related force-measuring device. The experimental setup allows combining dynamic force measurements with high-resolution optics. The "filled" capsules are prepared from "hollow" ones (water inside) by changes in their permeability for a high molecular weight polymer by adding organic solvent. At low applied load, capsule deformation was found to be elastic, reversible, and independent of the concentration of the inner polymer, being entirely controlled by the shell properties. Above a certain load capsules deform substantially and partly irreversibly. They start to show variability in the behavior and dependence of their deformation profiles on the driving speed and concentration of the inner polymer solution, which is likely due to the enhanced permeability of the stretched shell. The "filled" capsules were found to be always several times softer than the preformed "hollow" ones, which is shown to be a consequence of the treatment of the shell by organic solvent.
Comment of the Author/Creator:Date: 2003, APR 22
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Russian Acad Sci, Inst Phys Chem, Lab Phys Chem Modified Surfaces, Moscow 117915, Russia; Max Planck Inst Colloid & Interface Res, D-14424 Potsdam, Germany
Identifiers:ISI:000182361700040 [ID No:1]
ISSN:0024-9297 [ID No:2]
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