Nanoparticles based on polyelectrolyte complexes: effect of structure and net charge on the sorption capability for solved organic molecules |
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Authors: | H-M Buchhammer G Petzold K Lunkwitz |
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Institution: | (1) Institute of Polymer Research Dresden e.V., Hohe Strasse 6 01069 Dresden, Germany e-mail: buchhamr@ipfdd.de Tel.: +49-351-4658525 Fax: +49-351-4658284, DE |
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Abstract: | The sorption of solved organic molecules such as p-nitrophenol or dyes on previously formed nanoparticles based on polyelectrolyte/micelle complexes or polycation/polyanion
complexes was studied. It could be shown that the sorption capability strongly depends on the structure and properties of
the complex particles. Investigations have been made with complex particles that differ in their hydrophobic/hydrophilic structure,
size and net charge. Such complex aggregates could be prepared by mixing the cationic surfactant dodecylamido-ethyldimethylbenzylammonium
chloride, the polycations poly(diallyldimethylammonium chloride) or poly(methacryloyloxyethyldimethylbenzylammonium chloride)
and the copolymers of maleic acid with propene or methylstyrene as anionic components. It is found that the sorption capability
increases with increasing molar mass and hydrophobic properties of the components used. In addition, the concentration ratio
c
polym/c
org.poll that was required to reach optimal sorption conditions could be decreased by the use of macromolecules with high molar masses.
The best results were obtained by using cationic stabilized complex particles formed with high-molar-mass polycations as sorbents
for anionic dye molecules.
Received: 10 November 1999 Accepted: 24 February 2000 |
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Keywords: | Polyelectrolyte complexes Nanoparticles Colloidal dispersions Sorption p-Nitrophenol |
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