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Authors
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Schwarz, S. ; Dragan, S.
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Title
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Nonstoichiometric Interpolyelectrolyte Complexes as Colloidal Dispersions Based on NaPAMPS and Their Interaction with Colloidal Silica Particles
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Date
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14.05.2004
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Number
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12088
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Abstract
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Preparation and characterization of some nonstoichiometric interpolyelectrolyte complexes (NIPECs) as stable colloidal dispersions by the interaction between poly(sodium 2-acrylamido-2-methylpropanesulfonate) (NaPAMPS) and three strong polycations bearing quaternary ammonium salt centres in the backbone, poly(diallyldimethylammonium chloride) (PDADMAC) and two polycations containing N,N-dimethyl-2-hydroxypropyleneammonium chloride units (PCA<SUB>5</SUB> and PCA<SUB>5</SUB>D<SUB>1</SUB>), have been followed in this study as a function of the polycation structure and polyelectrolyte concentration. Complex characteristics were followed by polyelectrolyte titration, turbidity and quasi-ellastic light scattering. Almost monodisperse NIPECs nanoparticles with a good storage stability were prepared when total concentration of polyelectrolyte was varied in the range 0.85-6.35 mmol/L, at a ratio between charges (n<SUP>-</SUP>/n<SUP>+</SUP>) of 0.7. NIPECs as a new kind of flocculants were used to flocculate a stable monodisperse silica suspension. The main advantage of NIPECs as flocculants is the broad flocculation window, which is a very important aspect for industrial applications.
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Publisher
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Macromolecular Symposia
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Wikidata
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Citation
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Macromolecular Symposia 210 (2004) 185-192
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DOI
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https://doi.org/10.1002/masy.200450621
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