Comparison of two cationic polymeric flocculant architectures on the destabilization of negatively charged latex suspensions

Palomino, Daniel; Hunkeler, David; Stoll, Serge

doi:10.1016/j.polymer.2010.12.033

Scientific article

English

Comparison of two cationic polymeric flocculant architectures on the destabilization of negatively charged latex suspensions

Contributors

Palomino, Daniel; Hunkeler, David; Stoll, Serge

Published in

Polymer, vol. 52, no. 4, p. 1019-1026

Publication date

2011

Abstract

Flocculation studies between cationic polymers and oppositely charged colloidal particles are reported in which both flocculation kinetics and floc structures are systematically investigated. The flocculation rate constant, stability ratio and kinetics laws are experimentally determined using particle counting for two polymer architectures; a cationic linear polymer and a two-branched polymer. Comparisons are also made using NaCl at different ionic concentrations for the destabilization of the colloidal particles. Detailed measurements of electrophoretic mobility and kinetics rate constants on varying the polymer dosage are reported. Results suggest that the polymer architecture plays important roles on the polymer dosage for the rapid destabilization of the colloidal suspension. The branched polymer at optimal dosage exhibits the highest flocculation rate constant, whereas on the other hand, the linear polymer concentration range of flocculation is larger. In both cases, polymer flocculation is more efficient by a factor of 5–6 than charge screening effects due to the presence of salt. Analysis of the stability ratio indicates that tele-bridging flocculation and electrostatic forces dictate the stability of the charged latex particle suspension. It is shown that the fractal concepts which are valid for aggregation processes are also applicable here and branched polymers as well as linear polymers yield to the formation of compact flocs in comparison to those obtained with salt.

Keywords

Linear and branched polyelectrolytes
Kinetics flocculation rate constants
Floc fractal dimensions

UNIGE affiliation entities

Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

UNIGE research groups

Citation (ISO format)

PALOMINO, Daniel, HUNKELER, David, STOLL, Serge. Comparison of two cationic polymeric flocculant architectures on the destabilization of negatively charged latex suspensions. In: Polymer, 2011, vol. 52, n° 4, p. 1019–1026. doi: 10.1016/j.polymer.2010.12.033

Article (Published version)

Identifiers

PID : unige:18210
DOI : 10.1016/j.polymer.2010.12.033

Additional URL for this publication

http://linkinghub.elsevier.com/retrieve/pii/S0032386110011018

Journal ISSN

0032-3861

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26/01/2012 17:22:00

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26/01/2012 17:22:00

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14/03/2023 17:07:28

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29/10/2024 18:53:59

Comparison of two cationic polymeric flocculant architectures on the destabilization of negatively charged latex suspensions

Contributors

Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

UNIGE research groups

Citation (ISO format)

Main files (1)

Identifiers

Additional URL for this publication

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation