Effect of charge balance and dosage of polyelectrolyte complexes on the shear resistance of mineral floc strength and reversibility

[Display omitted] We evaluated the effect of polyelectrolyte complexes (PEC) with varying balance of charges on the flocculation of precipitated calcium carbonate (PCC) particles. PECs composed of polyacrylamides carrying opposite charges (A-PAM and C-PAM) were investigated in terms of PCC floc shea...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2015-06, Vol.448, p.73-78
Main Authors: Korhonen, Markus H.J., Rojas, Orlando J., Laine, Janne
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Calcium Carbonate - chemistry
Chemical Precipitation
Electrolytes - chemistry
Flocculation
Polyelectrolyte complex
Precipitated calcium carbonate
Reversibility
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] We evaluated the effect of polyelectrolyte complexes (PEC) with varying balance of charges on the flocculation of precipitated calcium carbonate (PCC) particles. PECs composed of polyacrylamides carrying opposite charges (A-PAM and C-PAM) were investigated in terms of PCC floc shear resistance and re-flocculation effects. Light transmission was used in real time to monitor the dynamics of flocculation under shear fields. Compared to the single polyelectrolytes, PECs greatly enhanced particle re-flocculation while minor differences in shear resistance were observed. Shear resistance and re-flocculation depended strongly on the molecular weight and charge ratio of the PEC components. In order to achieve floc stability and re-flocculation conditions a minimum concentration of charge-asymmetric PEC should be applied.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2015.01.075