Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 385, Issue 1-3, Pages 166-170Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2011.06.007
Keywords
Polymeric flocculants; Cationic polyelectrolytes; Blends of flocculants; Microemulsion polymerization
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Funding
- Diputacion Foral de Gipuzkoa
- Gobierno Vasco [GIC 10/17-IT-373-10]
- Ministerio de Educacion y Ciencia (MEC) [CTQ 2006-03412]
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The efficiency of blends of short and long chain cationic polyelectrolytes in the flocculation of water-borne colloidal silica dispersions was investigated. The polyelectrolytes were synthesized by inverse microemulsion copolymerization of acrylamide and [2-(acryloyloxy)ethyl]-trimethylammonium chloride. It was found that short and long chains provided complementary properties in terms of clarity of the supernatant, sedimentation rate and compactness of the sediment. The optimum balance was achieved with blends containing 20-30 wt% of short chains. (C) 2011 Elsevier B.V. All rights reserved.
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