Specifics of kaolin dispersion flocculation due to a polyelectrolyte complex formation on particle surface

The paper describes the study of flocculation characteristics of kaolin aqueous dispersion in successive introduction of high molecular weight oppositely charged polymers. It was established that flocculation in successive modes of introduction of cationic polyelectrolyte of poly-trimethyloxyethylme...

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Bibliographic Details
Published in:Colloid and polymer science 2020-06, Vol.298 (6), p.519-533
Main Authors: Dryabina, Svetlana S., Rudenko, Maria S., Shulevich, Yulia V., Navrotskii, Alexander V., Novakov, Ivan A.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Complex formation
Flocculation
Food Science
Kaolin
Nanotechnology and Microengineering
Original Contribution
Physical Chemistry
Polyelectrolytes
Polymer Sciences
Sedimentation
Soft and Granular Matter
Sulfonic acid
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Summary:The paper describes the study of flocculation characteristics of kaolin aqueous dispersion in successive introduction of high molecular weight oppositely charged polymers. It was established that flocculation in successive modes of introduction of cationic polyelectrolyte of poly-trimethyloxyethylmethacryloylammonium methyl sulfate (K) and anionic polyelectrolyte poly-2-acrylamido-2-methyl-1-propane sulfonic acid (A) is accompanied by an increase in sedimentation rate and formation of more dense floccules compared with the use of individual polyelectrolytes. The paper discusses the difference in the mechanisms of flocculation in the presence of oppositely charged polymers, including the possibility of forming a polyelectrolyte complex on the surface of colloidal particles.
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-020-04623-6