Journal
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 154, Issue -, Pages 86-100Publisher
ELSEVIER
DOI: 10.1016/j.cherd.2019.11.037
Keywords
Copolymer dispersant; Dispersion; Colloids; Pigment; Population balance model
Categories
Funding
- Major Scientific and Technological Projects of Guangdong Province, China [2015B090927002]
- Fundamental Research Funds for the Central Universities [2015ZM102]
- Major Scientific and Technological Projects of Foshan, China [2016AG101415]
- China Postdoctoral Science Foundation [2017M622685]
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Water-based copolymer dispersants, i.e., sodium polyacrylic acid-co-2-acrylamide-2-methylpropanesulfonic acid-co-glycerol monomethacrylate (PASGs), were synthesized for dispersion of praseodymium-doped zirconium silicate pigment in aqueous suspension with polyacrylic acid-co-2-acrylamido-2-methylpropanesulfonic acid (PAS). Effects of different parameters on the dispersion behavior of colloidal particles were investigated via sedimentation tests. The samples were characterized by particle size analysis, Fourier transform infrared spectroscopy, and electrokinetic potential measurement. The interparticle potential energy at different pH values and dispersant types was calculated. The results show that PASG(1) at 3 wt.% addition effectively disperses the colloidal particles in the denser suspension of 35 wt.% at pH 7.0, compared to PAS. Dispersant PASG(1) provides greater steric hindrance and electrostatic repulsive energies than dispersant PAS. The dispersion/aggregation behavior of colloidal particles in the suspension under different conditions was also predicted by a modified population balance model (PBM). The predicted data are similar to the experimental results. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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