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09:26
Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
Influence of colloidal interactions on pigment coating layer structure formation
Anders Sand1, Martti Toivakka, Tuomo Hjelt
1Laboratory of Paper Coating and Converting, and Center for Functional Materials, Abo Akademi University, Porthaninkatu 3, 20500 Turku, Finland. anders.sand@abo.fi
Journal of Colloid and Interface Science
|January 30, 2009
Summary
Simulating pigment coating consolidation reveals that lower particle surface potential increases coating thickness. Continuous phase viscosity affects consolidation speed but not final microstructure, aiding additive impact understanding.
Area of Science:
- Colloid and Surface Science
- Materials Science
- Chemical Engineering
Background:
- Coating layer consolidation is crucial for material properties.
- Understanding colloidal interactions is key to controlling coating structure.
- Pigment-particle dynamics influence final coating performance.
Purpose of the Study:
- To simulate pigment coating layer consolidation using a 3D particle dynamics model.
- To investigate the impact of colloidal parameters and continuous phase viscosity on coating structure.
- To enhance understanding of how colloidal properties affect coating formation and chemical additive performance.
Main Methods:
- Employed a three-dimensional particle dynamics model incorporating hydrodynamic interactions, colloidal forces, and Brownian motion.
- Simulated polydisperse ground calcium carbonate (GCC) particle systems.
- Varied particle surface potential, electrostatic double layer thickness, and continuous phase viscosity.
Main Results:
- Reduced particle surface potential led to increased coating layer thickness.
- Electrostatic double layer thickness significantly influenced internal coating structure.
- Higher continuous phase viscosity slowed consolidation but did not alter the final microstructure.
Conclusions:
- Colloidal system properties critically influence coating consolidation and structure development.
- Particle surface potential and electrostatic interactions are key drivers of coating thickness and internal arrangement.
- Findings provide insights into optimizing chemical additives for tailored coating layer formation.
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