EXPERIMENTAL AND MODELING STUDIES OF COLLOIDAL SUSPENSION STABILITY OF HIGH-DENSITY PARTICLES IN AQUEOUS SOLUTIONS

Agglomeration and sedimentation of suspended colloidal particles occur in many natural phenomena, in consumer products, and in engineering applications. Stabilized colloidal pigment dispersions were used in ancient Egypt and in ancient France thousands of years ago. Present day applications include the manufacturing of paints and coatings, enhanced oil recovery, waste-water treatment, pharmaceutical dispersions, biotechnology, and inkjet printing. The most common problem in colloidal science is how to stabilize suspended colloidal particles against agglomeration by controlling their interparticle forces. If the particles agglomerate, the sizes of the resulting agglomerated particles increase, increasing the sedimentation (or creaming) rate, and the suspensions can become unstable. In certain coating processes, preventing the agglomeration of dispersed particles is less important, since the particles may agglomerate after the coating is applied and dried. By contrast, strategies for preventing sedimentation, whether or not agglomeration occurs, are particularly important for suspensions containing high-density particles. For such suspensions, few fundamental studies are available in the literature, even though their uses are widespread. This thesis focuses principally, for the first time in

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemical Engineering

Year

2016

Author dc:creator

• YANG, YUNG-JIH

Contributors dc:contributor

• Elias I Franses
• David S Corti
• You-Yeon Won
• Carlos Martinez

• agglomeration
• colloidal dispersion
• high-density particle
• sedimentation
• stability

Repository record dc:identifier

https://docs.lib.purdue.edu/open_access_dissertations/1235

OAI identifier oai:identifier

oai:docs.lib.purdue.edu:open_access_dissertations-2451