Introduction to Zeta Potential Course - Basics, Dispersion Aggregation, Electrophoresis, Stability Evaluation
S11238
Why do dispersed systems aggregate? DLVO theory! The stability of fine particle dispersions! An introductory course that significantly enhances your understanding of the seemingly complex "zeta potential."
Lecturer Professor Hiroyuki Oshima, Faculty of Pharmaceutical Sciences, Tokyo University of Science [Brief Biography] Theory of Colloid and Interfacial Electric Phenomena, Elsevier, 2006. Biophysical Chemistry of Biointerfaces, Wiley, 2010. Target Audience: Researchers, engineers, development departments, and technical management departments interested in zeta potential. Venue: Kawasaki City Educational and Cultural Center, 4th Floor, Room 3 [Kanagawa, Kawasaki] 10-15 minutes walk from JR Kawasaki Station, 10-15 minutes walk from Keikyu Kawasaki Station. Date and Time: December 9, 2011 (Friday) 10:30 AM - 4:00 PM Capacity: 30 people *Registration will close once full. Please apply early. Participation Fee: [Early Bird Discount Price] 46,200 yen (tax included, including text costs) for 2 participants from 1 company. *Limited to Tech-Zone members who apply by November 30. Membership registration is free. *After November 30, the [Regular Price] will be 49,350 yen (tax included, including text costs) for 2 participants from 1 company.
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basic information
**Lecture Summary** Zeta potential is a factor that promotes the dispersion of fine particle systems. Zeta potential is a quantity calculated using a suitable theory based on the electrophoretic mobility of the particles, and it is not a directly measurable quantity. This is what makes zeta potential challenging. In this seminar, we will explain zeta potential in an easy-to-understand manner from the basics. Once you understand zeta potential, you will be able to quantitatively discuss the stability of fine particle dispersion systems based on DLVO theory.
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P2
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P2
Applications/Examples of results
**Program** 1. Why do dispersed systems aggregate? 1-1 Intermolecular forces and interparticle forces 1-2 Aggregation promoting factors - Hamaker constant 2. Diffuse electric double layer around fine particles 2-1 Thickness of the electric double layer 2-2 Charge and potential of fine particles 3. Electrophoresis of solid particles and zeta potential 3-1 Zeta potential - dispersion promoting factor 3-2 Smoluchowski's equation and Hückel's equation 3-3 Henry's equation 3-4 Relaxation effect 4. Electrophoresis of soft particles 4-1 Differences from solid particles 4-2 Polymer electrolytes 4-3 Charge density and softness parameters 5. Evaluation of stability in dispersed systems - DLVO theory 5-1 Electrostatic forces between fine particles 5-2 How to draw potential curves 5-3 DLVO theory and Shultze-Hardy empirical rule 5-4 Energy barriers and aggregation probability
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