Paper Number
EF17 

Session
Emulsions, Foams, and Interfacial Rheology

Title
Visualization of interfacial particle contact angle distributions

Presentation Date and Time
October 10, 2017 (Tuesday) 11:05

Track / Room
Track 3 / Crystal C

Authors (Click on name to view author profile)

1. Islam, Md. Anisul (Texas Tech University, Mechanical Engineering)
2. Christopher, Gordon F. (Texas Tech, Mechanical Engineering)
3. Snoeyink, Craig (Texas Tech University, Mechanical Engineering)

Author and Affiliation Lines (in printed abstract book)
Md. Anisul Islam, Gordon F. Christopher, and Craig Snoeyink
Mechanical Engineering, Texas Tech University, Lubbock, TX 79409

Speaker / Presenter 
Snoeyink, Craig

Text of Abstract
The properties of Pickering Emulsions or particle stabilized droplets are highly dependent upon the three-phase contact angle of the particles. In addition it has recently become clear that the contact angle is not a monolithic value for the population of interfacial particles an instead takes on a rather large distribution of values. To improve our understanding of the physical behavior of these interfaces will require a better understanding of how this distribution varies in response to surface coverage, particle-particle interactions, and even particle shape. We will present a new method for measuring the three-phase contact angles of statistically robust populations of interfacial particles. This method uses Bessel Beam Microscopy to localize fluorescent particles in three dimensions and is capable of observing even very dense surface coverages and determining both the mean contact angle and orientation of ellipsoidal interfacial particles.