Paper Number
FE12 

Session
Foams, Emulsions, Surfactants, and Micelles

Title
Drainage kinetics of sodium caseinate foam films

Presentation Date and Time
October 11, 2021 (Monday) 4:35

Track / Room
Track 3 / Meeting Room A-B

Authors (Click on name to view author profile)

  1. Hassan, Lena (University of Illinois)
  2. Xu, Chenxian (UIC, Chemical Engineering)
  3. Boehm, Michael (Motif FoodWorks, Inc.)
  4. Baier, Stefan (Motif FoodWorks, Inc.)
  5. Sharma, Vivek (University of Illinois at Chicago, Chemical Engineering)

Author and Affiliation Lines (in printed abstract book)
Lena Hassan1, Chenxian Xu1, Michael Boehm2, Stefan Baier2 and Vivek Sharma1
1Chemical Engineering, University of Illinois at Chicago, Chicago, IL 60607; 2Motif FoodWorks, Inc., Boston, MA

Speaker / Presenter 
Hassan, Lena

Keywords
experimental methods; theoretical methods; computational methods; biological materials; colloids; flow-induced instabilities; foams; micelles; surfactants; suspensions

Text of Abstract
Many food,cosmetic and pharmaceutical foams contain proteins that influence both the interfacial and bulk properties of formulations. In this study, we characterize the drainage of protein-based foams as well as single foam films, and contrast their behavior with micellar foams formed with small molecular surfactants above the critical micelle concentration. Micellar foam films undergo drainage via stratification manifested as step-wise thinning in the plots of average film thickness over time. Stratification in micellar foam films is accompanied by formation of coexisting thick-thin regions visualized in reflected light microscopy as exhibiting distinct grey regions as intensity is correlated with thin film interference. We critically examine the drainage of protein foam films to determine how and when stratification can be observed, and evaluate the connection between drainage of single foam films and bulk foams.