Paper Number
IR2
Session
Interfacial Rheology
Title
Effect of interfacial properties on polymerized high internal phase emulsions
Presentation Date and Time
October 23, 2019 (Wednesday) 1:55
Track / Room
Track 7 / Room 306C
Authors
- Zhou, Muchu (New Mexico State University, Department of Chemical and Materials Engineering)
- Foudazi, Reza (New Mexico State University, Department of Chemical and Materials Engineering)
Author and Affiliation Lines
Muchu Zhou and Reza Foudazi
Department of Chemical and Materials Engineering, New Mexico State University, Las Cruces, NM 88003
Speaker / Presenter
Zhou, Muchu
Text of Abstract
High internal phase emulsions (HIPEs) are formed when the volume fraction of the disperse phase exceeds 74%. Polymerized high internal phase emulsions (polyHIPEs) are porous polymers produced through the polymerization of monomers incorporated in the continuous phase of HIPEs. The polyHIPEs have been used as scaffolds, adsorbents, ion-exchange resins, and separation media due to their high porosity and interconnectivity, and low density. The properties of polyHIPEs significantly depend on the properties of the base emulsions, such as composition, stability, droplet size, and especially interfacial properties. The use of surfactants in the polyHIPE formulation is to decrease the interfacial tension and enhance the stability of the HIPEs. The stability of emulsions is related to the viscoelastic properties of the interface in addition to the interfacial tension. Nevertheless, the effect of interfacial properties on the formation of polyHIPEs has not been well understood. In the present work, different surfactant systems are employed to prepare polyHIPEs with different properties. The interfacial rheology of different surfactant systems at the interface of the aqueous and oil phases is investigated to evaluate its effect on the stability of HIPEs and morphology of final polyHIPEs.