Novel High Internal Phase Pickering Emulsions Stabilized by Metal-Phenolic Networks-Modified Multicomponent Complex Particles: Interfacial Adsorption Behavior and Stabilization Mechanism

Abstract

In this study, TA-Fe3+ was used to improve the emulsifying properties of CP-PE for stabilizing HIPPEs. The results showed that TA-Fe3+ was able to form a network coating on the surface of CP-PE, increasing its particle size and net surface charge, changing its spatial conformation, and improving its interface properties. TA-Fe3+ contributed to the formation of a more viscoelastic interfacial layer and promoted further interfacial cross-linking at the oil-water interface, improving the interfacial stability of HIPPEs. TA-Fe3+-CP-PE was interconnected at the interface to form a finer network architecture and well-developed interfacial layer, inhibiting coalescence between oil droplets. TA:Fe3+ ratios became a key factor affecting its modification performance by influencing the formation of TA-Fe3+. Importantly, 2TA-1Fe3+-CP-PE-stabilized HIPPEs exhibited favorable stability and desirable viscoelasticity due to superior interfacial adsorption behavior and proper wettability. Our work shed some light on the application of MPNs modifications to the emulsifying properties of multicomponent complex particles.

Keywords: Multicomponent complex particles, Interface properties, Metal-phenolic networks, High internal phase Pickering emulsion, stability