4. How do biopolymers stabilise emulsions?
Biopolymer molecules, in general, do not possess the amphiphilic structure of conventional surfactants. Even so, as they possess pronounced hydrophobic properties, they will adsorb at the oil/water interface, building up a condensed interfacial film. The viscoelastic (mechanical) properties of this adsorbed layer provide good stability against coalescence.
Our lignin-based products stabilise the emulsion through three combined mechanisms:
- Introduction of an electrokinetic charge at the o/w interface
- Formation of a semi-rigid film at the interface
- Steric interactions