Bijels formed by mixing: Escaping from phase separating liquids
July 22-25, 2018
The liquid-liquid phase separation of binary fluids, induced by a temperature quench, can be arrested by colloidal particles trapped at the interface. The arrested structure, a novel soft solid known as a bicontinuous interfacially-jammed emulsion gel (bijel), is a variant of a Pickering emulsion . The mechanical properties are controlled by the interfacial tension between the two fluid domains (e.g. a deeper quench yields a stronger bijel) and the volume fraction of particles. Similar structures have also been created using the biopolymer phase separation (e.g. of gelatin and starch) and also using phase separation driven by the transfer of a solvent out of a pre-mix .
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Paul Clegg, "Bijels formed by mixing: Escaping from phase separating liquids" in "Advances in Cosmetic Formulation Design", ECI Symposium Series, (2018). https://dc.engconfintl.org/cosmetic/44