Bijels formed by direct mixing

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review

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  • Author: Cai, Dongyu

    University of Edinburgh, United Kingdom

  • Author: Clegg , Paul S.

    University of Edinburgh, United Kingdom

  • Author: Li, Tao

    Chinese Academy of Sciences, China

  • Author: Rumble, Katherine A.

    University of Edinburgh, United Kingdom

  • Author: Tavacoli, Joe

    University of Edinburgh

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By combining interfacial nanoparticles and molecular surfactants together with immiscible liquids of high viscosity, we develop an alternative strategy for creating bicontinuous interfacially jammed emulsion gels (bijels). These bijels are prepared from common ingredients which are widely used in industry: glycerol, silicone oil, silica nanoparticles together with cetyltrimethylammonium bromide (CTAB) surfactant. We tune the sample composition and develop a multi-step mixing protocol to achieve a tortuous arrangement of liquid domains. We show that the nanoparticle location changes from one of the phases to the interface during mixing. The changes in both the microscopic and macroscopic sample configuration after a waiting time of months were assessed. In order for the structure to have long-term stability we find that the densities of the two phases must be similar which we achieved by filling one of the phases with nanoparticle-stabilised droplets of the other. This work paves the way to the production of bijels using fully immiscible liquids and hence their exploitation in many application areas.
Original languageEnglish
JournalSoft Matter
Issue number28
Pages (from-to)4824-4829
Publication statusPublished - 2017
Externally publishedYes
CitationsWeb of Science® Times Cited: No match on DOI

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