How to stabilize your emulsion with colloid surfactants

How to stabilize your emulsion with colloid surfactants

13 Jun 2018, 10:30 - 11:15

Marketing Trends & Regulations Theatre
Language:
Korean

This talk introduces a straightforward technique that can structurally stabilize emulsions with colloidal surfactants.

When colloidal particles are allowed to have anisotropies in shape and chemistry, they self-assemble to form an ordered colloidal structure with a well-defined configuration. For this, we have synthesized a series of uniform anisotropic colloidal particles. Fine-tuning of their shapes in micrometer length scales is achieved by precisely manipulating the phase separations between bulbs in the process of the seeded polymerization.

By using these anisotropic colloidal particles, we have shown that they can more jam and pack in a given space, which leads to exquisite suspension rheology behaviors. Chemical anisotropy can be achieved by selectively treating their surface, thus imparting amphiphilicity to them.

This study has demonstrated the feasibility of arraying the anisotropic particles at interfaces. Actually, we have directly visualized the packing of anisotropic particles at the water-in-oil interface, indicating they behave just like a surfactant molecule.

This shows well that fine control over the geometry of colloidal particles, thus creating anisotropic properties, allows us to fabricate a new type of building blocks that are essential for structural stabilization of emulsions. 

 

References

1.J. W. Kim, J. Cho, J. Cho, B. J. Park, Y. J. Kim, K. H. Choi, and J. W. Kim, Angew. Chem. Int. Ed. 55 4509 (2016)
2.H. Kim, J. Cho, J. Cho, B. J. Park, J. W. Kim, ACS Appl. Mater. Interfaces 10 1408 (2018)

Contributors

  • Jin Woong Kim

    Speaker

    Professor - Dept. of Chemical and Molecular Engineering and Dept. of Bionano Technology

    Hanyang University

    Prof. Jin Woong Kim got his bachelor degree in 1994, master degree in 1996, and Ph. D in 2000 from Industrial Chemistry at Hanyang University. Then...

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