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    Processable high internal phase Pickering emulsions using depletion attraction

    Year: 2017

    Journal: Nat. Commun., Volume 8, FEB 1

    Authors: Kim, KyuHan; Kim, Subeen; Ryu, Jiheun; Jeon, Jiyoon; Jang, Se Gyu; Kim, Hyunjun; Gweon, Dae-Gab; Im, Won Bin; Han, Yosep; Kim, Hyunjung; Choi, Siyoung Q.

    Organizations: Basic Science Research Program throuth the National Research Foundation of Korea [NRF-2012R1A6A3A040395, NRF- 2013R1A1A2057708]; high risk and high return program (HRHRP) in KAIST; BK21 Plus Program - Ministry of Education (MOE, Korea); Ministry of Science, ICT and Future Planning (MSIP) through the National Research Foundation of Korea [NRF-2014R1A2A1A10050330]

    High internal phase emulsions have been widely used as templates for various porous materials, but special strategies are required to form, in particular, particle-covered ones that have been more difficult to obtain. Here, we report a versatile strategy to produce a stable high internal phase Pickering emulsion by exploiting a depletion interaction between an emulsion droplet and a particle using water-soluble polymers as a depletant. This attractive interaction facilitating the adsorption of particles onto the droplet interface and simultaneously suppressing desorption once adsorbed. This technique can be universally applied to nearly any kind of particle to stabilize an interface with the help of various non-or weakly adsorbing polymers as a depletant, which can be solidified to provide porous materials for many applications.
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