One-step microfluidic synthesis of Janus microhydrogels with anisotropic thermo-responsive behavior and
Kyoung Duck Seo1, Junsang Doh, Dong Sung Kim
1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk 790-784, South Korea.
Abstract:
We report one-step microfluidic synthesis and characterization of novel Janus microhydrogels composed entirely of the same base material, N-isopropylacrylamide (NIPAAm). The microhydrogels were fabricated by the microfluidic generation of Janus monomer microdroplets based on separation of a supersaturated aqueous NIPAAm solution into NIPAAm-rich and -poor phases followed by UV irradiation. The resulting Janus microhydrogels exhibited tunable anisotropic thermo-responsive behavior and organophilic/hydrophilic loading capability.
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