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Synthesis of Monodisperse Bi‐Compartmentalized Amphiphilic Janus Microparticles for Tailored Assembly at the Oil–Water Interface
Author(s) -
Kim Jeong Won,
Cho Jangwoo,
Cho Jaehong,
Park Bum Jun,
Kim YongJin,
Choi KyungHo,
Kim Jin Woong
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201600209
Subject(s) - pickering emulsion , janus particles , acrylate , materials science , janus , polystyrene , monomer , chemical engineering , dispersity , emulsion , miscibility , particle (ecology) , amphiphile , nanotechnology , polymer chemistry , phase (matter) , nanoparticle , chemistry , copolymer , polymer , organic chemistry , composite material , oceanography , geology , engineering
Janus particles endowed with controlled anisotropies represent promising building blocks and assembly materials because of their asymmetric functionalities. Herein, we show that using the seeded monomer swelling and polymerization technique allows us to obtain bi‐compartmentalized Janus microparticles that are generated depending on the phase miscibility of the poly (alkyl acrylate) chains against the polystyrene seed, thus minimizing the interfacial free energy. When tetradecyl acrylate is used, complete compartmentalization into two distinct bulbs can be achieved, while tuning the relative dimension ratio of compartmented bulb against the whole particle. Finally, we have demonstrated that selectively patching the silica nanoparticles onto one of the bulb surfaces gives amphiphilicity to the particles that can assemble at the oil–water interface with a designated level of adhesion, thus leading to development of a highly stable Pickering emulsion system.