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A Facile Synthesis of Dynamic, Shape‐Changing Polymer Particles
Author(s) -
Klinger Daniel,
Wang Cynthia X.,
Connal Luke A.,
Audus Debra J.,
Jang Se Gyu,
Kraemer Stephan,
Killops Kato L.,
Fredrickson Glenn H.,
Kramer Edward J.,
Hawker Craig J.
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201400183
Subject(s) - copolymer , polystyrene , materials science , polymer , swelling , axial symmetry , chemical engineering , nanoparticle , phase (matter) , polymer chemistry , nanotechnology , chemistry , composite material , organic chemistry , structural engineering , engineering
We herein report a new facile strategy to ellipsoidal block copolymer nanoparticles that exhibit a pH‐triggered anistropic swelling profile. In a first step, elongated particles with an axially stacked lamellae structure are selectively prepared by utilizing functional surfactants to control the phase separation of symmetric polystyrene‐ b ‐poly(2‐vinylpyridine) (PS‐ b ‐P2VP) in dispersed droplets. In a second step, the dynamic shape change is realized by cross‐linking the P2VP domains, thereby connecting glassy PS discs with pH‐sensitive hydrogel actuators.