A Facile Synthesis of Dynamic,Shape‐Changing Polymer Particles |
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| Authors: | Dr. Daniel Klinger Cynthia X. Wang Dr. Luke A. Connal Debra J. Audus Dr. Se Gyu Jang Dr. Stephan Kraemer Dr. Kato L. Killops Prof. Glenn H. Fredrickson Prof. Edward J. Kramer Prof. Craig J. Hawker |
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| Affiliation: | 1. Materials Research Laboratory, University of California, Santa Barbara, CA 93106 (USA);2. Department of Chemical and Biomolecular Engineering, University of Melbourne, Victoria 3010 (Australia);3. U.S. Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD 21010 (USA) |
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| Abstract: | 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. |
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| Keywords: | block copolymers microgels nanoparticles shape anisotropy stimuli‐responsive materials |
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