Hierarchically Structured Microparticles Formed by Interfacial Instabilities of Emulsion Droplets Containing Amphiphilic Block Copolymers†
We gratefully acknowledge funding for this work provided by the National Science Foundation through grant CBET 0741885 and the MRSEC at UMass (DMR 0213695), and the Center for UMass-Industry Research on Polymers.
Graphical Abstract
Blooming block copolymers! Uniform droplets of solvent that contain amphiphilic polystyrene–poly(ethylene oxide) diblock copolymers are prepared using a microcapillary device. Solvent removal drives interfacial instabilities, through which the polymer assembles into complex hierarchical microparticle structures (see picture).