Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 25, Issue 26, Pages 4091-4100Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501079
Keywords
microcapsules; microfluidics; microstructures; self-assembly; supramolecular materials
Categories
Funding
- Engineering Physical Sciences Research Council
- European Research Council [240629]
- Isaac Newton Trust [13.7(c)]
- Nano Doctoral Training Centre (NanoDTC)
- University of Cambridge [EP/K503496/1]
- [EP/H046593/1]
- EPSRC [EP/H046593/1] Funding Source: UKRI
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Supramolecular self-assembly offers routes to challenging architectures on the molecular and macroscopic scale. Coupled with microfluidics it has been used to make microcapsuleswhere a 2D sheet is shaped in 3D, encapsulating the volume within. In this paper, a versatile methodology to direct the accumulation of capsule-forming components to the droplet interface using electrostatic interactions is described. In this approach, charged copolymers are selectively partitioned to the microdroplet interface by a complementary charged surfactant for subsequent supramolecular cross-linking via cucurbit[8]uril. This dynamic assembly process is employed to selectively form both hollow, ultrathin microcapsules and solid microparticles from a single solution. The ability to dictate the distribution of a mixture of charged copolymers within the microdroplet, as demonstrated by the single-step fabrication of distinct core-shell microcapsules, gives access to a new generation of innovative self-assembled constructs.
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