Polymer Colloids

Structured in a flash

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Science  01 Jun 2018:
Vol. 360, Issue 6392, pp. 977-978
DOI: 10.1126/science.360.6392.977-e

Block copolymers will assemble into a range of complex structures driven both by thermodynamics, as defined by the chemical makeup of the blocks, and by the kinetics of the chain motion. When formed into sheets, these structures can range from those with regular periodicity to those with complex, tortuous, random interconnected phases. Grundy et al. developed a scalable process in which a feed stream containing polymers in a solvent contacts a counterstream based on a poor solvent for the polymers, which causes the polymers to precipitate out. Depending on the choice of polymers, one can get anything from simple Janus particles or layered ones to far more complicated, internally structured particles made by kinetic trapping of nonequilibrium phases.

ACS Nano 10.1021/acsnano.8b01260 (2018).

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