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Hierarchical porous polymer scaffolds from block copolymers.

Authors
  • Sai, Hiroaki
  • Tan, Kwan Wee
  • Hur, Kahyun
  • Asenath-Smith, Emily
  • Hovden, Robert
  • Jiang, Yi
  • Riccio, Mark
  • Muller, David A
  • Elser, Veit
  • Estroff, Lara A
  • Gruner, Sol M
  • Wiesner, Ulrich
Type
Published Article
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Aug 02, 2013
Volume
341
Issue
6145
Pages
530–534
Identifiers
DOI: 10.1126/science.1238159
PMID: 23908232
Source
Medline
License
Unknown

Abstract

Hierarchical porous polymer materials are of increasing importance because of their potential application in catalysis, separation technology, or bioengineering. Examples for their synthesis exist, but there is a need for a facile yet versatile conceptual approach to such hierarchical scaffolds and quantitative characterization of their nonperiodic pore systems. Here, we introduce a synthesis method combining well-established concepts of macroscale spinodal decomposition and nanoscale block copolymer self-assembly with porosity formation on both length scales via rinsing with protic solvents. We used scanning electron microscopy, small-angle x-ray scattering, transmission electron tomography, and nanoscale x-ray computed tomography for quantitative pore-structure characterization. The method was demonstrated for AB- and ABC-type block copolymers, and resulting materials were used as scaffolds for calcite crystal growth.

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