Journal article
Elastomers with Reversible Nanoporosity
Computer Aided Process Engineering Center, Department of Chemical and Biochemical Engineering, Technical University of Denmark1
Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
University of Copenhagen4
The Danish Polymer Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark5
Self-organized Nanoporous Materials Group, Self-organizing materials for nanotechnology Section, Department of Micro- and Nanotechnology, Technical University of Denmark6
Self-organizing materials for nanotechnology Section, Department of Micro- and Nanotechnology, Technical University of Denmark7
An elastomer was created via cross-linking a diene block of a polyisoprene-polydimethylsiloxane (PI-PDMS) block copolymer in the ordered state of hexagonal morphology, followed by the quantitative removal of the PDMS component. The elastomer material collapsed following etching of the PDMS and apparently showed no resulting nanoporosity or structure resembling the precursor morphology ill contrast to similar polydiene-based nanoporous material.
However, the collapsed elastomer displayed Surprising properties when exposed to a solvent. In the gel state the material recovers the original nanostructure and displays liquid-filled cavities. Upon several cycles of swelling and drying the cavities open and close in a reversible fashion. When exposed to a nonsolvent, the material remains collapsed.
This discriminating behavior of liquid-material interaction holds potential for the use of these materials in advanced separation or load-release systems.
Language: | English |
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Year: | 2009 |
Pages: | 5636-5641 |
ISSN: | 15205835 and 00249297 |
Types: | Journal article |
DOI: | 10.1021/ma900198k |
ORCIDs: | Ndoni, Sokol and 0000-0002-8998-9390 |