Elastomers with reversible nanoporosity
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Elastomers with reversible nanoporosity. / Szewczykowski, Piotr P.; Andersen, Kenneth; Schulte, Lars; Mortensen, Kell; Vigild, Martin Etchells; Ndoni, Sokol.
I: Macromolecules, Bind 42, Nr. 15, 2009, s. 5636-5641.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Elastomers with reversible nanoporosity
AU - Szewczykowski, Piotr P.
AU - Andersen, Kenneth
AU - Schulte, Lars
AU - Mortensen, Kell
AU - Vigild, Martin Etchells
AU - Ndoni, Sokol
PY - 2009
Y1 - 2009
N2 - 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 in 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.
AB - 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 in 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.
U2 - 10.1021/ma900198k
DO - 10.1021/ma900198k
M3 - Journal article
VL - 42
SP - 5636
EP - 5641
JO - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 15
ER -
ID: 14335743