Supercritical carbon dioxide-treated electrospun poly(vinylidene fluoride) nanofibrous membranes : morphology, structures and properties as an ionic-liquid host
Yee, Wu Aik
Nguyen, Chien A.
Lee, Pooi See
Date of Issue2010
School of Materials Science and Engineering
A reverse-barrier technique is used to enable the treatment of electrospun poly(vinylidene fluoride) nanofibrous membranes with supercritical carbon dioxide. The treatment induces the formation of nanopores and extended-chain β crystallites of small lateral dimensions in the nanofibers. It also creates interfiber junctions, resulting in a remarkable improvement in mechanical properties of the membranes. The treated membranes are able to retain their shape very well after loading with an ionic liquid (IL). The ionic conductivity of the IL-loaded membrane is very close to that of the neat IL.
Macromolecular rapid communications
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