Macromolecular Rapid Communications
Macromolecular Rapid Communications
5 years ago

Stable Covalently Photo-Crosslinked Poly(Ionic Liquid) Membrane with Gradient Pore Size

Stable Covalently Photo-Crosslinked Poly(Ionic Liquid) Membrane with Gradient Pore Size
Jiayin Yuan, Karoline Täuber, Helmut Schlaad, Alessandro Dani, Weiyi Zhang
Porous polyelectrolyte membranes stable in a highly ionic environment are obtained by covalent crosslinking of an imidazolium-based poly(ionic liquid). The crosslinking reaction involves the UV light-induced thiol–ene (click) chemistry, and the phase separation, occurring during the crosslinking step, generates a fully interconnected porous structure in the membrane. The porosity is on the order of the micrometer scale and the membrane shows a gradient of pore size across the membrane cross-section. The membrane can separate polystyrene latex particles of different size and undergoes actuation in contact with acetone due to the asymmetric porous structure. An imidazolium-based poly(ionic liquid) is covalently crosslinked via UV light-induced thiol–ene click chemistry to yield a stable porous polyelectrolyte membrane, which carries gradients of crosslink density and pore size distribution along its cross-section from top to bottom.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700167

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