Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 108: Graphene: Adsorption, Intercalation and Other Aspects
O 108.2: Talk
Friday, March 24, 2017, 10:45–11:00, TRE Ma
Graphene/Polymer Composite Membranes for Nano- and Ultrafiltration — •Lukas Madauß1, Jens Schumacher2, Oliver Ochedowski1, Jens Meyer2, Henning Lebius3, Brigitte Band-d'Etat3, Eugenia Toimil Molares4, Christina Trautmann4, Mathias Ulbricht2, and Marika Schleberger1 — 1Universität Duisburg-Essen, Duisburg, Germany — 2Universität Duisburg-Essen, Essen, Germany — 3CIMAP, Caen, France — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
Nanoporous graphene is currently investigated as a promising membrane material in which selective pores can be created depending on the requirements of the application [1]. Here, we report on the irradiation of nanoporous graphene/polymer composite membranes with swift heavy ions and consecutive track etching. The ions directly create atomic pores in the graphene lattice while cylindrical tracks consisting of damaged material are created in the polymer support. Chemical etching converts the ion tracks in the polymer into large open channels [2] without attacking the graphene layer. The graphene coverage is significantly improved by protecting graphene by a PMMA layer during the track etching process. Our method presents a facile route to create high-quality suspended graphene on a flexible polymeric membrane with pores of tunable size. The development of porous graphene/polymer composite membranes is promising for fast and selective ultrafiltration separation processes.
[1] S. P. Surwade, Nature Nanotechnology, 10, 459-464, 2015 [2] T.W. Cornelius, NIMB, 265, 553-557, 2007