Regensburg 2013 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 2: Interfaces and Thin Films I (joint session with DECHEMA and VDI)
CPP 2.12: Talk
Monday, March 11, 2013, 12:45–13:00, H40
Gas permeation through PDMS membranes covered by 2D carbon nanomembranes (CNMs) — •Min Ai1, Sergey Shishatskiy2, Jan Wind2, André Beyer1, Nils Mellech1, Andreas Winter1, Henning Vieker1, Jun Qiu3, and Armin Gölzhäuser1 — 1Physics of Supramolecular Systems of Surfaces, Bielefeld University — 2Institute of Polymer Research, Helmholtz-Zentrum Geesthacht — 3DSM, The Netherlands
Polymeric ultra-thin films are promising candidates to be used as components in miniaturized electronic, medical or energy devices. In this contribution, we report the fabrication of ultra-thin (~1 or 3 nm) carbon nanomembranes (CNMs). Organic self-assembled monolayers were irradiated by electrons, leading to a two-dimensional cross-linked CNM through dehydrogenation and recombination mechanisms [1]. The 1-nm-or 3-nm-thick CNMs with an area of 1.2 square centimeters were then transferred onto polydimethylsiloxane (PDMS) composite membranes. The CNM-PDMS membranes were analyzed by XPS, SFM and Helium Ion Microscopy. Gas permeances of H2, He, CO2, O2, N2, Ar, CH4, C2H6 were measured using "constant volume variable pressure" technique. The new CNM-PDMS composite membranes exhibited significantly lower permeances for all the gases than the PDMS composite membrane and different gas selectivities from the PDMS membrane.
[1] A. Turchanin, D. Käfer, M. El-Desawy, Ch. Wöll, G. Witte, A. Gölzhäuser, Langmuir 25, 7342 (2009).