Multicomponent gas and vapour sorption in high free volume polymers

In this work the comprehensive study of sorption of vapours (alcohols, alkanes, water), gases (O2, N2, CO2, CH4, C4H10) and their mixture in flat polymer membranes is presented. Polymer membranes from copolymers of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (87%) with tetrafluoroethylene (23%) {Teflon AF 2400}[1], from 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'-spirobisindane and tetrafluorotere-phthalonitrile {PIM-1} [2] and from other polymer with intrinsic microporosity(PIM) based analogues [3] were prepared by the solution casting and solvent evaporation method. Single gas and vapour experiments were performed gravimetrically at 25ºC and at selected pressures using self-developed sorption apparatuses [4]. For detection of vapour phase composition the IR-spectrometer iS10 (Thermo Scientific) equipped with 250 ml gas column was used (Fig.1). Figure 1: Newly constructed apparatus for detemination of multicomponent gas/vapour sorption. Acknowledgements: The work leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° NMP3SL-2009-228631, project DoubleNanoMem. The authors are also thankful for financial support of the Grant Agency of Czech Republic (Grants No. 106/10/1194). References 1. J.C. Jansen, K. Friess, E. Drioli, J. Membr. Sci. 367 (2011) 141. 2. P.M. Budd, B.S. Ghanem, S. Makhseed, N.B. McKeown, K.J. Msayib and C.E. Tattershall, Chem. Commun., 2004, 230. 3. N. B. McKeown et al., in preparation 4. K. Friess, J. C. Jansen, O. Vopi?ka, A. Randová, V. Hynek, M. ?ípek, L. Bartovská, P. Izák, M. Dingemans, J. Dewulf, H. Van Langenhove, E. Drioli, J. Membr. Sci. 338 (2009) 161.