10.6084/m9.figshare.5666713.v1 Elisângela Aparecida da Silva Elisângela Aparecida da Silva Dario Windmöller Dario Windmöller Glaura Goulart Silva Glaura Goulart Silva Kátia Cecília de Souza Figueiredo Kátia Cecília de Souza Figueiredo Polydimethylsiloxane Membranes Containing Multi-walled Carbon Nanotubes for Gas Separation SciELO journals 2017 carbon dioxide gas separation mixed matrix membranes multi-walled carbon nanotubes polydimethylsiloxane 2017-12-05 08:48:54 Dataset https://scielo.figshare.com/articles/dataset/Polydimethylsiloxane_Membranes_Containing_Multi-walled_Carbon_Nanotubes_for_Gas_Separation/5666713 <div><p>Polydimethylsiloxane (PDMS) membranes with different concentrations of multi-walled carbon nanotubes were prepared in order to evaluate their gas separation performances. Mixed matrix membranes were characterized by scanning electron microscopy, thermogravimetric analysis, Fourier transformed infrared, positron annihilation lifetime and Raman spectroscopies and X-ray diffraction. The permeabilities to CO2, CH4, N2 and O2 were determined. No phase separation was noticed. For carbon nanotubes content of 1 wt%, it was shown a decrease in membrane permeability with slight increase in ideal selectivity, compared to pure PDMS. However, the increase in the filler load up to 6.7 wt% increased the free volume average size of the membranes, improving the contribution of the diffusion to the transport and decreasing ideal selectivities of CO2/CH4, CO2/N2 and O2/N2.</p></div>