TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Esser, Tobias A1 - Wolf, Tobias A1 - Schubert, Tim A1 - Benra, Jan A1 - Forero, Stefan A1 - Maistros, George A1 - Barbe, Stéphan A1 - Theodorakopoulos, George V. A1 - Karousos, Dionysios S. A1 - Sapalidis, Andreas A. A1 - Favvas, Evangelos P. T1 - CO2/CH4 and He/N2 Separation Properties and Water Permeability Valuation of Mixed Matrix MWCNTs-Based Cellulose Acetate Flat Sheet Membranes: A Study of the Optimization of the Filler Material Dispersion Method JF - Nanomaterials N2 - The main scope of this work is to develop nano-carbon-based mixed matrix celluloseacetate membranes (MMMs) for the potential use in both gas and liquid separation processes. Forthis purpose, a variety of mixed matrix membranes, consisting of cellulose acetate (CA) polymerand carbon nanotubes as additive material were prepared, characterized, and tested. Multi-walledcarbon nanotubes (MWCNTs) were used as filler material and diacetone alcohol (DAA) as solvent.The first main objective towards highly efficient composite membranes was the proper preparationof agglomerate-free MWCNTs dispersions. Rotor-stator system (RS) and ultrasonic sonotrode (USS)were used to achieve the nanofillers’ dispersion. In addition, the first results of the application of thethree-roll mill (TRM) technology in the filler dispersion achieved were promising. The filler material,MWCNTs, was characterized by scanning electron microscopy (SEM) and liquid nitrogen (LN2)adsorption-desorption isotherms at 77 K. The derivatives CA-based mixed matrix membranes werecharacterized by tensile strength and water contact angle measurements, impedance spectroscopy,gas permeability/selectivity measurements, and water permeability tests. The studied membranesprovide remarkable water permeation properties, 12–109 L/m2/h/bar, and also good separationfactors of carbon dioxide and helium separations. Specifically, a separation factor of 87 for 10%He/N2feed concentration and a selectivity value of 55.4 for 10% CO2/CH4feed concentrationwere achieved. KW - Cellulose acetate KW - Mixed matrix membranes (MMMs) KW - Filler dispersion KW - Ultrasonic sonotrode (USS) KW - Rotor-stator system (RS) KW - Impedance spectroscopy KW - CO2 separation Y1 - 2021 UN - https://nbn-resolving.org/urn:nbn:de:hbz:832-epub4-16551 SN - 2079-4991 SS - 2079-4991 U6 - https://doi.org/10.3390/nano11020280 DO - https://doi.org/10.3390/nano11020280 VL - 11 IS - 2 SP - 21 S1 - 21 PB - MDPI ER -