Pre-treatment of multi-walled carbon nanotubes for polyetherimide mixed matrix hollow fiber membranes

Fabrication and characterization of hydroxylated and carboxylated multiwalled carbon nanotube/polyethersulfone (PES) nanocomposite hollow fiber membranes

“…Nevertheless, membranes cannot permanently resist all stresses and often have short lifetimes as a result. One strategy for improving the life and performance of membranes is to include nanomaterials such as carbon nanotubes (CNTs) in the membrane matrix [34]. To this end, nanomaterials including silica [8], titania [9], aluminum oxide [35], zinc oxide [36], silver [37][38][39], copper, selenium [40] as well as carbon nanotubes [34,[41][42][43] have been used to form nanocomposite membranes.…”

“…One strategy for improving the life and performance of membranes is to include nanomaterials such as carbon nanotubes (CNTs) in the membrane matrix [34]. To this end, nanomaterials including silica [8], titania [9], aluminum oxide [35], zinc oxide [36], silver [37][38][39], copper, selenium [40] as well as carbon nanotubes [34,[41][42][43] have been used to form nanocomposite membranes. However, fabrication of hollow fiber membranes made from nanomaterial-polymer composites present many challenges given the number of variables involved in optimizing hollow fiber formation and the potentially related effects of nanomaterials present in the polymer solution on the phase inversion process.…”

Polydimethylsiloxane Membranes Containing Multi-walled Carbon Nanotubes for Gas Separation

“…The Si-CH 3 symmetric and asymmetric stretching bands were at 2902 and 2904 cm -1 . Regarding de MWCNT, both the D and G bands, around 1330 cm -1 and 1605 cm -1 , could be clearly seen 17,19 . G' corresponding band, at 2650 cm -1 , was noticed.…”

“…As the result, the predicted magnitudes of permeabilities were not achieved 9 . Glassy polymers are usually preferred to the elastomeric ones as matrix for the preparation of CNT-mixed matrix membranes [12][13][14][15][16][17] . This is due to the high selectivity found for these materials, although the permeability is usually very low.…”

In-situ preparation of poly(ether imide)/amino functionalized silica mixed matrix membranes for application in enzyme separation

“…PEI/silicoaluminophosphate crystals (SAPO-34) MMMs [42], PEI/modified zeolite MMMs [43], and PEI/Ag + ion exchanged halloysite nanotubes MMMs [44] were prepared for carbon dioxide/ methane separation. PEI/multi-walled carbon nanotubes (MWCNTs) MMMs promoted the stability of MMMs [45] and could be applied for O 2 /N 2 separation [46]. PEI/Palladium NPs MMMs were prepared and the gas transport properties were analyzed with CO 2 , He and H 2 [47].…”