Enhanced gas permeability by fabricating mixed matrix membranes of functionalized multiwalled carbon nanotubes and polymers of intrinsic microporosity (PIM)

Abstract

The derived MMM were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and single gas permeation tests. Gas permeation measurements showed that MMM incorporated with modified and non-modified CNTs exhibited different gas separation performance. The f-MWCNT MMM show better performance compared to MMM with non-modified CNTs in terms of dispersion and permeability at 2 wt% f-MWCNTs loading without sacrificing selectivity. According to diffusivity and solubility data derived from the time-lag method, the PEG chains on MWCNTs show interaction with CO 2 as indicated by an increase of the solubility of the polar gas and a reduction of the solubility of non-polar gas, which is advantageous for CO 2 /N 2 separation. The mechanical properties and experimental sorption isotherms of CO 2 and N 2 of the f-MWCNTs/PIM MMM were enhanced as well. KeywordsMixed matrix membrane, Multi-walled carbon nanotubes, Polymer of intrinsic microporosity 1 1. Introduction:

Comparison between hydrophilic and hydrophobic metal nanoparticles on the phase separation phenomena during formation of asymmetric polyethersulphone membranes

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

“…The crosslinked P84 MMMs containing cation exchange particles were prepared for adsorption of BSA and LZ [36]. Moreover many different inorganic particles such as titanium dioxide (TiO 2 ) [37], carbon nanotubes [38], silicon dioxide (SiO 2 ) [39], zinc oxide (ZnO) [40] and hydroxyapatite (HAP) [41] were dispersed in polymer matrix to prepare MMMs with microporous or macroporous structures.…”

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“…Carbon nanotubes have opened a new era in the production of multifunctional polymer composites [13,[31][32][33] and are widely used in mix-matrix membranes (MMMs) for separating gas mixtures [34][35][36][37], as well as for emitting СО 2 from gas mixtures [30,38].…”