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HomeKey Engineering MaterialsKey Engineering Materials Vol. 801MOF-Modified High Permeability Polyimide Membrane...

MOF-Modified High Permeability Polyimide Membrane for Gas Separation

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Abstract:

This study explored the application of MOF-modified membrane for gas separation. Microporous aluminum fumarate (A520) was used to modify polyimide (PI) membrane using N-methylpyrrolidone (NMP) as solvent. The MOF-modified mixed matrix membrane (MMM) was subjected to gas permeability tests, using gas permeability apparatus (GPA). GPA results showed that adding 10wt% MOF to the membrane increased permeabilities of N₂ and CO₂ gases by up to 34%, and by 19% for O₂ gas, without compromising selectivity. Further increasing MOF loading beyond 10wt% considerably decreased selectivities despite significantly increased permeabilities. Cahn adsorption experiment confirmed and supported this GPA data. These results indicate that MOF were successfully intercalated with the polymer as revealed by scanning electron microscope (SEM) images. Other characterizations like dynamic mechanical analysis (DMA), x-ray diffraction (XRD), and positron annihilation lifetime spectroscopy (PALS) showed that the interface and mechanical properties of the MMM also improved. MOF loading beyond 10wt% revealed aggregations forming non-selective voids that probably caused lowered selectivity.

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Periodical:

Key Engineering Materials (Volume 801)

Pages:

313-318

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.801.313

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Online since:

May 2019

Authors:

Dante P. Bernabe*, Alvin R. Caparanga, Chien Chieh Hu, Sheng Jie You, Kueir Rarn Lee, Juin Yih Lai

Keywords:

Blending, Gas Separation, Metal-Organic Framework, Permeability, Selectivity

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© 2019 Trans Tech Publications Ltd. All Rights Reserved

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