NDLI: Mixed Matrix Membranes Based on $Torlon^{®}$ and ZIF-8 for High-Temperature, Size-Selective Gas Separations

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Mixed Matrix Membranes Based on $Torlon^{®}$ and ZIF-8 for High-Temperature, Size-Selective Gas Separations

Content Provider	MDPI
Author	Pascale, Matilde De Benedetti, Francesco Maria Lasseuguette, Elsa Ferrari, Maria-Chiara Papchenko, Kseniya Esposti, Micaela Degli Fabbri, Paola Angelis, Maria Grazia De
Copyright Year	2021
Description	$Torlon^{®}$ is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced $He/CO_{2}$ and $H_{2}/CO_{2}$ separations, by compounding $Torlon^{®}$ with a highly permeable filler, ZIF-8, to fabricate Mixed Matrix Membranes (MMMs). The effect of filler loading, gas size, and temperature on the MMMs permeability, diffusivity, and selectivity was investigated. The He permeability increased by a factor of 3, while the $He/CO_{2}$ selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to $Torlon^{®}$; similar trends were observed for the case of $H_{2}$. The MMMs permeability and size-selectivity were both enhanced by temperature. The behavior of MMMs is intermediate between the pure polymer and pure filler ones, and can be described with models for composites, indicating that such materials have a good polymer/filler adhesion and their performance could be tailored by acting on the formulation. The behavior observed is in line with previous investigations on MMMs based on glassy polymers and ZIF-8, in similar conditions, and indicates that ZIF-8 can be used as a polymer additive when the permeability is a controlling aspect, with a proper choice of loading and operative temperature.
Starting Page	982
e-ISSN	20770375
DOI	10.3390/membranes11120982
Journal	Membranes
Issue Number	12
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-12-15
Access Restriction	Open
Subject Keyword	Membranes Petroleum Engineering Mixed Matrix Membranes Co2 Capture Gas Separation
Content Type	Text
Resource Type	Article

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