Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py

Mohd Zamidi Ahmad; Edidiong D. Asuquo; Sandra Rico-Martinez; Mustafa Alshurafa; Vicente Orts-Mercadillo; Anirudh Devarajan; Angel E. Lozano; Andrew B. Foster; Peter M. Budd

doi:10.1016/j.polymer.2023.126556

Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py

Mohd Zamidi Ahmad^*, Edidiong D. Asuquo, Sandra Rico-Martinez, Mustafa Alshurafa, Vicente Orts-Mercadillo, Anirudh Devarajan, Angel E. Lozano, Andrew B. Foster, Peter M. Budd

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Gas separation properties are reported for self-standing polymer of intrinsic microporosity (PIM) films after addition of palladium (II) acetate or iron (II) acetate by solid state or liquid state mixing. Membranes, with thicknesses in the range 35–55 μm, were prepared from three high molar mass PIMs, two different branched versions of the much-reported PIM-1 (PIM-1a and PIM-1b) and of PIM-Py. Addition of either Fe(OAc)₂ or Pd(OAc)₂ to all three PIMs led to a reduction in permeability and increase in selectivity, but the permeability reduction was much greater for Pd(OAc)₂, which is able to interact with branch points in the PIM and crosslink the polymer. CO₂/CH₄ selectivity of membranes containing Pd(OAc)₂ was poor upon aging, especially after solid state addition to the PIM-1 polymers, for which CO₂ permeabilities dropped to below 200 Barrer after 85 days. Hydrogen permeability and H₂/N₂ selectivity of membranes containing Pd(OAc)₂ did more closely follow conventional permeability/selectivity trade off upon aging. This illustrates the profound differences that can arise in gas permeation properties and aging behaviour from variations in chemical structure and macromolecular characteristics, and from the addition of metal acetates that interact with the polymer in different ways.

Original language	English
Article number	126556
Journal	Polymer
Volume	292
Early online date	5 Dec 2023
DOIs	https://doi.org/10.1016/j.polymer.2023.126556
Publication status	Published - 19 Jan 2024

Keywords

CO/CH separation
CO/N separation
Crosslinking
Gas separation
H/N separation
Metal coordination
PIM-1
Polymer of intrinsic microporosity

Research Beacons, Institutes and Platforms

Henry Royce Institute

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https://linkinghub.elsevier.com/retrieve/pii/S0032386123008868

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@article{e00c757a3d1d4567b36f56382d2181e1,

title = "Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py",

abstract = "Gas separation properties are reported for self-standing polymer of intrinsic microporosity (PIM) films after addition of palladium (II) acetate or iron (II) acetate by solid state or liquid state mixing. Membranes, with thicknesses in the range 35–55 μm, were prepared from three high molar mass PIMs, two different branched versions of the much-reported PIM-1 (PIM-1a and PIM-1b) and of PIM-Py. Addition of either Fe(OAc)2 or Pd(OAc)2 to all three PIMs led to a reduction in permeability and increase in selectivity, but the permeability reduction was much greater for Pd(OAc)2, which is able to interact with branch points in the PIM and crosslink the polymer. CO2/CH4 selectivity of membranes containing Pd(OAc)2 was poor upon aging, especially after solid state addition to the PIM-1 polymers, for which CO2 permeabilities dropped to below 200 Barrer after 85 days. Hydrogen permeability and H2/N2 selectivity of membranes containing Pd(OAc)2 did more closely follow conventional permeability/selectivity trade off upon aging. This illustrates the profound differences that can arise in gas permeation properties and aging behaviour from variations in chemical structure and macromolecular characteristics, and from the addition of metal acetates that interact with the polymer in different ways.",

keywords = "CO/CH separation, CO/N separation, Crosslinking, Gas separation, H/N separation, Metal coordination, PIM-1, Polymer of intrinsic microporosity",

author = "Ahmad, {Mohd Zamidi} and Asuquo, {Edidiong D.} and Sandra Rico-Martinez and Mustafa Alshurafa and Vicente Orts-Mercadillo and Anirudh Devarajan and Lozano, {Angel E.} and Foster, {Andrew B.} and Budd, {Peter M.}",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2024",

month = jan,

day = "19",

doi = "10.1016/j.polymer.2023.126556",

language = "English",

volume = "292",

journal = "Polymer",

issn = "0032-3861",

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TY - JOUR

T1 - Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py

AU - Ahmad, Mohd Zamidi

AU - Asuquo, Edidiong D.

AU - Rico-Martinez, Sandra

AU - Alshurafa, Mustafa

AU - Orts-Mercadillo, Vicente

AU - Devarajan, Anirudh

AU - Lozano, Angel E.

AU - Foster, Andrew B.

AU - Budd, Peter M.

PY - 2024/1/19

Y1 - 2024/1/19

N2 - Gas separation properties are reported for self-standing polymer of intrinsic microporosity (PIM) films after addition of palladium (II) acetate or iron (II) acetate by solid state or liquid state mixing. Membranes, with thicknesses in the range 35–55 μm, were prepared from three high molar mass PIMs, two different branched versions of the much-reported PIM-1 (PIM-1a and PIM-1b) and of PIM-Py. Addition of either Fe(OAc)2 or Pd(OAc)2 to all three PIMs led to a reduction in permeability and increase in selectivity, but the permeability reduction was much greater for Pd(OAc)2, which is able to interact with branch points in the PIM and crosslink the polymer. CO2/CH4 selectivity of membranes containing Pd(OAc)2 was poor upon aging, especially after solid state addition to the PIM-1 polymers, for which CO2 permeabilities dropped to below 200 Barrer after 85 days. Hydrogen permeability and H2/N2 selectivity of membranes containing Pd(OAc)2 did more closely follow conventional permeability/selectivity trade off upon aging. This illustrates the profound differences that can arise in gas permeation properties and aging behaviour from variations in chemical structure and macromolecular characteristics, and from the addition of metal acetates that interact with the polymer in different ways.

AB - Gas separation properties are reported for self-standing polymer of intrinsic microporosity (PIM) films after addition of palladium (II) acetate or iron (II) acetate by solid state or liquid state mixing. Membranes, with thicknesses in the range 35–55 μm, were prepared from three high molar mass PIMs, two different branched versions of the much-reported PIM-1 (PIM-1a and PIM-1b) and of PIM-Py. Addition of either Fe(OAc)2 or Pd(OAc)2 to all three PIMs led to a reduction in permeability and increase in selectivity, but the permeability reduction was much greater for Pd(OAc)2, which is able to interact with branch points in the PIM and crosslink the polymer. CO2/CH4 selectivity of membranes containing Pd(OAc)2 was poor upon aging, especially after solid state addition to the PIM-1 polymers, for which CO2 permeabilities dropped to below 200 Barrer after 85 days. Hydrogen permeability and H2/N2 selectivity of membranes containing Pd(OAc)2 did more closely follow conventional permeability/selectivity trade off upon aging. This illustrates the profound differences that can arise in gas permeation properties and aging behaviour from variations in chemical structure and macromolecular characteristics, and from the addition of metal acetates that interact with the polymer in different ways.

KW - CO/CH separation

KW - CO/N separation

KW - Crosslinking

KW - Gas separation

KW - H/N separation

KW - Metal coordination

KW - PIM-1

KW - Polymer of intrinsic microporosity

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UR - https://research.manchester.ac.uk/en/publications/e00c757a-3d1d-4567-b36f-56382d2181e1

U2 - 10.1016/j.polymer.2023.126556

DO - 10.1016/j.polymer.2023.126556

M3 - Article

SN - 0032-3861

VL - 292

JO - Polymer

JF - Polymer

M1 - 126556

ER -

Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py

Abstract

Keywords

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Effects of metal acetate addition on the gas separation properties of polymers of intrinsic microporosity PIM-1 and PIM-Py

Abstract

Keywords

Research Beacons, Institutes and Platforms

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Microanalysis Laboratory

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