Molecular interaction, gas transport properties and plasticization behavior of cPIM-1/Torlon blend membranes

Wai Fen Yong; Fu Yun Li; Tai Shung Chung; Yen Wah Tong

doi:10.1016/j.memsci.2014.03.046

Molecular interaction, gas transport properties and plasticization behavior of cPIM-1/Torlon blend membranes

Wai Fen Yong, Fu Yun Li, Tai Shung Chung^*, Yen Wah Tong

^*Corresponding author for this work

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

71 Scopus citations

Abstract

Polymers of intrinsic microporosity, specifically PIM-1, have emerged as promising materials for gas separation due their high gas permeability. However, its insolubility in common polar aprotic solvents like N-Methyl-2-pyrrolidone (NMP) limits its full potential and possible industrial applications. In this study, the solubility of PIM-1 in such solvents has been modified by carboxylation via hydrolysis reaction in a short period of 1h. The success of carboxylation was verified by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and water contact angles. The carboxylated PIM-1 (cPIM-1) was subsequently blended with Torlon to enhance the intrinsic permeability of Torlon rich membranes and the intrinsic selectivity of cPIM-1 rich membranes. The additions of 5, 10 and 30wt% cPIM-1 into Torlon increase its CO₂ permeability by 26%, 128% and 791%, respectively, from the original value of 0.541-0.682, 1.233 and 4.822(1 Barrer=1 × 10^-10 cm³(STP) cm/cm² s cmHg=3.348 × 10^-19 kmol m/m² s Pa) with minor sacrifices in CO₂/CH₄ selectivity. These permeability improvements are attributed to the formation of hydrogen bonding and charge transfer complexes (CTC) between cPIM-1 and Torlon, which promotes better interactions in the blends. In addition, all the cPIM-1/Torlon membranes exhibit a great plasticization resistance up to 30atm. This is ascribed to the incorporation of the rigid Torlon that may lead to restricting chain mobility in CO₂ environments. The overall separation performance has been driven closer to the Robeson upper bound for O₂/N₂, CO₂/CH₄, CO₂/N₂ and H₂/N₂ separations. Therefore, the newly developed membranes may have great potential for energy development and industrial applications.

Original language	English (US)
Pages (from-to)	119-130
Number of pages	12
Journal	Journal of Membrane Science
Volume	462
DOIs	https://doi.org/10.1016/j.memsci.2014.03.046
State	Published - Jul 15 2014

Keywords

Membrane gas separation
PIM-1
Polyimide
Polymer blend

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2014.03.046

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title = "Molecular interaction, gas transport properties and plasticization behavior of cPIM-1/Torlon blend membranes",

abstract = "Polymers of intrinsic microporosity, specifically PIM-1, have emerged as promising materials for gas separation due their high gas permeability. However, its insolubility in common polar aprotic solvents like N-Methyl-2-pyrrolidone (NMP) limits its full potential and possible industrial applications. In this study, the solubility of PIM-1 in such solvents has been modified by carboxylation via hydrolysis reaction in a short period of 1h. The success of carboxylation was verified by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and water contact angles. The carboxylated PIM-1 (cPIM-1) was subsequently blended with Torlon to enhance the intrinsic permeability of Torlon rich membranes and the intrinsic selectivity of cPIM-1 rich membranes. The additions of 5, 10 and 30wt% cPIM-1 into Torlon increase its CO2 permeability by 26%, 128% and 791%, respectively, from the original value of 0.541-0.682, 1.233 and 4.822(1 Barrer=1 × 10-10 cm3(STP) cm/cm2 s cmHg=3.348 × 10-19 kmol m/m2 s Pa) with minor sacrifices in CO2/CH4 selectivity. These permeability improvements are attributed to the formation of hydrogen bonding and charge transfer complexes (CTC) between cPIM-1 and Torlon, which promotes better interactions in the blends. In addition, all the cPIM-1/Torlon membranes exhibit a great plasticization resistance up to 30atm. This is ascribed to the incorporation of the rigid Torlon that may lead to restricting chain mobility in CO2 environments. The overall separation performance has been driven closer to the Robeson upper bound for O2/N2, CO2/CH4, CO2/N2 and H2/N2 separations. Therefore, the newly developed membranes may have great potential for energy development and industrial applications.",

keywords = "Membrane gas separation, PIM-1, Polyimide, Polymer blend",

author = "Yong, {Wai Fen} and Li, {Fu Yun} and Chung, {Tai Shung} and Tong, {Yen Wah}",

year = "2014",

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doi = "10.1016/j.memsci.2014.03.046",

language = "English (US)",

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pages = "119--130",

journal = "Journal of Membrane Science",

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T1 - Molecular interaction, gas transport properties and plasticization behavior of cPIM-1/Torlon blend membranes

AU - Yong, Wai Fen

AU - Li, Fu Yun

AU - Chung, Tai Shung

AU - Tong, Yen Wah

PY - 2014/7/15

Y1 - 2014/7/15

N2 - Polymers of intrinsic microporosity, specifically PIM-1, have emerged as promising materials for gas separation due their high gas permeability. However, its insolubility in common polar aprotic solvents like N-Methyl-2-pyrrolidone (NMP) limits its full potential and possible industrial applications. In this study, the solubility of PIM-1 in such solvents has been modified by carboxylation via hydrolysis reaction in a short period of 1h. The success of carboxylation was verified by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and water contact angles. The carboxylated PIM-1 (cPIM-1) was subsequently blended with Torlon to enhance the intrinsic permeability of Torlon rich membranes and the intrinsic selectivity of cPIM-1 rich membranes. The additions of 5, 10 and 30wt% cPIM-1 into Torlon increase its CO2 permeability by 26%, 128% and 791%, respectively, from the original value of 0.541-0.682, 1.233 and 4.822(1 Barrer=1 × 10-10 cm3(STP) cm/cm2 s cmHg=3.348 × 10-19 kmol m/m2 s Pa) with minor sacrifices in CO2/CH4 selectivity. These permeability improvements are attributed to the formation of hydrogen bonding and charge transfer complexes (CTC) between cPIM-1 and Torlon, which promotes better interactions in the blends. In addition, all the cPIM-1/Torlon membranes exhibit a great plasticization resistance up to 30atm. This is ascribed to the incorporation of the rigid Torlon that may lead to restricting chain mobility in CO2 environments. The overall separation performance has been driven closer to the Robeson upper bound for O2/N2, CO2/CH4, CO2/N2 and H2/N2 separations. Therefore, the newly developed membranes may have great potential for energy development and industrial applications.

AB - Polymers of intrinsic microporosity, specifically PIM-1, have emerged as promising materials for gas separation due their high gas permeability. However, its insolubility in common polar aprotic solvents like N-Methyl-2-pyrrolidone (NMP) limits its full potential and possible industrial applications. In this study, the solubility of PIM-1 in such solvents has been modified by carboxylation via hydrolysis reaction in a short period of 1h. The success of carboxylation was verified by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FTIR) and water contact angles. The carboxylated PIM-1 (cPIM-1) was subsequently blended with Torlon to enhance the intrinsic permeability of Torlon rich membranes and the intrinsic selectivity of cPIM-1 rich membranes. The additions of 5, 10 and 30wt% cPIM-1 into Torlon increase its CO2 permeability by 26%, 128% and 791%, respectively, from the original value of 0.541-0.682, 1.233 and 4.822(1 Barrer=1 × 10-10 cm3(STP) cm/cm2 s cmHg=3.348 × 10-19 kmol m/m2 s Pa) with minor sacrifices in CO2/CH4 selectivity. These permeability improvements are attributed to the formation of hydrogen bonding and charge transfer complexes (CTC) between cPIM-1 and Torlon, which promotes better interactions in the blends. In addition, all the cPIM-1/Torlon membranes exhibit a great plasticization resistance up to 30atm. This is ascribed to the incorporation of the rigid Torlon that may lead to restricting chain mobility in CO2 environments. The overall separation performance has been driven closer to the Robeson upper bound for O2/N2, CO2/CH4, CO2/N2 and H2/N2 separations. Therefore, the newly developed membranes may have great potential for energy development and industrial applications.

KW - Membrane gas separation

KW - PIM-1

KW - Polyimide

KW - Polymer blend

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DO - 10.1016/j.memsci.2014.03.046

M3 - Article

AN - SCOPUS:84897931575

SN - 0376-7388

VL - 462

SP - 119

EP - 130

JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Molecular interaction, gas transport properties and plasticization behavior of cPIM-1/Torlon blend membranes

Abstract

Keywords

ASJC Scopus subject areas

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