Mixed matrix membranes consisting of SEBS block copolymers and size-controlled ZIF-8 nanoparticles for CO 2 capture

Won Seok Chi, Sinyoung Hwang, Seung Joon Lee, Sungmin Park, Youn-Sang Bae, Du Yeol Ryu, Jong Hak Kim, Jinsoo Kim

Research output: Contribution to journalArticle

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Abstract

Size-controlled zeolite imidazole frameworks (ZIF-8) with similar pore structures and surface areas were synthesized by altering the types of precursors and used in generating CO 2 separation membranes. The use of zinc nitrate, zinc acetate and zinc chloride resulted in the formation of ZIF-8 materials that were 88, 240 and 533nm in size (ZIF-8(S), ZIF-8(M) and ZIF-8(L)), respectively. ZIF-8 particles were homogeneously distributed within a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) block copolymer matrix without significantly destroying the microphase-separated structure of SEBS to form mixed matrix membranes (MMMs), which was confirmed via small-angle X-ray scattering (SAXS), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The mutual interaction, mechanical strength and interfacial properties of the ZIF-8 filler particles and the SEBS matrix were characterized via Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a universal tensile machine (UTM). The introduction of ZIF-8 led to considerable enhancement in gas permeability regardless of framework dimensions. In particular, MMMs loaded to 30wt% with ZIF-8(M) exhibited approximately 2.5-fold enhancement with regard to CO 2 permeability, increasing from 170.6 to 454.6Barrer (1Barrer=1×10 -10 cm 3 (STP)cmcm -2 s -1 cmHg -1 ) at 35°C without significant CO 2 /N 2 loss (from 12.4 to 12.0) and yielded CO 2 /CH 4 selectivity enhancement (from 4.3 to 5.4) compared to unmodified neat SEBS membranes. The high performance of MMMs based on ZIF-8(M) could be attributed to (1) the larger mass transfer resistance of SEBS/ZIF-8(S) and/or (2) the larger interfacial free volume between the polymer matrix and the inorganic filler particles of SEBS/ZIF-8(L). The efforts of this study provide insight with regard to the optimized size of ZIFs contained within microphase-separated block copolymers for the creation of highly efficient CO 2 separation membranes.

Original languageEnglish
Pages (from-to)479-488
Number of pages10
JournalJournal of Membrane Science
Volume495
DOIs
Publication statusPublished - 2015 Dec 1

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Carbon Monoxide
block copolymers
Nanoparticles
Block copolymers
membranes
Membranes
nanoparticles
matrices
Polystyrenes
fillers
Fillers
augmentation
Permeability
polystyrene
permeability
Zinc
Zinc Acetate
zinc
zinc chlorides
Zinc chloride

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

@article{d7acbe1877d340efa2de920a23e79094,
title = "Mixed matrix membranes consisting of SEBS block copolymers and size-controlled ZIF-8 nanoparticles for CO 2 capture",
abstract = "Size-controlled zeolite imidazole frameworks (ZIF-8) with similar pore structures and surface areas were synthesized by altering the types of precursors and used in generating CO 2 separation membranes. The use of zinc nitrate, zinc acetate and zinc chloride resulted in the formation of ZIF-8 materials that were 88, 240 and 533nm in size (ZIF-8(S), ZIF-8(M) and ZIF-8(L)), respectively. ZIF-8 particles were homogeneously distributed within a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) block copolymer matrix without significantly destroying the microphase-separated structure of SEBS to form mixed matrix membranes (MMMs), which was confirmed via small-angle X-ray scattering (SAXS), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The mutual interaction, mechanical strength and interfacial properties of the ZIF-8 filler particles and the SEBS matrix were characterized via Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a universal tensile machine (UTM). The introduction of ZIF-8 led to considerable enhancement in gas permeability regardless of framework dimensions. In particular, MMMs loaded to 30wt{\%} with ZIF-8(M) exhibited approximately 2.5-fold enhancement with regard to CO 2 permeability, increasing from 170.6 to 454.6Barrer (1Barrer=1×10 -10 cm 3 (STP)cmcm -2 s -1 cmHg -1 ) at 35°C without significant CO 2 /N 2 loss (from 12.4 to 12.0) and yielded CO 2 /CH 4 selectivity enhancement (from 4.3 to 5.4) compared to unmodified neat SEBS membranes. The high performance of MMMs based on ZIF-8(M) could be attributed to (1) the larger mass transfer resistance of SEBS/ZIF-8(S) and/or (2) the larger interfacial free volume between the polymer matrix and the inorganic filler particles of SEBS/ZIF-8(L). The efforts of this study provide insight with regard to the optimized size of ZIFs contained within microphase-separated block copolymers for the creation of highly efficient CO 2 separation membranes.",
author = "Chi, {Won Seok} and Sinyoung Hwang and Lee, {Seung Joon} and Sungmin Park and Youn-Sang Bae and Ryu, {Du Yeol} and Kim, {Jong Hak} and Jinsoo Kim",
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month = "12",
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language = "English",
volume = "495",
pages = "479--488",
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Mixed matrix membranes consisting of SEBS block copolymers and size-controlled ZIF-8 nanoparticles for CO 2 capture . / Chi, Won Seok; Hwang, Sinyoung; Lee, Seung Joon; Park, Sungmin; Bae, Youn-Sang; Ryu, Du Yeol; Kim, Jong Hak; Kim, Jinsoo.

In: Journal of Membrane Science, Vol. 495, 01.12.2015, p. 479-488.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mixed matrix membranes consisting of SEBS block copolymers and size-controlled ZIF-8 nanoparticles for CO 2 capture

AU - Chi, Won Seok

AU - Hwang, Sinyoung

AU - Lee, Seung Joon

AU - Park, Sungmin

AU - Bae, Youn-Sang

AU - Ryu, Du Yeol

AU - Kim, Jong Hak

AU - Kim, Jinsoo

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Size-controlled zeolite imidazole frameworks (ZIF-8) with similar pore structures and surface areas were synthesized by altering the types of precursors and used in generating CO 2 separation membranes. The use of zinc nitrate, zinc acetate and zinc chloride resulted in the formation of ZIF-8 materials that were 88, 240 and 533nm in size (ZIF-8(S), ZIF-8(M) and ZIF-8(L)), respectively. ZIF-8 particles were homogeneously distributed within a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) block copolymer matrix without significantly destroying the microphase-separated structure of SEBS to form mixed matrix membranes (MMMs), which was confirmed via small-angle X-ray scattering (SAXS), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The mutual interaction, mechanical strength and interfacial properties of the ZIF-8 filler particles and the SEBS matrix were characterized via Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a universal tensile machine (UTM). The introduction of ZIF-8 led to considerable enhancement in gas permeability regardless of framework dimensions. In particular, MMMs loaded to 30wt% with ZIF-8(M) exhibited approximately 2.5-fold enhancement with regard to CO 2 permeability, increasing from 170.6 to 454.6Barrer (1Barrer=1×10 -10 cm 3 (STP)cmcm -2 s -1 cmHg -1 ) at 35°C without significant CO 2 /N 2 loss (from 12.4 to 12.0) and yielded CO 2 /CH 4 selectivity enhancement (from 4.3 to 5.4) compared to unmodified neat SEBS membranes. The high performance of MMMs based on ZIF-8(M) could be attributed to (1) the larger mass transfer resistance of SEBS/ZIF-8(S) and/or (2) the larger interfacial free volume between the polymer matrix and the inorganic filler particles of SEBS/ZIF-8(L). The efforts of this study provide insight with regard to the optimized size of ZIFs contained within microphase-separated block copolymers for the creation of highly efficient CO 2 separation membranes.

AB - Size-controlled zeolite imidazole frameworks (ZIF-8) with similar pore structures and surface areas were synthesized by altering the types of precursors and used in generating CO 2 separation membranes. The use of zinc nitrate, zinc acetate and zinc chloride resulted in the formation of ZIF-8 materials that were 88, 240 and 533nm in size (ZIF-8(S), ZIF-8(M) and ZIF-8(L)), respectively. ZIF-8 particles were homogeneously distributed within a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) block copolymer matrix without significantly destroying the microphase-separated structure of SEBS to form mixed matrix membranes (MMMs), which was confirmed via small-angle X-ray scattering (SAXS), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The mutual interaction, mechanical strength and interfacial properties of the ZIF-8 filler particles and the SEBS matrix were characterized via Fourier-transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and a universal tensile machine (UTM). The introduction of ZIF-8 led to considerable enhancement in gas permeability regardless of framework dimensions. In particular, MMMs loaded to 30wt% with ZIF-8(M) exhibited approximately 2.5-fold enhancement with regard to CO 2 permeability, increasing from 170.6 to 454.6Barrer (1Barrer=1×10 -10 cm 3 (STP)cmcm -2 s -1 cmHg -1 ) at 35°C without significant CO 2 /N 2 loss (from 12.4 to 12.0) and yielded CO 2 /CH 4 selectivity enhancement (from 4.3 to 5.4) compared to unmodified neat SEBS membranes. The high performance of MMMs based on ZIF-8(M) could be attributed to (1) the larger mass transfer resistance of SEBS/ZIF-8(S) and/or (2) the larger interfacial free volume between the polymer matrix and the inorganic filler particles of SEBS/ZIF-8(L). The efforts of this study provide insight with regard to the optimized size of ZIFs contained within microphase-separated block copolymers for the creation of highly efficient CO 2 separation membranes.

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