Free-standing, polysilsesquioxane-based inorganic/organic hybrid membranes for gas separations

Woo Ram Kang; Albert S. Lee; Sunghwan Park; Sang Hee Park; Kyung Youl Baek; Ki Bong Lee; Sang Hyup Lee; Jung Hyun Lee; Seung Sang Hwang; Jong Suk Lee

doi:10.1016/j.memsci.2014.10.024

Free-standing, polysilsesquioxane-based inorganic/organic hybrid membranes for gas separations

Woo Ram Kang, Albert S. Lee, Sunghwan Park, Sang Hee Park, Kyung Youl Baek, Ki Bong Lee, Sang Hyup Lee, Jung Hyun Lee, Seung Sang Hwang, Jong Suk Lee

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

43 Citations (Scopus)

Abstract

Polysilsesquioxanes (PSSQs) are composite materials consisting of inorganic framework and organic functional groups. Their inherent dual characteristics offer various applications including microelectronics, optics and biosciences. For the first time, free standing ladder-like PSSQ films were successfully prepared for gas separations, allowing practical applications in the membrane area. In order to fabricate a free-standing PSSQ film, a novel ladder-like poly(phenyl-co-glycidoxypropyl) silsesquioxanes with phenyl:glycidoxypropyl copolymer ratio of 6:4 (LPG64) were synthesized by a base-catalyzed sol-gel reaction. Moreover, the LPG64 films were thermally crosslinked with octa(aminophenyl)-T8-silsesquioxane (OAPS) with different concentrations of OAPS. Single gas (i.e. He, H₂, CO₂, O₂, N₂, and CH₄) transport measurements were performed for the LPG64 as well as LPG64/OAPS composite membranes. The LPG64 membrane exhibited a relatively high CO₂ permeability of 47.88Barrer compared to other gases with CO₂/N₂ permselectivity of 30.5. The annealing effect on the transport results of the LPG64 membrane was negligible due to its rigid inorganic framework. Combination of our transport analysis and XRD characterization demonstrated that the addition of OAPS led to more dense chain packing, reducing permeability for all the gases tested in this work with increase in permselectivities. Especially, the LPG64/OAPS (80/20wt/wt) membrane improved He/N₂ and H₂/N₂ permselectivities by 98% and 80%, respectively, compared to those for neat LPG64 membranes.

Original language	English
Pages (from-to)	384-394
Number of pages	11
Journal	Journal of Membrane Science
Volume	475
DOIs	https://doi.org/10.1016/j.memsci.2014.10.024
Publication status	Published - 2015 Feb 1

Bibliographical note

Funding Information:
This work was supported by the Korea CCS R&D Center (KCRC) (No. 2014M1A8A1049315) and the Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20135010100750 ) under the Ministry of Trade, Industry & Energy, Republic of Korea.

Publisher Copyright:
© 2014 Elsevier B.V.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

Crosslinking
Free-standing composite membranes
Gas separations
Ladder-like polysilsesquioxane

ASJC Scopus subject areas

Biochemistry
General Materials Science
Physical and Theoretical Chemistry
Filtration and Separation

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10.1016/j.memsci.2014.10.024

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@article{5e176565effc404c89f0df4c9f00a244,

title = "Free-standing, polysilsesquioxane-based inorganic/organic hybrid membranes for gas separations",

abstract = "Polysilsesquioxanes (PSSQs) are composite materials consisting of inorganic framework and organic functional groups. Their inherent dual characteristics offer various applications including microelectronics, optics and biosciences. For the first time, free standing ladder-like PSSQ films were successfully prepared for gas separations, allowing practical applications in the membrane area. In order to fabricate a free-standing PSSQ film, a novel ladder-like poly(phenyl-co-glycidoxypropyl) silsesquioxanes with phenyl:glycidoxypropyl copolymer ratio of 6:4 (LPG64) were synthesized by a base-catalyzed sol-gel reaction. Moreover, the LPG64 films were thermally crosslinked with octa(aminophenyl)-T8-silsesquioxane (OAPS) with different concentrations of OAPS. Single gas (i.e. He, H2, CO2, O2, N2, and CH4) transport measurements were performed for the LPG64 as well as LPG64/OAPS composite membranes. The LPG64 membrane exhibited a relatively high CO2 permeability of 47.88Barrer compared to other gases with CO2/N2 permselectivity of 30.5. The annealing effect on the transport results of the LPG64 membrane was negligible due to its rigid inorganic framework. Combination of our transport analysis and XRD characterization demonstrated that the addition of OAPS led to more dense chain packing, reducing permeability for all the gases tested in this work with increase in permselectivities. Especially, the LPG64/OAPS (80/20wt/wt) membrane improved He/N2 and H2/N2 permselectivities by 98% and 80%, respectively, compared to those for neat LPG64 membranes.",

keywords = "Crosslinking, Free-standing composite membranes, Gas separations, Ladder-like polysilsesquioxane",

author = "Kang, {Woo Ram} and Lee, {Albert S.} and Sunghwan Park and Park, {Sang Hee} and Baek, {Kyung Youl} and Lee, {Ki Bong} and Lee, {Sang Hyup} and Lee, {Jung Hyun} and Hwang, {Seung Sang} and Lee, {Jong Suk}",

note = "Funding Information: This work was supported by the Korea CCS R&D Center (KCRC) (No. 2014M1A8A1049315) and the Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20135010100750 ) under the Ministry of Trade, Industry & Energy, Republic of Korea. Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2015",

month = feb,

day = "1",

doi = "10.1016/j.memsci.2014.10.024",

language = "English",

volume = "475",

pages = "384--394",

journal = "Journal of Membrane Science",

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T1 - Free-standing, polysilsesquioxane-based inorganic/organic hybrid membranes for gas separations

AU - Kang, Woo Ram

AU - Lee, Albert S.

AU - Park, Sunghwan

AU - Park, Sang Hee

AU - Baek, Kyung Youl

AU - Lee, Ki Bong

AU - Lee, Sang Hyup

AU - Lee, Jung Hyun

AU - Hwang, Seung Sang

AU - Lee, Jong Suk

N1 - Funding Information: This work was supported by the Korea CCS R&D Center (KCRC) (No. 2014M1A8A1049315) and the Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20135010100750 ) under the Ministry of Trade, Industry & Energy, Republic of Korea. Publisher Copyright: © 2014 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Polysilsesquioxanes (PSSQs) are composite materials consisting of inorganic framework and organic functional groups. Their inherent dual characteristics offer various applications including microelectronics, optics and biosciences. For the first time, free standing ladder-like PSSQ films were successfully prepared for gas separations, allowing practical applications in the membrane area. In order to fabricate a free-standing PSSQ film, a novel ladder-like poly(phenyl-co-glycidoxypropyl) silsesquioxanes with phenyl:glycidoxypropyl copolymer ratio of 6:4 (LPG64) were synthesized by a base-catalyzed sol-gel reaction. Moreover, the LPG64 films were thermally crosslinked with octa(aminophenyl)-T8-silsesquioxane (OAPS) with different concentrations of OAPS. Single gas (i.e. He, H2, CO2, O2, N2, and CH4) transport measurements were performed for the LPG64 as well as LPG64/OAPS composite membranes. The LPG64 membrane exhibited a relatively high CO2 permeability of 47.88Barrer compared to other gases with CO2/N2 permselectivity of 30.5. The annealing effect on the transport results of the LPG64 membrane was negligible due to its rigid inorganic framework. Combination of our transport analysis and XRD characterization demonstrated that the addition of OAPS led to more dense chain packing, reducing permeability for all the gases tested in this work with increase in permselectivities. Especially, the LPG64/OAPS (80/20wt/wt) membrane improved He/N2 and H2/N2 permselectivities by 98% and 80%, respectively, compared to those for neat LPG64 membranes.

AB - Polysilsesquioxanes (PSSQs) are composite materials consisting of inorganic framework and organic functional groups. Their inherent dual characteristics offer various applications including microelectronics, optics and biosciences. For the first time, free standing ladder-like PSSQ films were successfully prepared for gas separations, allowing practical applications in the membrane area. In order to fabricate a free-standing PSSQ film, a novel ladder-like poly(phenyl-co-glycidoxypropyl) silsesquioxanes with phenyl:glycidoxypropyl copolymer ratio of 6:4 (LPG64) were synthesized by a base-catalyzed sol-gel reaction. Moreover, the LPG64 films were thermally crosslinked with octa(aminophenyl)-T8-silsesquioxane (OAPS) with different concentrations of OAPS. Single gas (i.e. He, H2, CO2, O2, N2, and CH4) transport measurements were performed for the LPG64 as well as LPG64/OAPS composite membranes. The LPG64 membrane exhibited a relatively high CO2 permeability of 47.88Barrer compared to other gases with CO2/N2 permselectivity of 30.5. The annealing effect on the transport results of the LPG64 membrane was negligible due to its rigid inorganic framework. Combination of our transport analysis and XRD characterization demonstrated that the addition of OAPS led to more dense chain packing, reducing permeability for all the gases tested in this work with increase in permselectivities. Especially, the LPG64/OAPS (80/20wt/wt) membrane improved He/N2 and H2/N2 permselectivities by 98% and 80%, respectively, compared to those for neat LPG64 membranes.

KW - Crosslinking

KW - Free-standing composite membranes

KW - Gas separations

KW - Ladder-like polysilsesquioxane

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DO - 10.1016/j.memsci.2014.10.024

M3 - Article

AN - SCOPUS:84910019806

SN - 0376-7388

VL - 475

SP - 384

EP - 394

JO - Journal of Membrane Science

JF - Journal of Membrane Science

ER -

Free-standing, polysilsesquioxane-based inorganic/organic hybrid membranes for gas separations

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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