High performance carbon molecular sieve membranes derived from hyperbranched polyimide precursors for improved gas separation applications

Yi Hui Sim; Huan Wang; Fu Yun Li; Mei Ling Chua; Tai Shung Chung; Masahiro Toriida; Shoji Tamai

doi:10.1016/j.carbon.2012.10.036

High performance carbon molecular sieve membranes derived from hyperbranched polyimide precursors for improved gas separation applications

Yi Hui Sim, Huan Wang, Fu Yun Li, Mei Ling Chua, Tai Shung Chung^*, Masahiro Toriida, Shoji Tamai

^*Corresponding author for this work

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

36 Scopus citations

Abstract

A series of hyperbranched polyimides (HBPI) were selected as precursors for the production of carbon molecular sieve membranes (CMSMs) and the gas separation performance of the resultant CMSMs was explored. By varying the monomer compositions of HBPI precursor polymers, the influences of degree of branching on pore size and distribution of the CMSMs are investigated and examined. A CO₂ permeability of 1085 Barrer with CO ₂/CH₄ selectivity of 52 is attained. Thermal analyses reveal that the chain rigidity of the precursors increases with the degree of branching, while the density of the CMSMs shows an opposite trend. In view of the unique network structure offered by the HBPI precursors, it is speculated that the rigid network of the HBPI with the highest degree of branching has facilitated the formation of ultra-micropores, giving rise to the more constrained structure and improved diffusivity selectivity. The unique hyperbranched network structure found in HBPI possesses great potential to producing CMSMs with superior performance.

Original language	English (US)
Pages (from-to)	101-111
Number of pages	11
Journal	Carbon
Volume	53
DOIs	https://doi.org/10.1016/j.carbon.2012.10.036
State	Published - Mar 2013
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to thank Mitsui Chemicals Inc. for funding this research with the Grant number of R-279-000-186-597 and the Singapore National Research Foundation (NRF) under its “Molecular Engineering of Membrane Materials: Research and Technology for Energy Development of Hydrogen, Natural Gas and Syngas” (grant number R-279-000-261-281 ). The authors would like to express their thanks to Dr. Li Pei and Miss. Zhong Peishan for their useful comments and suggestions.

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1016/j.carbon.2012.10.036

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title = "High performance carbon molecular sieve membranes derived from hyperbranched polyimide precursors for improved gas separation applications",

abstract = "A series of hyperbranched polyimides (HBPI) were selected as precursors for the production of carbon molecular sieve membranes (CMSMs) and the gas separation performance of the resultant CMSMs was explored. By varying the monomer compositions of HBPI precursor polymers, the influences of degree of branching on pore size and distribution of the CMSMs are investigated and examined. A CO2 permeability of 1085 Barrer with CO 2/CH4 selectivity of 52 is attained. Thermal analyses reveal that the chain rigidity of the precursors increases with the degree of branching, while the density of the CMSMs shows an opposite trend. In view of the unique network structure offered by the HBPI precursors, it is speculated that the rigid network of the HBPI with the highest degree of branching has facilitated the formation of ultra-micropores, giving rise to the more constrained structure and improved diffusivity selectivity. The unique hyperbranched network structure found in HBPI possesses great potential to producing CMSMs with superior performance.",

author = "Sim, {Yi Hui} and Huan Wang and Li, {Fu Yun} and Chua, {Mei Ling} and Chung, {Tai Shung} and Masahiro Toriida and Shoji Tamai",

note = "Funding Information: The authors would like to thank Mitsui Chemicals Inc. for funding this research with the Grant number of R-279-000-186-597 and the Singapore National Research Foundation (NRF) under its “Molecular Engineering of Membrane Materials: Research and Technology for Energy Development of Hydrogen, Natural Gas and Syngas” (grant number R-279-000-261-281 ). The authors would like to express their thanks to Dr. Li Pei and Miss. Zhong Peishan for their useful comments and suggestions.",

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AU - Sim, Yi Hui

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AU - Li, Fu Yun

AU - Chua, Mei Ling

AU - Chung, Tai Shung

AU - Toriida, Masahiro

AU - Tamai, Shoji

N1 - Funding Information: The authors would like to thank Mitsui Chemicals Inc. for funding this research with the Grant number of R-279-000-186-597 and the Singapore National Research Foundation (NRF) under its “Molecular Engineering of Membrane Materials: Research and Technology for Energy Development of Hydrogen, Natural Gas and Syngas” (grant number R-279-000-261-281 ). The authors would like to express their thanks to Dr. Li Pei and Miss. Zhong Peishan for their useful comments and suggestions.

PY - 2013/3

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N2 - A series of hyperbranched polyimides (HBPI) were selected as precursors for the production of carbon molecular sieve membranes (CMSMs) and the gas separation performance of the resultant CMSMs was explored. By varying the monomer compositions of HBPI precursor polymers, the influences of degree of branching on pore size and distribution of the CMSMs are investigated and examined. A CO2 permeability of 1085 Barrer with CO 2/CH4 selectivity of 52 is attained. Thermal analyses reveal that the chain rigidity of the precursors increases with the degree of branching, while the density of the CMSMs shows an opposite trend. In view of the unique network structure offered by the HBPI precursors, it is speculated that the rigid network of the HBPI with the highest degree of branching has facilitated the formation of ultra-micropores, giving rise to the more constrained structure and improved diffusivity selectivity. The unique hyperbranched network structure found in HBPI possesses great potential to producing CMSMs with superior performance.

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High performance carbon molecular sieve membranes derived from hyperbranched polyimide precursors for improved gas separation applications

Abstract

Bibliographical note

ASJC Scopus subject areas

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