Modification of nanoporous supported lyotropic liquid crystal polymer membranes by atomic layer deposition

Xinhua Liang; Xiaoyun Lu; Miao Yu; Andrew S. Cavanagh; Douglas L. Gin; Alan W. Weimer

doi:10.1016/j.memsci.2009.11.067

Modification of nanoporous supported lyotropic liquid crystal polymer membranes by atomic layer deposition

Xinhua Liang
, Xiaoyun Lu
, Miao Yu
, Andrew S. Cavanagh
, Douglas L. Gin
, Alan W. Weimer

Department of Energy, Environmental & Chemical Engineering

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

22 Scopus citations

Abstract

Supported type I bicontinuous cubic (Q_I) lyotropic liquid crystal (LLC) polymer membranes with a 3D-interconnected porous structure and an effective pore size of 0.75 nm were modified by alumina atomic layer deposition (ALD). The ALD-modified polymer membranes have an effective pore size smaller than 0.55 nm and show promise for gas separations. With 10 cycles of alumina ALD coating, the selectivity of an ALD-modified Q_I-phase LLC polymer membrane for H₂/N₂ greatly increased from 12 to 65, while the permeance of H₂ decreased ∼40%. The ALD membrane modification approach described here appears to be universal and has the potential to modify other nanoporous membranes for size-selective separation.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Membrane Science
Volume	349
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2009.11.067
State	Published - Mar 1 2010

Keywords

Alumina
Atomic layer deposition (ALD)
Lyotropic liquid crystal (LLC)
Nanoporous
Polymer membrane

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10.1016/j.memsci.2009.11.067

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title = "Modification of nanoporous supported lyotropic liquid crystal polymer membranes by atomic layer deposition",

abstract = "Supported type I bicontinuous cubic (QI) lyotropic liquid crystal (LLC) polymer membranes with a 3D-interconnected porous structure and an effective pore size of 0.75 nm were modified by alumina atomic layer deposition (ALD). The ALD-modified polymer membranes have an effective pore size smaller than 0.55 nm and show promise for gas separations. With 10 cycles of alumina ALD coating, the selectivity of an ALD-modified QI-phase LLC polymer membrane for H2/N2 greatly increased from 12 to 65, while the permeance of H2 decreased ∼40\%. The ALD membrane modification approach described here appears to be universal and has the potential to modify other nanoporous membranes for size-selective separation.",

keywords = "Alumina, Atomic layer deposition (ALD), Lyotropic liquid crystal (LLC), Nanoporous, Polymer membrane",

author = "Xinhua Liang and Xiaoyun Lu and Miao Yu and Cavanagh, \{Andrew S.\} and Gin, \{Douglas L.\} and Weimer, \{Alan W.\}",

year = "2010",

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doi = "10.1016/j.memsci.2009.11.067",

language = "English",

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TY - JOUR

T1 - Modification of nanoporous supported lyotropic liquid crystal polymer membranes by atomic layer deposition

AU - Liang, Xinhua

AU - Lu, Xiaoyun

AU - Yu, Miao

AU - Cavanagh, Andrew S.

AU - Gin, Douglas L.

AU - Weimer, Alan W.

PY - 2010/3/1

Y1 - 2010/3/1

N2 - Supported type I bicontinuous cubic (QI) lyotropic liquid crystal (LLC) polymer membranes with a 3D-interconnected porous structure and an effective pore size of 0.75 nm were modified by alumina atomic layer deposition (ALD). The ALD-modified polymer membranes have an effective pore size smaller than 0.55 nm and show promise for gas separations. With 10 cycles of alumina ALD coating, the selectivity of an ALD-modified QI-phase LLC polymer membrane for H2/N2 greatly increased from 12 to 65, while the permeance of H2 decreased ∼40%. The ALD membrane modification approach described here appears to be universal and has the potential to modify other nanoporous membranes for size-selective separation.

AB - Supported type I bicontinuous cubic (QI) lyotropic liquid crystal (LLC) polymer membranes with a 3D-interconnected porous structure and an effective pore size of 0.75 nm were modified by alumina atomic layer deposition (ALD). The ALD-modified polymer membranes have an effective pore size smaller than 0.55 nm and show promise for gas separations. With 10 cycles of alumina ALD coating, the selectivity of an ALD-modified QI-phase LLC polymer membrane for H2/N2 greatly increased from 12 to 65, while the permeance of H2 decreased ∼40%. The ALD membrane modification approach described here appears to be universal and has the potential to modify other nanoporous membranes for size-selective separation.

KW - Alumina

KW - Atomic layer deposition (ALD)

KW - Lyotropic liquid crystal (LLC)

KW - Nanoporous

KW - Polymer membrane

UR - https://www.scopus.com/pages/publications/74649086900

U2 - 10.1016/j.memsci.2009.11.067

DO - 10.1016/j.memsci.2009.11.067

M3 - Article

AN - SCOPUS:74649086900

SN - 0376-7388

VL - 349

SP - 1

EP - 5

JO - Journal of Membrane Science

JF - Journal of Membrane Science

IS - 1-2

ER -

Modification of nanoporous supported lyotropic liquid crystal polymer membranes by atomic layer deposition

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Keywords

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