Barrier membranes of self-assembled lamellar poly(lactide-isoprene-lactide) triblock copolymers

Nancy K. Lape; Huiming Mao; Dean Camper; Marc A. Hillmyer; E. L. Cussler

doi:10.1016/j.memsci.2004.11.035

Barrier membranes of self-assembled lamellar poly(lactide-isoprene-lactide) triblock copolymers

Nancy K. Lape, Huiming Mao, Dean Camper, Marc A. Hillmyer, E. L. Cussler

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

11 Scopus citations

Abstract

Permeation across thin films can be retarded when the films contain aligned flakes of a less permeable material, but aligning these flakes can be difficult. In this research, we measure transport across less permeable flakes which self-assemble from a triblock copolymer. Elasticity is most influenced by an isoprene block but permeability is dominated by a lactide block. The permeability of this lamellar composite for helium, oxygen, and nitrogen is about 20% smaller than that expected from estimates based on resistances in series, implying good alignment. However, the permeability of the triblock is still around 10^-7 cm²/s, so that better barriers will require different polymers.

Original language	English (US)
Pages (from-to)	1-9
Number of pages	9
Journal	Journal of Membrane Science
Volume	259
Issue number	1-2
DOIs	https://doi.org/10.1016/j.memsci.2004.11.035
State	Published - Aug 15 2005

Bibliographical note

Funding Information:
The authors are grateful to Professor Richard D. Noble for help in the polyisoprene permeability experiments. Nancy K. Lape held a National Science Foundation Graduate Research Fellowship. This work was largely supported by the Air Force Office of Scientific Research (grant F49620-01-1-0333). Other support came from the Department of Energy (grant DE-FG07-02ER63509), the Petroleum Research Fund (grant 39083-AC9), the David and Lucile Packard Foundation, and the National Science Foundation (grant CTS 0322882).

Keywords

Barrier films
Permeability
Triblock copolymer

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10.1016/j.memsci.2004.11.035

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abstract = "Permeation across thin films can be retarded when the films contain aligned flakes of a less permeable material, but aligning these flakes can be difficult. In this research, we measure transport across less permeable flakes which self-assemble from a triblock copolymer. Elasticity is most influenced by an isoprene block but permeability is dominated by a lactide block. The permeability of this lamellar composite for helium, oxygen, and nitrogen is about 20% smaller than that expected from estimates based on resistances in series, implying good alignment. However, the permeability of the triblock is still around 10-7 cm2/s, so that better barriers will require different polymers.",

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note = "Funding Information: The authors are grateful to Professor Richard D. Noble for help in the polyisoprene permeability experiments. Nancy K. Lape held a National Science Foundation Graduate Research Fellowship. This work was largely supported by the Air Force Office of Scientific Research (grant F49620-01-1-0333). Other support came from the Department of Energy (grant DE-FG07-02ER63509), the Petroleum Research Fund (grant 39083-AC9), the David and Lucile Packard Foundation, and the National Science Foundation (grant CTS 0322882). ",

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AU - Lape, Nancy K.

AU - Mao, Huiming

AU - Camper, Dean

AU - Hillmyer, Marc A.

AU - Cussler, E. L.

N1 - Funding Information: The authors are grateful to Professor Richard D. Noble for help in the polyisoprene permeability experiments. Nancy K. Lape held a National Science Foundation Graduate Research Fellowship. This work was largely supported by the Air Force Office of Scientific Research (grant F49620-01-1-0333). Other support came from the Department of Energy (grant DE-FG07-02ER63509), the Petroleum Research Fund (grant 39083-AC9), the David and Lucile Packard Foundation, and the National Science Foundation (grant CTS 0322882).

PY - 2005/8/15

Y1 - 2005/8/15

N2 - Permeation across thin films can be retarded when the films contain aligned flakes of a less permeable material, but aligning these flakes can be difficult. In this research, we measure transport across less permeable flakes which self-assemble from a triblock copolymer. Elasticity is most influenced by an isoprene block but permeability is dominated by a lactide block. The permeability of this lamellar composite for helium, oxygen, and nitrogen is about 20% smaller than that expected from estimates based on resistances in series, implying good alignment. However, the permeability of the triblock is still around 10-7 cm2/s, so that better barriers will require different polymers.

AB - Permeation across thin films can be retarded when the films contain aligned flakes of a less permeable material, but aligning these flakes can be difficult. In this research, we measure transport across less permeable flakes which self-assemble from a triblock copolymer. Elasticity is most influenced by an isoprene block but permeability is dominated by a lactide block. The permeability of this lamellar composite for helium, oxygen, and nitrogen is about 20% smaller than that expected from estimates based on resistances in series, implying good alignment. However, the permeability of the triblock is still around 10-7 cm2/s, so that better barriers will require different polymers.

KW - Barrier films

KW - Permeability

KW - Triblock copolymer

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Barrier membranes of self-assembled lamellar poly(lactide-isoprene-lactide) triblock copolymers

Abstract

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