Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes

Mary Laura Lind; Byeong Heon Jeong; Arun Subramani; Xiaofei Huang; Eric M.V. Hoek

doi:10.1557/jmr.2009.0189

Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes

Mary Laura Lind, Byeong Heon Jeong, Arun Subramani, Xiaofei Huang, Eric M.V. Hoek

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

127 Scopus citations

Abstract

Hybrid zeolite-polyamide thin film nanocomposite (TFN) reverse osmosis membranes were synthesized by incorporating Linde type A (LTA)-type zeolite molecular sieve nanocrystals in the interfacial polymerization reaction used to form polyamide thin films. Nanocrystals were prepared with two different mobile cations (Na ⁺ and Ag ⁺) exchanged within the LTA crystal matrix. Incorporation of molecular sieve nanocrystals into polyamide thin films during interfacial polymerization was verified by infrared spectroscopy. Both TFN membranes exhibited higher water permeability, while maintaining similar salt rejection to pure polyamide thin film composite membranes. Nanocomposite thin films containing LTA nanocrystals in the silver form (AgA) produced a greater increase in water permeability than those in the sodium form (NaA). Furthermore, AgA-TFN membranes exhibited more hydrophilic and smooth interfaces, which appeared to inhibit adhesion of bacteria cells onto the membranes. The AgA nanocrystals exhibited significant bactericidal activity; however, when encapsulated within polyamide thin films the antimicrobial activity was significantly reduced.

Original language	English (US)
Pages (from-to)	1624-1631
Number of pages	8
Journal	Journal of Materials Research
Volume	24
Issue number	5
DOIs	https://doi.org/10.1557/jmr.2009.0189
State	Published - May 2009
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes",

abstract = "Hybrid zeolite-polyamide thin film nanocomposite (TFN) reverse osmosis membranes were synthesized by incorporating Linde type A (LTA)-type zeolite molecular sieve nanocrystals in the interfacial polymerization reaction used to form polyamide thin films. Nanocrystals were prepared with two different mobile cations (Na + and Ag +) exchanged within the LTA crystal matrix. Incorporation of molecular sieve nanocrystals into polyamide thin films during interfacial polymerization was verified by infrared spectroscopy. Both TFN membranes exhibited higher water permeability, while maintaining similar salt rejection to pure polyamide thin film composite membranes. Nanocomposite thin films containing LTA nanocrystals in the silver form (AgA) produced a greater increase in water permeability than those in the sodium form (NaA). Furthermore, AgA-TFN membranes exhibited more hydrophilic and smooth interfaces, which appeared to inhibit adhesion of bacteria cells onto the membranes. The AgA nanocrystals exhibited significant bactericidal activity; however, when encapsulated within polyamide thin films the antimicrobial activity was significantly reduced.",

author = "Lind, {Mary Laura} and Jeong, {Byeong Heon} and Arun Subramani and Xiaofei Huang and Hoek, {Eric M.V.}",

note = "Funding Information: The authors acknowledge financial support provided by the UCLA California NanoSystems Institute and NanoH2O, Inc. We are also grateful to Prof. Bruce Dunn at UCLA for providing access to the ATR-IR instrument, Prof. Chi-Ming Ho at UCLA for providing access to the AFM instrument, and Prof. Sharon Walker{\textquoteright}s lab at UC Riverside for providing access to the streaming potential analyzer. E.M.V. Hoek and B-H. Jeong have financial interest in one of the project sponsors, NanoH2O, Inc. through stock ownership and consulting agreements.",

year = "2009",

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doi = "10.1557/jmr.2009.0189",

language = "English (US)",

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AU - Lind, Mary Laura

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AU - Huang, Xiaofei

AU - Hoek, Eric M.V.

N1 - Funding Information: The authors acknowledge financial support provided by the UCLA California NanoSystems Institute and NanoH2O, Inc. We are also grateful to Prof. Bruce Dunn at UCLA for providing access to the ATR-IR instrument, Prof. Chi-Ming Ho at UCLA for providing access to the AFM instrument, and Prof. Sharon Walker’s lab at UC Riverside for providing access to the streaming potential analyzer. E.M.V. Hoek and B-H. Jeong have financial interest in one of the project sponsors, NanoH2O, Inc. through stock ownership and consulting agreements.

PY - 2009/5

Y1 - 2009/5

N2 - Hybrid zeolite-polyamide thin film nanocomposite (TFN) reverse osmosis membranes were synthesized by incorporating Linde type A (LTA)-type zeolite molecular sieve nanocrystals in the interfacial polymerization reaction used to form polyamide thin films. Nanocrystals were prepared with two different mobile cations (Na + and Ag +) exchanged within the LTA crystal matrix. Incorporation of molecular sieve nanocrystals into polyamide thin films during interfacial polymerization was verified by infrared spectroscopy. Both TFN membranes exhibited higher water permeability, while maintaining similar salt rejection to pure polyamide thin film composite membranes. Nanocomposite thin films containing LTA nanocrystals in the silver form (AgA) produced a greater increase in water permeability than those in the sodium form (NaA). Furthermore, AgA-TFN membranes exhibited more hydrophilic and smooth interfaces, which appeared to inhibit adhesion of bacteria cells onto the membranes. The AgA nanocrystals exhibited significant bactericidal activity; however, when encapsulated within polyamide thin films the antimicrobial activity was significantly reduced.

AB - Hybrid zeolite-polyamide thin film nanocomposite (TFN) reverse osmosis membranes were synthesized by incorporating Linde type A (LTA)-type zeolite molecular sieve nanocrystals in the interfacial polymerization reaction used to form polyamide thin films. Nanocrystals were prepared with two different mobile cations (Na + and Ag +) exchanged within the LTA crystal matrix. Incorporation of molecular sieve nanocrystals into polyamide thin films during interfacial polymerization was verified by infrared spectroscopy. Both TFN membranes exhibited higher water permeability, while maintaining similar salt rejection to pure polyamide thin film composite membranes. Nanocomposite thin films containing LTA nanocrystals in the silver form (AgA) produced a greater increase in water permeability than those in the sodium form (NaA). Furthermore, AgA-TFN membranes exhibited more hydrophilic and smooth interfaces, which appeared to inhibit adhesion of bacteria cells onto the membranes. The AgA nanocrystals exhibited significant bactericidal activity; however, when encapsulated within polyamide thin films the antimicrobial activity was significantly reduced.

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Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes

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