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Swelling of ultrathin crosslinked polyamide water desalination membranes

Authors

  • Edwin P. Chan,

    Corresponding author
    1. Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899
    • Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899
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  • Allison P. Young,

    1. Department of Forensic Science and Chemistry, University of New Haven, West Haven, Connecticut 06516
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  • Jung-Hyun Lee,

    1. Center for Materials Architecturing, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Republic of Korea
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  • Jun Young Chung,

    1. Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899
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  • Christopher M. Stafford

    1. Polymers Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899
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  • This article is a US Government work, and, as such, is in the public domain in the United States of America.

Abstract

We study the water swelling behavior of semiaromatic crosslinked polyamide (PA) ultrathin films to characterize the network properties of the polymer. Specifically, we use X-ray reflectivity to measure film thickness increase and polymer density decrease of the PA films due to swelling. With the aid of a modified Flory–Rehner theory used to describe the constrained swelling behavior of polymer networks, we are able to extract the Flory interaction parameter and the monomer units between crosslinks by performing the swelling experiments at different levels of hydration. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2013

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