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Ultrafiltration Membranes Composed of Highly Cross-Linked Cationic Polymer Gel: the Network Structure and Superior Separation Performance

Authors

  • Qifeng Wang,

    1. Organic Nanomaterials Center, National Institute for Materials Science, 1–1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
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  • Sadaki Samitsu,

    1. Organic Nanomaterials Center, National Institute for Materials Science, 1–1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
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  • Izumi Ichinose

    Corresponding author
    1. Organic Nanomaterials Center, National Institute for Materials Science, 1–1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
    2. Japan Science and Technology Agency, CREST, 5 Sanbancho, Chiyoda–ku, Tokyo 102-0075, Japan
    • Organic Nanomaterials Center, National Institute for Materials Science, 1–1 Namiki, Tsukuba, Ibaraki 305–0044, Japan.
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Abstract

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Ultrafiltration membranes with a thickness of several tens of nanometers are prepared from cross-linked poly(4-vinylpyridine) gel using a flat and smooth sacrificial layer of metal hydroxide nanostrands. The membranes have a network structure with pores sizes of approximately 2.0 ± 1.0 nm and can separate small proteins and organic dyes at a surprisingly high filtration rate.

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