Gas Permeation Properties of Asymmetric Polyimide Membranes Made by Ion–beam Irradiation

Authors

  • A. Sannomiya Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192–0397, Japan
  • M. Iwase Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192–0397, Japan
  • S. Nagaoka Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192–0397, Japan
  • Y. Suzuki The Institute of Physical and Chemical Research, 2–1 Hirosawa, Wako, Saitama 351–0198, Japan
  • M. Iwaki The Institute of Physical and Chemical Research, 2–1 Hirosawa, Wako, Saitama 351–0198, Japan
  • H. Kawakami Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192–0397, Japan

DOI:

https://doi.org/10.11113/amst.v1i1.30

Abstract

In this study, the gas permeance and selectivity of the asymmetric polyimide membrane with skin layer carbonized by He ions irradiation were measured using a high vacuum apparatus with a Baratron absolute pressure gauge at 76 cmHg and 35°C. Particutarly, we focused on the effects of the depth profile of the energy loss for the irradiating He ions in the skin layer on the gas permeation properties of the asymmetric membranes. Irradiation depth is gauged through the energy loss profile of the irradiating ions. The nature of the carbonised layer was investigated using AFM and ATR–FTIR. We demonstrated that the PO2 of the He+–irradiated membranes increased with the skin layer thickness and that the depth of the irradiating ions in the skin layer had a significant influence on the gas permeability and selectivity of the asymmetric membrane.

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Published

2017-11-15

How to Cite

Sannomiya, A., Iwase, M., Nagaoka, S., Suzuki, Y., Iwaki, M., & Kawakami, H. (2017). Gas Permeation Properties of Asymmetric Polyimide Membranes Made by Ion–beam Irradiation. Journal of Applied Membrane Science &Amp; Technology, 1(1). https://doi.org/10.11113/amst.v1i1.30

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