Plasma polymerized membranes and gas permeability. II
Article first published online: 9 MAR 2003
Copyright © 1986 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 31, Issue 7, pages 1999–2006, 20 May 1986
How to Cite
Sakata, J., Yamamoto, M. and Hirai, M. (1986), Plasma polymerized membranes and gas permeability. II. J. Appl. Polym. Sci., 31: 1999–2006. doi: 10.1002/app.1986.070310704
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 2 JUL 1985
- Manuscript Received: 18 SEP 1984
Thin films were deposited onto porous substrates by plasma polymerization using three kinds of organosilicic compounds, tetramethylsilane (TMS), hexamethyldisiloxane (M2), and octamethylcyclotetrasiloxane (D4). Those composite membranes showed different characteristics of gas permeability. When D4 was plasma-deposited onto a porous substrate, the composites membrane showed the highest oxygen permeability and the lowest oxygen-to-nitrogen permeability ratio. The composite membrane prepared from TMS showed the permeability characteristics opposite to the membrane obtained from D4. Infrared spectrum of the polymer from D4 resembles that of dimethylpolysiloxane. The plasma polymers from TMS and M2 showed different profiles in SiO absorption bands in the range 1100–1000 cm-1 or in absorption bands of SiCH3 groups in the range 850–750 cm-1 from respective monomers. X-ray photoelectron spectroscopic observation indicated that all the plasma polymers contained more than two species of Si atom with different oxidation states. The greater part of Si atoms in plasma polymers took the same oxidation states in corresponding monomer. The gas permeability characteristics were closely related to the oxidation states of Si atom in the plasma polymers.