Surface Structure and Oxygen Permeation in Mixed Multibilayer Films of Hydrocarbon and Fluorocarbon Amphiphiles

Nobuyuki Higashi, Toyoki Kunitake, Tisato Kajiyama

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Multicomponent bilayers of double-chain (fluorocarbon, 2F; hydrocarbon, 2H; mixed chain, 1F1H) ammonium amphiphiles were immobilized on Millipore membranes as composite films with poly(vinyl alcohol). Differential scanning calorimetry and ESCA indicated that the hydrocarbon and fluorocarbon components form separated domains and that the fluorocarbon component is concentrated near the film surface. Permeation of 02 and N2 through these films was examined by the high-vacuum method. The separation factor (Po2/PN2 = 2.0–2.8) was apparently determined by the surface monolayer formed from the fluorocarbon (2F) amphiphile, without regard to the hydrocarbon (2H) content. The permeability coefficient (P) was enhanced by the presence of the fluid domain of the liquid-crystalline hydrocarbon (2H) bilayer, and a 100 times jump in P was observed for a composite film of 2F/2H/1F1H (1:7:1) and PVA near the phase transition temperature of the hydrocarbon bilayer.

Original languageEnglish
Pages (from-to)1362-1366
Number of pages5
JournalMacromolecules
Volume19
Issue number5
DOIs
Publication statusPublished - Jan 1 1986

Fingerprint

Fluorocarbons
Amphiphiles
Hydrocarbons
Permeation
Surface structure
Oxygen
Composite films
Hydraulic conductivity
Ammonium Compounds
Superconducting transition temperature
Differential scanning calorimetry
Monolayers
Alcohols
Phase transitions
Vacuum
Crystalline materials
Membranes
Fluids
Liquids

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Surface Structure and Oxygen Permeation in Mixed Multibilayer Films of Hydrocarbon and Fluorocarbon Amphiphiles. / Higashi, Nobuyuki; Kunitake, Toyoki; Kajiyama, Tisato.

In: Macromolecules, Vol. 19, No. 5, 01.01.1986, p. 1362-1366.

Research output: Contribution to journalArticle

Higashi, Nobuyuki ; Kunitake, Toyoki ; Kajiyama, Tisato. / Surface Structure and Oxygen Permeation in Mixed Multibilayer Films of Hydrocarbon and Fluorocarbon Amphiphiles. In: Macromolecules. 1986 ; Vol. 19, No. 5. pp. 1362-1366.
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