Preparation of Fluorocarbon LB Films and Oxygen Enrichment

Nobuyuki Higashi, Toyoki Kunitake, Tisato Kajiyama

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Fluorocarbon amphiphiles (C3FC2COOH, 2C3FC3-de-C2N+) formed surface monolayers at 21°C on aqueous BaCl2 (for C3FC2COOH) and on pure water (for 2C3FC3-de-C2N+). These monolayers could be deposited on solid substrates covered by layers of stearic acid, only as a single layer for the Ba salt of C3FC2COOH and up to ten layers (the Z type) for 2C3FC3-de-C2N+. Direct deposition without layers of stearic acid was not possible. The gas flux of oxygen (RO2) and nitrogen (RN2) through these multilayer membranes was drastically reduced at certain thicknesses of the layer of stearic acid, and the value of RO2/RN2 concomitantly became larger than unity. RO2/RN2 depended on the number of fluorocarbon layers, and the maximum value of RO2/RN2 was 1.7 (RO2=7 × 10-5 cm3(STP)cm-2.s-1.cmHg-1).

Original languageEnglish
Pages (from-to)761-766
Number of pages6
JournalKOBUNSHI RONBUNSHU
Volume43
Issue number11
DOIs
Publication statusPublished - Jan 1 1986

Fingerprint

fluorocarbon
Fluorocarbons
Stearic acid
Langmuir Blodgett films
Oxygen
oxygen
Monolayers
Amphiphiles
acid
Multilayers
Nitrogen
Salts
Gases
Fluxes
Membranes
Water
twenty first century
Substrates
stearic acid
membrane

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Materials Science (miscellaneous)
  • Environmental Science(all)
  • Polymers and Plastics

Cite this

Preparation of Fluorocarbon LB Films and Oxygen Enrichment. / Higashi, Nobuyuki; Kunitake, Toyoki; Kajiyama, Tisato.

In: KOBUNSHI RONBUNSHU, Vol. 43, No. 11, 01.01.1986, p. 761-766.

Research output: Contribution to journalArticle

Higashi, N, Kunitake, T & Kajiyama, T 1986, 'Preparation of Fluorocarbon LB Films and Oxygen Enrichment', KOBUNSHI RONBUNSHU, vol. 43, no. 11, pp. 761-766. https://doi.org/10.1295/koron.43.761
Higashi, Nobuyuki ; Kunitake, Toyoki ; Kajiyama, Tisato. / Preparation of Fluorocarbon LB Films and Oxygen Enrichment. In: KOBUNSHI RONBUNSHU. 1986 ; Vol. 43, No. 11. pp. 761-766.
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AB - Fluorocarbon amphiphiles (C3FC2COOH, 2C3FC3-de-C2N+) formed surface monolayers at 21°C on aqueous BaCl2 (for C3FC2COOH) and on pure water (for 2C3FC3-de-C2N+). These monolayers could be deposited on solid substrates covered by layers of stearic acid, only as a single layer for the Ba salt of C3FC2COOH and up to ten layers (the Z type) for 2C3FC3-de-C2N+. Direct deposition without layers of stearic acid was not possible. The gas flux of oxygen (RO2) and nitrogen (RN2) through these multilayer membranes was drastically reduced at certain thicknesses of the layer of stearic acid, and the value of RO2/RN2 concomitantly became larger than unity. RO2/RN2 depended on the number of fluorocarbon layers, and the maximum value of RO2/RN2 was 1.7 (RO2=7 × 10-5 cm3(STP)cm-2.s-1.cmHg-1).

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