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Three-component Langmuir-Blodgett films with a controllable degree of polarity
RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.
1994 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 10, s. 1225-1234Artikel i tidskrift (Refereegranskat)
Abstract [en]

Two different series of mixed Langmuir-Blodgett (LB) films with a controllable degree of polarity, deposited on mica, have been studied by wetting and surface force techniques. Both series contain of 50% eicosylamine (EA). Films of one series consist of EA, arachidic acid and docosanedioic acid, while those of the other consist of EA, 1-eicosanol and 1,22-docosanediol. Carboxylic acid groups give lower contact angles than hydroxy groups. Concerning the stability of the LB films in aqueous solutions, repeated exposure to a three-phase line and high salt solutions were found to cause breakdown. Surface force measurements on carboxylic acid-containing films show that films with a 0% (contact angle = 113°) and 25% (contact angle ≈ 90°) content of diacid interact with a long-range (hydrophobic) attraction across water. No similar long-range attraction is observed for the 50% case (contact angle ≈ 65°). Surface force measurements also detected instabilities and imperfections of the films.

Ort, förlag, år, upplaga, sidor
1994. Vol. 10, s. 1225-1234
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URN: urn:nbn:se:ri:diva-27276OAI: oai:DiVA.org:ri-27276DiVA, id: diva2:1054280
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A850Tillgänglig från: 2016-12-08 Skapad: 2016-12-08 Senast uppdaterad: 2020-12-01Bibliografiskt granskad

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