Influence of secondary and tertiary amines on the stability of stearic acid monolayers

Autor:	Marit-Helen Ese, Johan Sjo¨blom
Rok vydání:	1997
Předmět:	chemistry.chemical_classification Langmuir Chemistry Penetration (firestop) Tributylamine Ion chemistry.chemical_compound Colloid and Surface Chemistry Hydrocarbon Monolayer Polymer chemistry Organic chemistry Moiety lipids (amino acids peptides and proteins) Stearic acid
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. :479-489
ISSN:	0927-7757
Popis:	Acid-base interactions and the influence of multivalent cations on the stability of stearic acid monolayers were studied by means of the Langmuir technique. The surface activity of secondary and tertiary amines increases with increasing size of the hydrocarbon moiety. The Langmuir study revealed that the dibutylamine-stearic acid complex is water-soluble, whereas the complexes formed when stearic acid interacts with tributylamine, dihexylamine, trihexylamine or trioctylamine are not sufficiently polar to be water-soluble. The presence of Ca2+ ions in the subphase results in a reduced penetration of the monolayer. Relaxation measurements show that salt in the bulk solution stabilizes the monolayer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8597ce616b653b475db2d039ad87c528 https://doi.org/10.1016/s0927-7757(96)03833-2 Zobrazit plný text záznamu Full Text from ScienceDirect