Behavior of dinonylnaphthalene sulfonate monolayers at the air–water interface

Autor:	Kwadwo Asare Osseo-Asare, D.J Chaiko
Rok vydání:	2000
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Colloid and Surface Chemistry Sulfonate Chemistry Desorption Inorganic chemistry Extraction (chemistry) Monolayer Aqueous two-phase system Substrate (chemistry) Sulfonic acid Dissolution
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. 175:335-347
ISSN:	0927-7757
DOI:	10.1016/s0927-7757(00)00605-1
Popis:	The interfacial behavior of the sodium salt of dinonylnaphthalene sulfonic acid, a highly surface-active metal extractant, has been studied using Langmuir trough techniques. Monolayer desorption experiments were conducted at various surface pressures and substrate compositions. The rates of film contraction were found to be consistent with diffusion-controlled dissolution. Pressure–area isotherms indicated the presence of a single surface phase with a two-dimensional compressibility characteristic of a liquid-condensed film. Monolayer collapse occurred at a limiting molecular area of 67 A2. Comparison of the monolayer dissolution rates with metal extraction rates indicates the dominance of an interfacial extraction mechanism over an aqueous phase extraction mechanism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4ae785d97123944da37ad02c029bc1bb https://doi.org/10.1016/s0927-7757(00)00605-1 Zobrazit plný text záznamu Full Text from ScienceDirect