Adsolubilization of Fluorocarbon Alcohols into Perfluoroheptanoate Admicelles Formed on Alumina

Abstract

Sodium perfluoroheptanoate adsorption and adsolubilization of small aliphatic fluorocarbon alcohols into surface aggregates formed on alumina was investigated. Higher concentrations and increasing hydrophobicity of the adsolubilizate enhanced surfactant adsorption below the plateau region. Partitioned amounts of the fluorocarbon alcohols rose with the alcohol supernatant concentration and chain length. Aggregation numbers were estimated with the two-site adsolubilization model.

Adsorption of hydroxamate siderophores and EDTA on goethite in the presence of the surfactant sodium dodecyl sulfate

“…The strong decrease of the ratio Δ(DFOB ads )/Δ(SDS ads ) with increasing SDS concentration suggests that the effect of adsorbed SDS on the adsorption of DFOB was largest at low SDS surface coverage. Similar differences in ratios were observed for the co-adsorption of fluorocarbon alcohols [ 46 ] and 1-pentanol [ 47 ] in the presence of adsorbed surfactants on mineral surfaces. These alcohols possess hydrophobic and charged structural moieties that contribute to electrostatic and hydrophobic interactions with adsorbed surfactants, in analogy to the mechanism of siderophore adsorption discussed above.…”

Moisture absorption and wet-adhesion properties of resin transfer molded (RTM) composites containing elastomer-coated glass fibers

“…The admicellar polymerization method was originally conceived and tested for highly porous materials (e.g. alumina and silica) [25][26][27][28][29], although it has been also proven successful in forming thin lms from different monomers (e.g. styrene and styreneisoprene) over inorganic oxides of low surface area, including glass bers [30,31].…”

Interactions between Surfactants and Particles: Dispersion, Surface Modification, and Adsolubilization

“…The amount of ionic surfactants adsorbed onto oppositely charged particles increases accompanying the formation of monolayer and bilayer. For adsolubilization studies, two systems have been mainly investigated: silica-cationic surfactant systems (28,29) and alumina-anionic surfactant systems (30)(31)(32).…”