Synthesis of phosphate-type fluorocarbon–hydrocarbon hybrid surfactants and their adsorption onto calcium hydroxyapatite

Unique liquid crystal behavior in water of anionic fluorocarbon–hydrocarbon hybrid surfactants containing oxyethylene units

“…Most ionic fluorocarbon-hydrocarbon hybrid surfactants reported previously employed a stimuli-insensitive group (e.g., n-alkyl) as one of the hybrid-structured tails [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41], although only two ionic hybrid surfactants had a stimuli-sensitive group; one had a redox-responsive ferrocene group at the terminal end of nalkyl tail [42]. Then, there is no information on the interfacial properties and liquid crystal behavior for an ionic hybrid surfactant having temperature-sensitive oxyethylene units in one hybridstructured alkyl tail.…”

Periodic Formation/Breakdown of Lamellar Aggregates with Anionic Cyanobiphenyl Surfactants

“…Most ionic fluorocarbon–hydrocarbon hybrid surfactants reported previously employed stimuli-insensitive groups (e.g., n -alkyl chains) in the hybrid tails. − In the literature, only two ionic hybrid surfactants can be found with stimulus-sensitive groups; one of these has redox-responsive ferrocene groups at the n -alkyl tail termini . The other, from an earlier study of 8F-B2ES, led to new molecular designs able to generate temperature-sensitive interfacial properties and liquid crystal behavior, owing to the presence of oxyethylene units.…”

Synthesis of a novel type of hybrid fluorocarbon ionic surfactants containing polyoxyethlene chain

“…Such surfactants are very effective in lowering the surface tension and interfacial tension so that they often have unique properties and potential applications [1][2][3][4][5][6][7], such as simultaneous emulsify-cation of hydrocarbon oil/ fluorocarbon oil/water [1]; formation of small micelles with unusually long lifetime [2]; formation of water/supercritical carbon dioxide type microemulsions [3]; spontaneous vesicle formation [4]; thermoresponsive viscoelasticity of the surfactant solution [5]; flocculation-redispersion ability for dispersed magnetite particles in water [6] and new dental reagents for oral hygiene [7].…”

“…Since Guo et al synthesized the first sulfate hybrid surfactant in 1992 [8], hybrid surfactants have gathered the attention of researchers, for instance, there have been some investigations of sulfonate and phosphate anionic hybrid fluorocarbon surfactants [1][2][3][4][5][6][7], hybrid hydrocarbon-fluorocarbon cationic surfactants [9] and hybrid nonionic surfactants bearing oxyethylene hydrophilic chains [10]. Recently, we have synthesized triethylalkylammonium perfluorooctanesulfonate (APFOS) hybrid ionic surfactants [11], but these surfactants tend to exhibit a low solubility in water as the N-alkyl chain length increases over 16.…”