Phase separation and crystallization in mixed monolayers of FC and HC surfactants

Selected physicochemical aspects of poly- and perfluoroalkylated substances relevant to performance, environment and sustainability—Part one

“…C 8 F 17 COOH (Zhu et al, 1999) or C 10 F 21 COOH (Kato et al, 1998), or phosphocholine and dimorpholinophosphate derivatives) can spontaneously form tightly packed, thin, insoluble films (Langmuir films) on surfaces and at interfaces. Mixtures of C 8 F 17 COOH with the hydrocarbon sulfonate C 18 F 37 SO 3 Na form well separated monolayers when transferred on mica.…”

“…Highly stable monolayers have been obtained from C 8 F 17 COOH (PFNA) (Zhu et al, 1999), C 10 F 21 COOH (PFUnDecA) (Kato et al, 1998), or C 10 F 21 (CH 2 ) 2 OH (10:2 FTOH) (Takiue and Vollhardt, 2002). By contrast, a minimum of 13 CH 2 groups are needed to obtain stable monolayers of hydrocarbon acids or alcohols.…”

Solvent effect on the aggregate of fluorinated gemini surfactant at silica surface

“…In the solution mixed with fluorinated and hydrogenated amphiphiles, two kinds of micelles coexist and each kind is mainly composed of one kind of surfactant [6]. On the other hand, phase separation occurs in the mixed LB films of fluorinated and hydrogenated components [30,31]. It is shown that the limited miscibility may push the fluorinated and hydrogenated amphiphiles to change their location.…”

Self-Organization of Mixtures of Fluorocarbon and Hydrocarbon Amphiphilic Thiolates on the Surface of Gold Nanoparticles

“…The two types of lipids are immiscible, and domains of individual lipids are formed from the lipid mixture instead of two different liposome populations. Since then, many studies have provided evidence of the phase segregation of compounds with H - and F - chains. − AFM investigations of model membranes composed of mixtures of F - and H - phospholipids reveal an intricate, composition-dependent domain structure consisting of 50 nm stripes interspersed between 1 μm sized domains . The ability of F - compounds to spontaneous self-assembly is general and is documented to occur on different materials.…”