Phase behavior and molecular motion of aerosol OT in liquid-crystalline phases with water

DSC Analysis of Surfactant-Based Microstructures

“…In AOT-water systems, the disappearance of interfacial water peaks at 80 wt% AOT is accompanied by a change in liquid crystalline structure; the lamellar mesophase is replaced by an inverse hexagonal mesophase [201][202][203]. The presence of different types of water in the AOT-water system at room temperature was corroborated by FT-IR spectroscopy.…”

“…In some biological gels, such as bovine corneas, up to 30% of the water does not freeze [193,194], according to DSC analysis. The disappearance of the melting enthalpy of water coincides with phase changes, e.g., in the AOT-water system, where a transition occurs from the lamellar to the inverse hexagonal phase [201][202][203]. This is the reference temperature, accepted by numerous researchers [195][196][197][198][199][200], where the water content that achieves complete freezing is termed free water and the remaining unfrozen water is termed bound water.…”

Preparation and Application in Drug Storage and Delivery of Agarose Nanoparticles

“…The first population can be ascribed to micelles of the aerosol-OT used in the stabilization of the microemulsion. Aerosol-OT is also soluble in water; thus, it can be expected that a part of it can remain as free surfactant and above the critical micelle concentration (cmc) as micelles upon redispersion [37]. The second population is associated with the obtained agarose particles which present an average d app h at around 150 nm.…”

Dissolution Rates of Surfactants

“…15 [14]. It exhibits a miscibility gap between the L 1 and L α phases and indicates that intermediate lamellar L α and viscous isotropic V 1 phases should form when pure AOT, which is a reverse hexagonal phase H 2 (similar to H 1 but with long rodlike reverse micelles), is brought into contact with water without stirring.…”