Protic ionic liquids: Solvents with tunable phase behavior and physicochemical properties

Article Abstract:

The phase behavior, including glass, devitrification, solid crystal melting, and liquid boiling transitions and physiochemical properties, including density, refractive index, viscosity, conductivity and air-liquid surface tension, of a series of 25 protic ionic liquids (PIL) and protic fused salts are described along with structure-property comparisons. The results have shown that simple structural modifications provide a mechanism to manipulate the temperature at which phase transitions occur and to specifically tailor physicochemical properties for potential end-use applications.

Stoichiometry, Solvents, Alkyl groups

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Nonionic urea surfactants: Formation of inverse hexagonal lyotropic liquid crystalline phases by introducing hydrocarbon chain unsaturation

Article Abstract:

The homo-interaction between urea moieties residing in close proximity to each other generally resulting in very strong intermolecular hydrogen bonding is presented. The findings reveal that the occurrence of an inverse hexagonal phase in nonionic urea surfactant-water systems is rationalized in terms of both local molecular and global self-assembled aggregate packing constraints.

Electric properties, Hydrocarbons, Chemical reactions

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Formation of amphiphile self-assembly phases in protic ionic liquids

Article Abstract:

The protic ionic liquids (PILs) are analyzed for the formation of lyotropic liquid crystalline phases that support the self-assembly of the nonionic surfactants myverol 18-99K and phytantriol. The PILs are found to possess a wide range of solvent properties.

Surface active agents, Surface Active Agent Manufacturing, Nonionic Surfactants, Report

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