Similarity in phase diagrams between ionic and nonionic surfactant solutions at constant temperature

Journal Article · Sun Mar 01 04:00:00 EST 1981 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(81)90187-9· OSTI ID:7023613

Shinoda, K; Kunieda, H; Obi, N; Friberg, S E

The nonionic surfactants of the polyoxyethylene alkyl (aryl) ether type show hydrophilic properties at low temperatures and gradually change to lipophilic properties at high temperatures. The reason for this is found in a reduced interaction between the hydrophilic moiety of nonionic surfactant and water with increased temperature. This means that the hydrophile-lipophile properties of nonionic surfactants will be balanced at a certain temperature for a given system. Above this temperature the surfactant is oleophilic and soluble in the given oil and below it hydrophilic and mainly soluble in water. Emulsion type changes from an O/W to a W/O type at this temperature. The temperature is called phase inversion temperature (PIT) in emulsion of HLB temperature, because the hydrophile-lipophile balance (HBL) of a nonionic surfactant in the given system just balances at this temperature. The solubilization of oil (or water) in aqueous (or nonaqueous) surfactant solution is large close to the PIT.

• OSTI ID: 7023613
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 80:1; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
COLLOIDS
DIAGRAMS
DISPERSIONS
EMULSIONS
GLYCOLS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
POLYETHYLENE GLYCOLS
POLYMERS
SOLUBILITY
SURFACTANTS
TEMPERATURE DEPENDENCE
TEMPERATURE EFFECTS