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Simultaneous Conductivity and Viscosity Measurements as a Technique To Track Emulsion Inversion by the Phase-Inversion-Temperature Method
Laboratorio FIRP, Ingeniería Química, Universidad de Los Andes, Avenida Don Tulio Febres, Mérida .
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2004 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 20, nr 6, s. 2134-2140Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Two kinds of transitions can occur when an emulsified water-oil-ethoxylated nonionic surfactant system is cooled under const. stirring. At a water-oil ratio close to unity, a transitional inversion takes place from a water-in-oil (W/O) to an oil-in-water (O/W) morphol. according to the so-called phase-inversion-temp. method. At a high water content, a multiple W/O/W emulsion changes to a simple O/W emulsion. The continuous monitoring of both the emulsion cond. and viscosity allows the identification of several phenomena that take place during the temp. decrease. In all cases, a viscosity max. is found on each side of the three-phase behavior temp. interval and correlates with the attainment of extremely fine emulsions, where the best compromise between a low-tension and a not-too-unstable emulsion is reached. The studied system contains Polysorbate 85, a light alkane cut oil, and a sodium chloride brine. All transitions are interpreted in the framework of the formulation-compn. bidimensional map.

Ort, förlag, år, upplaga, sidor
2004. Vol. 20, nr 6, s. 2134-2140
Nyckelord [en]
Surfactants (nonionic, simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method), Kerosene Role: PRP (Properties) (oil phase contg., simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method), Emulsions, Ionic conductivity, Viscosity (simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method), nonionic surfactant emulsion inversion cond viscosity
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Fysikalisk kemi
Identifikatorer
URN: urn:nbn:se:kth:diva-58970DOI: 10.1021/la035334rISI: 000220159800017OAI: oai:DiVA.org:kth-58970DiVA, id: diva2:486608
Anmärkning
CAN 140:305791 46-3 Surface Active Agents and Detergents Centre de Genie Chimique des Milieux Rheologiquement Complexes (GEMICO),Ecole Nationale Superieure des Industries Chimiques (ENSIC),Nancy,Fr. Journal 0743-7463 written in English. 67-63-0 (2-Propanol) Role: PRP (Properties) (oil phase contg.; simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method); 9005-70-3 (Tween 85) Role: PRP (Properties) (surfactant; simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method); 7647-14-5 (Sodium chloride) Role: PRP (Properties) (water phase contg.; simultaneous cond. and viscosity measurements as technique to track emulsion inversion by phase-inversion-temp. method). QC 20120201Tillgänglig från: 2012-01-30 Skapad: 2012-01-09 Senast uppdaterad: 2017-12-08Bibliografiskt granskad

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