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Highly water dilutable microemulsions: a structural study
Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, Athens, Greece; MTM, Faculty of Science and Engineering, Örebro University, Örebro, Sweden.
Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, Athens, Greece; MTM, Faculty of Science and Engineering, Örebro University, Örebro, Sweden.
Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, Athens, Greece.
2015 (English)In: Colloid and Polymer Science, ISSN 0303-402X, E-ISSN 1435-1536, Vol. 293, no 4, 1111-1119 p.Article in journal (Refereed) Published
Abstract [en]

Highly aqueous dilutable microemulsions based on biocompatible materials were developed and structurally investigated. Phase diagrams were constructed for systems consisting of nonionic Tweens (20, 40, and blends of them), R-(+)-limonene, ethanol, water, and propylene glycol. The obtained phase diagrams reveal the formation of highly aqueous dilutable microemulsions along certain dilution lines in the surfactant-rich region. Two phase transitions of the investigated systems were detected by conductivity measurements, from water in oil (w/o) to bicontinuous and to the oil in water (o/w), without phase separation. Interfacial properties and the dynamic structure of the surfactant monolayer were studied by electron paramagnetic resonance spectroscopy. It was observed that the mobility of the spin probe and the rigidity of the membrane are affected by increasing aqueous content and by the type of surfactant. Dynamic light scattering (DLS) measurements were performed in o/w microemulsions for different aqueous content, and oil droplet diameters in the range of 8.2 to 17.4 nm were observed.

Place, publisher, year, edition, pages
2015. Vol. 293, no 4, 1111-1119 p.
Keyword [en]
Biocompatible microemulsions; DLS; Electrical conductivity; EPR; Limonene; Tweens
National Category
Polymer Chemistry
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-44542DOI: 10.1007/s00396-014-3496-1ISI: 000352074200012OAI: oai:DiVA.org:oru-44542DiVA: diva2:810062
Note

Funding Agencies:

Greek Secretary of Research and Technology

VIORYL SA, Greece 09-SigmaY-42-699

Available from: 2015-05-06 Created: 2015-05-06 Last updated: 2015-05-06Bibliographically approved

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