Phase Behavior and Formation of Microemulsions in Water/A−B−A Block Copolymer (Polyhydroxystearic Acid−Polyetylene Oxide−Polyhydroxystearic Acid)/1,2-Alkanediol/Isopropyl Myristate Systems
| Autor: | Th.F. Tadros, Conxita Solans, M. Plaza, Ramon Pons |
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| Rok vydání: | 2002 |
| Předmět: |
Ternary numeral system
Ethylene oxide Oxide Surfaces and Interfaces Condensed Matter Physics chemistry.chemical_compound chemistry Pulmonary surfactant Phase (matter) Electrochemistry Copolymer bacteria Organic chemistry General Materials Science Microemulsion Isopropyl myristate Spectroscopy Nuclear chemistry |
| Zdroj: | Langmuir. 18:1077-1081 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la011167o |
| Popis: | Phase diagrams of the ternary system water/poly(12-hydroxystearic acid)−poly(ethylene oxide)−poly(12-hydroxystearic acid) (PHS−PEO−PHS)/isopropyl myristate and the quaternary system water/PHS−PEO−PHS/1,2-alkanediol/isopropyl myristate were investigated at 25 °C. The alkanediols tested in this work are 1,2-hexanediol and 1,2-octanediol. The different phases formed have been examined by optical (phase contrast and polarizing) microscopy. The nature of the continuous media has been determined by conductivity. Particular attention was paid to the L2 (water-in-oil micoremulsion). The amount of water solubilized in this region increases as the surfactant concentration increases. The minimum content of polymeric surfactant and cosurfactant for maximum water solubilization is about 37%. The present investigation has also shown the relation between the oil polarity and the maximum water content that can be solubilized in microemulsions. |
| Databáze: | OpenAIRE |
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