Universal Surfactant for Water, Oils, and CO2
| Autor: | Robert Dyer, Azmi Mohamed, Sandrine Nave, Stephen Cummings, Masanobu Sagisaka, Julian Eastoe, Swee Yee Chin, Richard K. Heenan, Sarah E. Rogers, Laura Hudson, Kieran Trickett |
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| Rok vydání: | 2010 |
| Předmět: |
Alkanesulfonates
Alkane chemistry.chemical_classification Heptane Surface Properties Chemistry Water Surfaces and Interfaces Carbon Dioxide Condensed Matter Physics Micelle Small-angle neutron scattering Surface energy Solvent Surface tension Surface-Active Agents chemistry.chemical_compound Pulmonary surfactant Chemical engineering Electrochemistry Organic chemistry General Materials Science Particle Size Oils Spectroscopy |
| Zdroj: | Langmuir. 26:13861-13866 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la102303q |
| Popis: | A trichain anionic surfactant sodium 1,4-bis(neopentyloxy)-3-(neopentyloxycarbonyl)-1,4-dioxobutane-2-sulfonate (TC14) is shown to aggregate in three different types of solvent: water, heptane, and liquid CO(2). Small-angle neutron scattering (SANS) has been used to characterize the surfactant aggregates in water, heptane, and dense CO(2). Surface tension measurements, and analyses, show that the addition of a third branched chain to the surfactant structural template is critical for sufficiently lowering the surface energy, tipping the balance between a CO(2)-incompatible surfactant (AOT) and CO(2)-philic compounds that will aggregate to form micelles in dense CO(2) (TC14). These results highlight TC14 as one of the most adaptable and useful surfactants discovered to date, being compatible with a wide range of solvent types from high dielectric polar solvent water to alkanes with low dielectrics and even being active in the uncooperative and challenging solvent environment of liquid CO(2). |
| Databáze: | OpenAIRE |
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