Small-Angle Neutron Scattering Studies on an Idealized Diesel Biofuel Platform
| Autor: | Kristen L. Aramthanapon, Mark A. Webb, Timothy J. Riiff, William J. Orts |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Hydrodynamic radius
Materials science Scattering 020209 energy General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology Neutron scattering Small-angle neutron scattering Micelle Crystallography Fuel Technology 020401 chemical engineering Dynamic light scattering Pulmonary surfactant Chemical physics 0202 electrical engineering electronic engineering information engineering SPHERES 0204 chemical engineering |
| Zdroj: | Energy & Fuels. 31:3995-4002 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.6b03185 |
| Popis: | Dynamic light scattering (DLS) and small-angle neutron scattering (SANS) were used to characterize the microstructure of a reverse micelle system consisting of ethanol, water, and surfactant in n-hexadecanes as an analytical framework to understand the structure and stability of a model platform for biofuel formulations. Best-fit modeling of SANS scattering data suggested that the micelles are better described as ellipsoids rather than spheres, with the (geometric) diameters of stable micelles increasing from 2.4 to 7.5 nm as a function of the increasing water content as well as surfactant concentration. Fitted diameters from DLS measurements followed similar trends, but DLS measurements overestimated the interior of the micelles by roughly 2–3 nm because DLS measurements are based on the full hydrodynamic radius, including the surfactant shell. SANS only detects the nanopool interior, a significant advantage. The choice of surfactant altered the stability at temperatures below 10 °C, but the micelles rea... |
| Databáze: | OpenAIRE |
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