Small angle X-ray scattering studies of aggregation in supercritical fluid solutions

Technical Report · Sat Oct 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10107265· OSTI ID:10107265

Fulton, J L; Pfund, D M

Small-angle X-ray scattering (SAXS) can be used to derive structural information on molecular aggregates having sizes from 2 to 200 nm. Not only is the technique useful for probing fluid structure in pure and simple binary supercritical fluid systems, but the technique is also well suited to investigate a range of much more complex multi-molecular aggregates that form when surfactants are added to supercritical fluids. The authors describe the experimental apparatus that was constructed for these studies and the experimental approach used to collect the scattering data. They present scattering results for pure fluids and for fluids containing various types of microemulsion phases, including reverse micelle and normal micelle phases. These results demonstrate that SAXS is a powerful technique for probing various types of molecular aggregation in supercritical fluid solutions.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 10107265
• Report Number(s): PNL-SA--24552; CONF-9410114--4; ON: DE95004576
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
AGGLOMERATION
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
EXPERIMENTAL DATA
HELIUM
HYDROCARBONS
LECITHINS
MICELLAR SYSTEMS
MICROSTRUCTURE
PROPYLENE
SMALL ANGLE SCATTERING
SODIUM COMPOUNDS
SOLID CLUSTERS
SUPERCRITICAL STATE
XENON