Phase behavior and microstructure of nonaqueous microemulsions. 2

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Langmuir

DOI:https://doi.org/10.1021/la00003a019· OSTI ID:41630

Martino, A ^[1]; Kaler, E W ^[2]

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1. Sandia National Lab., Albuquerque, NM (United States)
2. Univ. of Delaware, Newark, DE (United States)

The microstructure of nonaqueous microemulsions formed with propylene glycol, glycerol, three different alkanes, and pentaethylene glycol mono-n-dodecyl ether (C{sub 12}E{sub 6}) is probed with NMR self-diffusion measurements and small angle neutron scattering (SANS). At low oil concentrations, both NMR self-diffusion and SANS results can be modeled in terms of a microstructure of ellipsoidal oil-rich droplets with only excluded volume interactions. These droplet structures percolate to an oil-continuous structure as the volume fraction of oil in the microemulsions increases. Percolation thresholds measured as a function of alkane chain length are interpreted in terms of the phase behavior of the microemulsion and the strength of droplet interactions. 41 refs., 6 figs., 3 tabs.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 41630
• Journal Information: Langmuir, Journal Name: Langmuir Journal Issue: 3 Vol. 11; ISSN 0743-7463; ISSN LANGD5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ALKANES
DROPLETS
ETHERS
EXPERIMENTAL DATA
GLYCEROL
GLYCOLS
MICROEMULSIONS
MICROSTRUCTURE
NMR SPECTRA
NUMERICAL DATA
PHASE DIAGRAMS
SELF-DIFFUSION
SMALL ANGLE SCATTERING