Solubilization of trace organics in block copolymer micelles for environmental separation using membrane extraction principles. Progress report, May 1, 1992--December 31, 1992
The solubilization of a range of polycyclic aromatic hydrocarbons in block copolymer micelles has been studied as a function of polymer composition, architecture, and temperature. Micelle formation is favored at high temperatures, leading to significant enhancements in solubilization capacity. At low temperatures, however, micelles do not form and the solubilization capacity of the block copolymer solution for the organics is low; this provides a convenient method for the regeneration of micellar solutions used as ``solvents`` in the treatment of contaminated feed streams using membrane extraction principles. It has also been shown (in collaboration with K.P. Johnston of University of Texas, Austin) that supercritical CO{sub 2} can be used effectively for micelle regeneration. Theoretical calculations of the structure of block copolymer micelles in the presence and absence of solutes using self-consistent mean-field lattice theories have successfully captured the trends observed with changing polymer composition and architecture, often quantitatively. The temperature and composition dependence of the micellar properties were determined by allowing the individual polymer segments to assume both polar and non-polar conformations.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-92ER14262
- OSTI ID:
- 10109673
- Report Number(s):
- DOE/ER/14262-1; ON: DE93006000
- Resource Relation:
- Other Information: PBD: Dec 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solubilization of trace organics in block copolymer micelles for environmental separation using membrane extraction principles. Final report, May 1, 1992--April 30, 1995
Molecular modeling of micelle formation and solubilization in block copolymer micelles. 2. Lattice theory for monomers with internal degrees of freedom
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COPOLYMERS
REGENERATION
MICELLAR SYSTEMS
PYRENE
SOLUBILITY
SUPERCRITICAL GAS EXTRACTION
POLYCYCLIC AROMATIC HYDROCARBONS
REMOVAL
PROGRESS REPORT
POLYETHYLENE GLYCOLS
SOLUTIONS
CARBON DIOXIDE
540320
400105
CHEMICALS MONITORING AND TRANSPORT
SEPARATION PROCEDURES