Solvent-resistant microporous polymide membranes
Abstract
An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.
- Inventors:
- Issue Date:
- Research Org.:
- Bend Research, Inc
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 597099
- Patent Number(s):
- 5725769
- Application Number:
- PAN: 8-503,809
- Assignee:
- Bend Research, Inc., Bend, OR (United States)
- DOE Contract Number:
- FG03-92ER81420; FG03-91ER81230
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 10 Mar 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MEMBRANES; CHEMICAL COATING; SEPARATION PROCESSES; AMINES; ANHYDRIDES
Citation Formats
Miller, W K, McCray, S B, and Friesen, D T. Solvent-resistant microporous polymide membranes. United States: N. p., 1998.
Web.
Miller, W K, McCray, S B, & Friesen, D T. Solvent-resistant microporous polymide membranes. United States.
Miller, W K, McCray, S B, and Friesen, D T. Tue .
"Solvent-resistant microporous polymide membranes". United States.
@article{osti_597099,
title = {Solvent-resistant microporous polymide membranes},
author = {Miller, W K and McCray, S B and Friesen, D T},
abstractNote = {An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {3}
}
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