Method for the production of fabricated hollow microspheroids
The method relates to the fabrication of a polymer microspheres comprised of an asymmetric layer surrounding a hollow interior. The fabricated hollow microsphere is generated from a nascent hollow microsphere comprised of an inner core of core fluid surrounded by a dope layer of polymer dope, where the thickness of the dope layer is at least 10% and less than 50% of the diameter of the inner core. The nascent hollow microsphere is exposed to a gaseous environment, generating a vitrified hollow microsphere, which is subsequently immersed in a coagulation bath. Solvent exchange produces a fabricated hollow microsphere comprised of a densified outer skin surrounding a macroporous inner layer, which surrounds a hollow interior. In an embodiment, the polymer is a polyimide or a polyamide-imide, and the non-solvent in the core fluid and the coagulation bath is water. The fabricated hollow microspheres are particularly suited as solvent supports for gas separation processes.
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- OSTI Identifier:
- U.S. Department of Energy (Washington, DC) NETL
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- Research Org:
- U.S. Department of Energy, Washington, DC (United States)
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- Country of Publication:
- United States
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Other works cited in this record:Preparation and characterization of ionic liquid polymer microspheres [PEEKWC/DMF/CYPHOS IL 101] using the phase-inversion technique
journal, September 2012
- Shanthana Lakshmi, D.; Figoli, A.; Fiorani, G.
- Separation and Purification Technology, Vol. 97, p. 179-185
Fabrication of hollow, spherical polymeric “micropillows” using a dual layer spinneret
journal, March 2011
- Shan Wickramanayake, W. M.; Lively, R. P.; Polizzotti, R. S.
- Journal of Applied Polymer Science, Vol. 121, Issue 5, p. 2835-2842
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