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Title: Method for the production of fabricated hollow microspheroids

Abstract

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.

Inventors:
;
Publication Date:
Research Org.:
U.S. Department of Energy, Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1183943
Patent Number(s):
9,050,579
Application Number:
13/622,001
Assignee:
U.S. Department of Energy (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Wickramanayake, Shan, and Luebke, David R. Method for the production of fabricated hollow microspheroids. United States: N. p., 2015. Web.
Wickramanayake, Shan, & Luebke, David R. Method for the production of fabricated hollow microspheroids. United States.
Wickramanayake, Shan, and Luebke, David R. Tue . "Method for the production of fabricated hollow microspheroids". United States. https://www.osti.gov/servlets/purl/1183943.
@article{osti_1183943,
title = {Method for the production of fabricated hollow microspheroids},
author = {Wickramanayake, Shan and Luebke, David R.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 09 00:00:00 EDT 2015},
month = {Tue Jun 09 00:00:00 EDT 2015}
}

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Works referenced 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.
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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
  • DOI: 10.1002/app.33905