skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A rapid feedback characterization technique for polymeric hollow fiber membranes using disperse dyes

Abstract

The morphologies of advanced asymmetric gas separation membranes can be described in terms of porosity, pore size distribution, and pore connectivity. These complex morphologies are generated via a rapid non-solvent induced phase separation process to yield hollow fiber membranes. Manipulation and control of these microscopic features are accomplished through adjustment of an array of spinning process parameters. A serious limitation to research in hollow fiber membrane formation is the lengthy time lag between fiber spinning and the collection of characteristic data for process optimization. This lag time is due to the intensive downstream processing required before gas based permeation measurements can be conducted. A rapid feedback characterization technique will be discussed for use in polymeric hollow fiber membrane spinning applications utilizing commercially available disperse dyes. This technique involves dyeing wet hollow fibers immediately after spinning in an aqueous dye bath. In the present work, polysulfone fibers have been characterized using this method before lengthy downstream processing (i.e. solvent exchange, drying, and post-treatment). Dye uptake in the hollow fibers appears to be a function of skin porosity, thereby allowing quick evaluation of permeation characteristics. Dye uptake was measured both visually and using UV-visible spectrophotometry. Examples of fibers characterized using this techniquemore » and relationships between dye uptake and post-treated selectivity are shown and discussed. This technique allows characterization during the fiber spinning process, making on-line optimization of spinning parameters possible.« less

Authors:
;  [1]
  1. Univ. of Texas, Austin, TX (United States)
Publication Date:
OSTI Identifier:
602892
Report Number(s):
CONF-961108-
TRN: 98:001968-0044
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the American Institute of Chemical Engineers (AIChE), Chicago, IL (United States), 10-15 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of 1996 First joint topical conference on processing, structure and properties of polymeric materials; PB: 594 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DRYING; DYES; FIBERS; MEMBRANES; POROSITY; PROCESSING; SPECTROPHOTOMETRY; SULFONES; POLYMERS

Citation Formats

Clausi, D T, and Koros, W J. A rapid feedback characterization technique for polymeric hollow fiber membranes using disperse dyes. United States: N. p., 1996. Web.
Clausi, D T, & Koros, W J. A rapid feedback characterization technique for polymeric hollow fiber membranes using disperse dyes. United States.
Clausi, D T, and Koros, W J. Tue . "A rapid feedback characterization technique for polymeric hollow fiber membranes using disperse dyes". United States.
@article{osti_602892,
title = {A rapid feedback characterization technique for polymeric hollow fiber membranes using disperse dyes},
author = {Clausi, D T and Koros, W J},
abstractNote = {The morphologies of advanced asymmetric gas separation membranes can be described in terms of porosity, pore size distribution, and pore connectivity. These complex morphologies are generated via a rapid non-solvent induced phase separation process to yield hollow fiber membranes. Manipulation and control of these microscopic features are accomplished through adjustment of an array of spinning process parameters. A serious limitation to research in hollow fiber membrane formation is the lengthy time lag between fiber spinning and the collection of characteristic data for process optimization. This lag time is due to the intensive downstream processing required before gas based permeation measurements can be conducted. A rapid feedback characterization technique will be discussed for use in polymeric hollow fiber membrane spinning applications utilizing commercially available disperse dyes. This technique involves dyeing wet hollow fibers immediately after spinning in an aqueous dye bath. In the present work, polysulfone fibers have been characterized using this method before lengthy downstream processing (i.e. solvent exchange, drying, and post-treatment). Dye uptake in the hollow fibers appears to be a function of skin porosity, thereby allowing quick evaluation of permeation characteristics. Dye uptake was measured both visually and using UV-visible spectrophotometry. Examples of fibers characterized using this technique and relationships between dye uptake and post-treated selectivity are shown and discussed. This technique allows characterization during the fiber spinning process, making on-line optimization of spinning parameters possible.},
doi = {},
url = {https://www.osti.gov/biblio/602892}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: