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Title: Effects of coating solvent and thermal treatment on transport and morphological characteristics of PDMS/Torlon composite hollow fiber membrane

Authors:
ORCiD logo [1];  [2];  [3];  [3]
  1. Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, 1401 N Pine Street Rolla Missouri 65409, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW Atlanta Georgia 30332
  2. General Electric Global Research Center, 1 Research Circle Niskayuna New York 12309
  3. School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW Atlanta Georgia 30332
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1374091
Grant/Contract Number:
FE0007514
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Applied Polymer Science
Additional Journal Information:
Journal Volume: 134; Journal Issue: 42; Related Information: CHORUS Timestamp: 2017-08-07 09:42:35; Journal ID: ISSN 0021-8995
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
United States
Language:
English

Citation Formats

Rownaghi, Ali A., Bhandari, Dhaval, Burgess, Steven K., and Mikkilineni, Dharmik S.. Effects of coating solvent and thermal treatment on transport and morphological characteristics of PDMS/Torlon composite hollow fiber membrane. United States: N. p., 2017. Web. doi:10.1002/app.45418.
Rownaghi, Ali A., Bhandari, Dhaval, Burgess, Steven K., & Mikkilineni, Dharmik S.. Effects of coating solvent and thermal treatment on transport and morphological characteristics of PDMS/Torlon composite hollow fiber membrane. United States. doi:10.1002/app.45418.
Rownaghi, Ali A., Bhandari, Dhaval, Burgess, Steven K., and Mikkilineni, Dharmik S.. Fri . "Effects of coating solvent and thermal treatment on transport and morphological characteristics of PDMS/Torlon composite hollow fiber membrane". United States. doi:10.1002/app.45418.
@article{osti_1374091,
title = {Effects of coating solvent and thermal treatment on transport and morphological characteristics of PDMS/Torlon composite hollow fiber membrane},
author = {Rownaghi, Ali A. and Bhandari, Dhaval and Burgess, Steven K. and Mikkilineni, Dharmik S.},
abstractNote = {},
doi = {10.1002/app.45418},
journal = {Journal of Applied Polymer Science},
number = 42,
volume = 134,
place = {United States},
year = {Fri Jun 23 00:00:00 EDT 2017},
month = {Fri Jun 23 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 23, 2018
Publisher's Accepted Manuscript

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • The performance for solvent extraction in microporous membrane hollow-fiber modules with various fiber passes, but with a specified total number of hollow fibers, has been calculated. Increasing the fiber passes, as well as decreasing the total cross-section area of flowing channels inside the hollow fibers, will increase the fluid velocity, thereby leading to an increased mass-transfer coefficient. Considerable improvement in the mass-transfer rate is obtainable if multiple-fiber passes, instead of a one-fiber pass, are arranged in a hollow-fiber module with a total number of fixed hollow fibers.
  • A glass capillary with an inner metal coating is proposed to be used as soft-x-ray fiber optics in medical applications. Based on the results of theoretical calculations, nickel was chosen as the coating material for x rays radiated from a conventional x-ray tube. A nickel-coated capillary was fabricated by electroless deposition, and focusing and collimating effects were observed from measurements of the transmission efficiency of soft x rays. The transmission of a nickel-coated capillary with an inner diameter of 0.53 mm and a length of 300 mm was 10%, which is approximately double that of an uncoated glass capillary.
  • Saccharomyces cerevisiae ATCC 4126 was grown within the macroporous matrix of asymmetric-walled polysulfone hollow-fiber membranes and on the exterior surfaces of isotropic-walled polypropylene hollow-fiber membranes. Nutrients were supplied and products were removed by single-pass perfusion of the fiber lumens. Growth of yeast cells within the macrovoids of the asymmetric-walled membranes attained densities of greater than 10 to the power of 10 cells per ml and in some regions accounted for nearly 100% of the available macrovoid volume, forming a tissue-like mass. A radial distribution of cell packing existed across the fiber wall, indicating an inadequate glucose supply to cells locatedmore » beyond 100 mum from the lumen surface. By comparison, yeast cell growth on the exterior surfaces of the isotropic-walled membranes resulted in an average density of 3.5 x 10 to the power of 9 viable cells per ml. Ethanol production by reactors containing isotropic polypropylene fibers reached a maximum value of 26 g/liter-h based on the total reactor volume. Reactor performance depended on the fiber packing density and on the glucose medium flow rate and was limited by low nutrient and product transport rates. The inhibition of ethanol production and the reduction in fermentation efficiency arose primarily from the accumulation of CO/sub 2/ gas within the sealed reactor shell space. (Refs. 37).« less
  • The microporous polyethylene hollow-fiber membrane has a unique microfibrile structure throughout its depth and has been found to possess the functions of filtration and adsorption of endotoxin in water. The membrane has a maximum pore diameter of approximately 0.04 micron, a diameter which is within the range of microfiltration. Approximately 10 and 20% of the endotoxin in tap water and subterranean water, respectively, was smaller than 0.025 micron. Endotoxin in these water sources was efficiently removed by the microporous polyethylene hollow-fiber membrane. Escherichia coli O113 culture broth contained 26.4% of endotoxin smaller than 0.025 micron which was also removed. Endotoxinmore » was leaked into the filtrate only when endotoxin samples were successively passed through the membrane. These results indicate that endotoxin smaller than the pore size of the membrane was adsorbed and then leaked into the filtrate because of a reduction in binding sites. Dissociation of /sup 3/H-labeled endotoxin from the membrane was performed, resulting in the removal of endotoxin associated with the membrane by alcoholic alkali at 78% efficiency.« less