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Separation of CO2/CH4 and O2/N2 by polysulfone hollow fiber membranes: effects of membrane support properties and surface coating materials

  • Rosyiela Azwa Roslan , Woei Jye Lau EMAIL logo , Divya Barathi Sakthivel , Shahab Khademi , Abdul Karim Zulhairun , Pei Sean Goh , Ahmad Fauzi Ismail , Kok Chung Chong and Soon Onn Lai
Published/Copyright: April 19, 2018
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 38 Issue 9

Abstract

In this study, six different types of polysulfone hollow fiber membranes were fabricated from the same polymeric dope solution by manipulating several important parameters during the spinning process, aiming to find the best membrane supports for the coating layer in the gas separation process. The experimental results showed that upon the polydimethylsiloxane (PDMS) coating process, the gas pair selectivities of all six types of membranes were significantly increased with respect to carbon dioxide (CO2)/methane (CH4) and oxygen (O2)/nitrogen (N2) separation. However, the membrane support spun at higher air gap and lower dope extrusion rate was found to be the best support for PDMS coating owing to its good structural integrity that led to a good balance between gas permeance and gas pair selectivity. Further investigation showed that the use of poly(ether block amide) (Pebax) as coating material did not certainly improve both gas permeance and the selectivity of hollow fiber membranes, although Pebax was previously reported to exhibit better performance than PDMS in flat sheet membranes. One of the main reasons is the difficulty of forming a defect-free Pebax coating layer on the outer surface of hollow fibers owing to the stickiness issue among fibers upon coating. More research is still needed to optimize the Pebax coating solution and its drying process in order to achieve the full potential of such coating material for hollow fiber membranes.

Keywords: gas separation; hollow fiber; PDMS coating; Pebax coating; spinning parameter

Acknowledgments

The corresponding author would like to thank Universiti Teknologi Malaysia for providing financial support for this research work under Research University Grant (no. Q.J130000.2546.15H41).

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Received: 2017-07-26
Accepted: 2018-03-12
Published Online: 2018-04-19
Published in Print: 2018-10-25

©2018 Walter de Gruyter GmbH, Berlin/Boston

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  4. Morphological characterization, thermal, and mechanical properties of compatibilized high density polyethylene/polystyrene/organobentonite ternary nanocomposites
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  7. Surface modification of Sb-SnO2/potassium titanate composite and their performance for acrylic coatings
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  9. Engineering and processing
  10. Study on structures and properties of ultra-hot drawing UHMWPE fibers fabricated via dry spinning method
  11. Separation of CO2/CH4 and O2/N2 by polysulfone hollow fiber membranes: effects of membrane support properties and surface coating materials
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https://doi.org/10.1515/polyeng-2017-0272
Keywords for this article
gas separation; hollow fiber; PDMS coating; Pebax coating; spinning parameter

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Structure mediation and ductility enhancement of poly(l-lactide) by random copolymer poly(d-lactide-co-ε-caprolactone)
  4. Morphological characterization, thermal, and mechanical properties of compatibilized high density polyethylene/polystyrene/organobentonite ternary nanocomposites
  5. Preparation and assembly
  6. Simultaneous toughening and reinforcing of cyanate ester/benzoxazine resins with improved mechanical and thermal properties by using hyperbranched polyesters
  7. Surface modification of Sb-SnO2/potassium titanate composite and their performance for acrylic coatings
  8. Poly (vinyl alcohol)/nano-diamond composite films and hydrogels prepared by gamma ray
  9. Engineering and processing
  10. Study on structures and properties of ultra-hot drawing UHMWPE fibers fabricated via dry spinning method
  11. Separation of CO2/CH4 and O2/N2 by polysulfone hollow fiber membranes: effects of membrane support properties and surface coating materials
  12. Electric field-induced alignment of MWCNTs during the processing of PP/MWCNT composites: effects on electrical, dielectric, and rheological properties
  13. A molecular modeling study for miscibility of polyimide/polythene mixing systems with/without compatibilizer
  14. Analysis and quantitative estimation of phenolic antioxidants in polypropylene packaging for fat products
  15. Effects of ultrasonic injection molding conditions on the plate processing characteristics of PMMA
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