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Formation of defect-free polyetherimide/PIM-1 hollow fiber membranes for gas separation.

Authors :
Hao, Lin
Zuo, Jian
Chung, Tai‐Shung
Source :
AIChE Journal; Nov2014, Vol. 60 Issue 11, p3848-3858, 11p
Publication Year :
2014

Abstract

Dual-layer hollow fiber membranes were produced from blends of Ultem and polymer of intrinsic microporosity (PIM-1) with enhanced gas permeance. The effects of spinning parameters (take-up speed and air gap distance) on gas separation performance were investigated based on the pristine Ultem. Selected spinning conditions were further adopted for the blend system, achieving defect-free and almost defect-free hollow fibers. Adding PIM results in a higher fractional free volume, 50% increments in gas permeance were observed for Ultem/PIM-1 (95/5) and more than 100% increments for Ultem/PIM-1 (85/15). Both O<subscript>2</subscript>/N<subscript>2</subscript> and CO<subscript>2</subscript>/CH<subscript>4</subscript> selectivities remained the same for Ultem/PIM-1 (95/5) and above 80% of their respective intrinsic values for Ultem/PIM-1 (85/15). The selective layer thickness ranges from 70 to 120 nm, indicating the successful formation of ultrathin dense layers. Moreover, minimum amounts of the expensive material were consumed, that is, 0.88, 1.7, and 2.3 wt % PIM-1 for Ultem/PIM-1 (95/5), (90/10), and (85/15), respectively. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3848-3858, 2014 [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00011541
Volume :
60
Issue :
11
Database :
Complementary Index
Journal :
AIChE Journal
Publication Type :
Academic Journal
Accession number :
98715560
Full Text :
https://doi.org/10.1002/aic.14565