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Carbon nanotube-based mixed-matrix membranes with supramolecularly engineered interface for enhanced gas separation performance

Journal Article · · Journal of Membrane Science
 [1];  [2];  [2];  [2];  [2]
  1. University of Notre Dame, IN (United States); OSTI
  2. University of Notre Dame, IN (United States)

Here in this study, novel nanocomposite membranes were fabricated from single-walled carbon nanotubes (SWNTs) and a triptycene-containing polyimide. The desirable interfacial morphology and homogenous dispersion of SWNTs were achieved by strong π-π stacking and supramolecular shape-fitting interactions between the nanotube and the paddlewheel-shaped triptycene moieties in polymer matrix. Mixed-matrix membranes (MMMs) containing 2–15 wt% of as-purchased SWNTs (AP-SWNTs) were prepared and tested for their gas transport properties. While all MMMs showed greatly enhanced permeabilities with well-maintained selectivities, a non-linear dependence of permeability on filler content was observed. Another series of MMMs with purified SWNTs (P-SWNTs) and acid-treated SWNT (A-SWNTs) were also prepared. The functionalized A-SWNT MMM exhibited the best separation performance at 2 wt% filler content among all MMMs, which can be attributed to the improved interfacial affinity with carboxylic acid functionalized surface of A-SWNTs.

Research Organization:
University of Notre Dame, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Patrick and Jana Eilers Graduate Student Fellowship
Grant/Contract Number:
SC0019024
OSTI ID:
1803499
Alternate ID(s):
OSTI ID: 2325460
Journal Information:
Journal of Membrane Science, Journal Name: Journal of Membrane Science Journal Issue: C Vol. 598; ISSN 0376-7388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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