Ultra-Permeable Single-Walled Carbon Nanotube Membranes with Exceptional Performance at Scale.

Autor: Jue ML; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Buchsbaum SF; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Chen C; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Park SJ; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Meshot ER; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Wu KJJ; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA., Fornasiero F; Department of Physical and Life Sciences Lawrence Livermore National Laboratory Livermore CA 94550 USA.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2020 Nov 09; Vol. 7 (24), pp. 2001670. Date of Electronic Publication: 2020 Nov 09 (Print Publication: 2020).
DOI: 10.1002/advs.202001670
Abstrakt: Enhanced fluid transport in single-walled carbon nanotubes (SWCNTs) promises to enable major advancements in many membrane applications, from efficient water purification to next-generation protective garments. Practical realization of these advancements is hampered by the challenges of fabricating large-area, defect-free membranes containing a high density of open, small diameter SWCNT pores. Here, large-scale (≈60 cm 2 ) nanocomposite membranes comprising of an ultrahigh density (1.89 × 10 12  tubes cm -2 ) of 1.7 nm SWCNTs as sole transport pathways are demonstrated. Complete opening of all conducting nanotubes in the composite enables unprecedented accuracy in quantifying the enhancement of pressure-driven transport for both gases (>290× Knudsen prediction) and liquids (6100× no-slip Hagen-Poiseuille prediction). Achieved water permeances (>200 L m -2 h -1 bar -1 ) greatly exceed those of state-of-the-art commercial nano- and ultrafiltration membranes of similar pore size. Fabricated membranes reject nanometer-sized molecules, permit fractionation of dyes from concentrated salt solutions, and exhibit excellent chemical resistance. Altogether, these SWCNT membranes offer new opportunities for energy-efficient nano- and ultrafiltration processes in chemically demanding environments.
Competing Interests: The authors declare no conflict of interest.
(© 2020 Lawrence Livermore National Laboratory/Security, LLC. Published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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