NDLI: Carbon nanotube-templated polyaniline nanofibers: synthesis, flash welding and ultrafiltration membranes

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Inside back cover

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Nanoscale Vol - 5 Issue - 8

Nanoscale Vol - 5 Issue - 7

Nanoscale Vol - 5 Issue - 6

Nanoscale Vol - 5 Issue - 5

Nanoscale Vol - 5 Issue - 4

Nanoscale Vol - 5 Issue - 3

Carbon nanotube-templated polyaniline nanofibers: synthesis, flash welding and ultrafiltration membranes

Content Provider	Royal Society of Chemistry (RSC)
Author	Chain, Wei Yu, Deng-Guang Liao, Yaozu Li, Xin-Gui Wang, Xia Kaner, Richard B. Hoek, Eric M. V.
Copyright Year	2013
Abstract	Electro-active switchable ultrafiltration membranes are of great interest due to the possibility of external control over permeability, selectivity, anti-fouling and cleaning. Here, we report on hybrid single-walled carbon nanotube (SWCNT)–polyaniline (PANi) nanofibers synthesized by in situ polymerization of aniline in the presence of oxidized SWCNTs. The composite nanofibers exhibit unique morphology of core–shell (SWCNT–PANi) structures with average total diameters of 60 nm with 10 to 30 nm thick PANi coatings. The composite nanofibers are easily dispersed in polar aprotic solvents and cast into asymmetric membranes via a nonsolvent induced phase separation. The hybrid SWCNT–PANi membranes are electrically conductive at neutral pH and exhibit ultrafiltration-like permeability and selectivity when filtering aqueous suspensions of 6 nm diameter bovine serum albumin and 48 nm diameter silica particles. A novel flash welding technique is utilized to tune the morphology, porosity, conductivity, permeability and nanoparticle rejection of the SWCNT–PANi composite ultrafiltration membranes. Upon flash welding, both conductivity and pure water permeability of the membranes improves by nearly a factor of 10, while maintaining silica nanoparticle rejection levels above 90%. Flash welding of SWCNT–PANi composite membranes holds promise for formation of electrochemically tunable membranes.
Starting Page	3856
Ending Page	3862
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	5
Issue Number	9
Journal	Nanoscale
DOI	10.1039/c3nr00441d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Carbon nanotube Bovine serum albumin Ultrafiltration Semipermeable membrane Aniline Welding Nanoparticle Polymerization PH Porosity Polyaniline Silicon dioxide
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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