Interfacially-grafted single wall carbon nanotube / poly (vinyl alcohol) composite fibers

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Title: Interfacially-grafted single wall carbon nanotube / poly (vinyl alcohol) composite fibers
Authors: Lee, W
Clancy, A
Fernández-Toribio, JC
Anthony, D
White, E
Solano, E
Leese, HS
Vilatela, JJ
Shaffer, MSP
Item Type: Journal Article
Abstract: Nanocomposites are critically influenced by interfacial interactions between the reinforcement and matrix. Polyvinyl alcohol (PVOH) of varying molecular weights were prepared and grafted to single-walled carbon nanotubes (SWCNTs), to improve the interfacial interaction with a homopolymer PVOH matrix. Nanocomposite fibers were coagulation spun across a broad range of loading fractions, controlled by the spinning dope composition. An intermediate grafted-PVOH molecular weight (10 kDa) maximized grafting ratio, and the final composite mechanical performance; the positive effects were attributed to the increased degree of dispersion of the SWCNTs in the dope, as well as the favorable interface. The PVOH grafting increased the stability of the SWCNT loading fractions (up to 45 wt.%), offering increased strength (up to 1100 MPa) and stiffness (up to 38.5 GPa); at the same time, strain to-failures remained high (up to 23.3%), resulting in high toughness (up to 125 J g-1).
Issue Date: 1-May-2019
Date of Acceptance: 17-Jan-2019
URI: http://hdl.handle.net/10044/1/65987
ISSN: 0008-6223
Publisher: Elsevier
Journal / Book Title: Carbon
Copyright Statement: This paper is embargoed until 12 months after publication.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: AERO/RB1527
Keywords: 03 Chemical Sciences
02 Physical Sciences
09 Engineering
Nanoscience & Nanotechnology
Publication Status: Accepted
Appears in Collections:Chemistry
Faculty of Natural Sciences



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