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“Brick-and-Mortar” Nanostructured Interphase for Glass Fiber-Reinforced Polymer Composites

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Title: “Brick-and-Mortar” Nanostructured Interphase for Glass Fiber-Reinforced Polymer Composites
Authors: De Luca, F
Sernicola, G
Bismarck, A
Shaffer, MSP
Item Type: Journal Article
Abstract: The fiber–matrix interface plays a critical role in determining composite mechanical properties. While a strong interface tends to provide high strength, a weak interface enables extensive debonding, leading to a high degree of energy absorption. Balancing these conflicting requirements by engineering composite interfaces to improve strength and toughness simultaneously still remains a great challenge. Here, a nanostructured fiber coating was realized to manifest the critical characteristics of natural nacre, at a reduced length scale, consistent with the surface curvature of fibers. The new interphase contains a high proportion (∼90 wt %) of well-aligned inorganic platelets embedded in a polymer; the window of suitable platelet dimensions is very narrow, with an optimized platelet width and thickness of about 130 and 13 nm, respectively. An anisotropic, nanostructured coating was uniformly and conformally deposited onto a large number of 9 μm diameter glass fibers, simultaneously, using self-limiting layer-by-layer assembly (LbL); this parallel approach demonstrates a promising strategy to exploit LbL methods at scale. The resulting nanocomposite interphase, primarily loaded in shear, provides new mechanisms for stress dissipation and plastic deformation. The energy released by fiber breakage in tension appear to spread and dissipate within the nanostructured interphase, accompanied by stable fiber slippage, while the interfacial strength was improved up to 30%.
Issue Date: 13-Feb-2018
Date of Acceptance: 25-Jan-2018
URI: http://hdl.handle.net/10044/1/56579
DOI: https://dx.doi.org/10.1021/acsami.7b16136
ISSN: 1944-8244
Publisher: American Chemical Society
Start Page: 7352
End Page: 7361
Journal / Book Title: ACS Applied Materials and Interfaces
Volume: 10
Issue: 8
Copyright Statement: © 2018 American Chemical Society
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: AERO/RB1527
Keywords: composite interphase
layer-by-layer assembly
mechanical properties
single-fiber composite tests
toughening mechanisms
0904 Chemical Engineering
0303 Macromolecular And Materials Chemistry
0306 Physical Chemistry (Incl. Structural)
Nanoscience & Nanotechnology
Publication Status: Published
Appears in Collections:Chemistry
Chemical Engineering
Faculty of Natural Sciences
Faculty of Engineering