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Role of interface on damping characteristics of multi-walled carbon nanotube reinforced epoxy nanocomposites
Published in Institute of Physics Publishing
2019
Volume: 6
   
Issue: 10
Abstract
In this report, we propose an experimental approach to determine the role of the epoxy-CNT interface on damping by designing two systems of composites which differ in the interfacial area. The composites are namely 'dispersed' and 'layered'. The CNTs were uniformly distributed in the epoxy matrix of the dispersed nanocomposites. Whereas, in the layered nanocomposite, a layer of CNT was sandwiched between two epoxy sheets. Image threshold technique was adopted to characterize the CNT spread area in the epoxy matrix. The epoxy-CNT interfacial area is assumed to be less than the CNT spread area due to the agglomeration of CNTs. The CNT spread area of dispersed nanocomposites was found to be 30 times higher than that of the layered composite. In addition to this, it is observed with microstructure analysis using scanning electron microscope and transmission electron microscope that the dispersed nanocomposites were comprised of more epoxy-CNT interfaces, and the layered nanocomposites have more CNT-CNT interfaces. At a particular CNT content, at the glass transition temperature, higher dynamic loss factor was characterized with dispersed nanocomposites. The energy dissipating nature of the epoxy-CNT and CNT-CNT interfaces were studied by analyzing the microstructural mechanisms of damping related to the system of composites dealt with this study. © 2019 IOP Publishing Ltd.
About the journal
JournalMaterials Research Express
PublisherInstitute of Physics Publishing
ISSN20531591
Open AccessNo
Authors (3)
Concepts (22)
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    Carbon nanotubes
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    Damping
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    Dynamic mechanical analysis
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    Dynamics
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    Glass transition
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    Interfaces (materials)
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    Internal friction
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    Micromechanics
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    Nanocomposites
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    Nanotubes
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    Polymer matrix composites
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    Scanning electron microscopy
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    Transmission electron microscopy
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    DAMPING CHARACTERISTICS
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    ENERGY DISSIPATING
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    Experimental approaches
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    Interfacial areas
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    Layered composites
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    LAYERED NANOCOMPOSITES
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    MICROSTRUCTURAL MECHANISMS
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    MICROSTRUCTURE ANALYSIS
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    Multiwalled carbon nanotubes (mwcn)