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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Javanshour, Farzin
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Stiffness of In-Situ Formed Interleaving Polymeric Nanofiber-Epoxy Nanocompositescitations
- 2023Effect of graphene oxide fibre surface modification on low-velocity impact and fatigue performance of flax fibre reinforced compositescitations
- 2023Effect of graphene oxide fibre surface modification on low-velocity impact and fatigue performance of flax fibre reinforced compositescitations
- 2023Interfacial Toughening Strategies for Impact and Fatigue Tolerant Structural Biocomposites
- 2022High-speed thermal mapping and impact damage onset in CFRP and FFRP
- 2022Flax fibre sizings for fibre-reinforced thermosets - investigating the influences of different sizing agents on fibre moisture content and composite properties
- 2022Bearing strength prediction by cfrp and ffrp damage onset criteria for riveted joints
- 2022High-Speed Thermal Mapping and Impact Damage Onset in CFRP and FFRP
- 2022The performance of flax reinforced composites for wireless and sport applications : natural additives and sandwich concepts
- 2022Flax fibre sizings for fibre-reinforced thermosets - investigating the influences of different sizing agents on the composite properties
- 2022Bearing strength prediction by cfrp and ffrp dam age onset criteria for riveted joints
- 2022Impact and fatigue tolerant natural fibre reinforced thermoplastic composites by using non-dry fibrescitations
- 2022Impact and fatigue tolerant natural fibre reinforced thermoplastic composites by using non-dry fibrescitations
- 2021Modulating impact resistance of flax epoxy composites with thermoplastic interfacial tougheningcitations
- 2021One surface treatment, multiple possibilities : Broadening the use‐potential of para‐aramid fibers with mechanical adhesioncitations
- 2021One surface treatment, multiple possibilitiescitations
- 2021Microscale sensor solution for data collection from fibre-matrix interfacescitations
- 2021One Surface Treatment, Multiple Possibilities: Broadening the Use-Potential of Para-Aramid Fibers with Mechanical Adhesioncitations
- 2021Effect of graphene oxide surface treatment on the interfacial adhesion and the tensile performance of flax epoxy compositescitations
- 2017Synergistic role of in-situ crosslinkable electrospun nanofiber/epoxy nanocomposite interlayers for superior laminated compositescitations
Places of action
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article
Synergistic role of in-situ crosslinkable electrospun nanofiber/epoxy nanocomposite interlayers for superior laminated composites
Abstract
Adopting a multi-scaled/hierarchical toughening approach, we have produced nanofiber-reinforced epoxy laminate composites with superior toughness as a consequence of built-in, thermally catalyzed cross-linking between the nanofiber and the epoxy matrix, in addition to the usual curing within the epoxy itself. The nanofiber composition of P(St-co-GMA)/TBA-PA is designed such that the cross-linking agent PA groups are catalyzed by the thermally stimulated TBA initiators and inherent epoxy-nanofiber interfacial quality is promoted for toughening purposes. These nanofibers are electrospun onto two forms of the same base epoxy—neat resin films and pre-preg plies containing unidirectional carbon fibers. The nanofiber/epoxy nanocomposite specimens are manufactured via an in-house hot-press film molding method. DSC analysis reveal an increase in exothermic curing enthalpy, consistent with cross-linking between the epoxide groups of the fiber and epoxy matrix occurring in-situ, i.e., triggered and advanced during the epoxy curing cycle. Analysis of the curing kinetics, following Ozawa-Flynn-Wall method, shows that the P(St-co-GMA)/TBA-PA nanofibers have a significant autocatalytic effect on the epoxy matrix curing. Increases in tensile strength (30%) and elastic modulus (8%) are measured compared to the un-reinforced epoxy specimens. Furthermore, end-notched flexure tests reveal a 95% increase in G IIC , due to the incorporation of a single P(St-co-GMA)/TBA-PA nanofiber interlayer into laminated carbon fiber-reinforced composite of (0) 48 lay-up configuration. These results suggest that the self-initiated cross-linking between the nanofibers and surrounding epoxy matrix synergistically forms interlayer zones that contribute to toughening. Analysis of the fracture surfaces is presented to elaborate on the significant role of the proposed in-situ cross-linked nanofibers on the remarkable improvements in mechanical behavior of these nanocomposites and interlayered laminates.