Correlation between electrical conductivity and manufacturing processes of nanofilled carbon fiber reinforced composites

Guadagno, Liberata; Vietri, Umberto; Raimondo, Marialuigia; Vertuccio, Luigi; Barra, Giuseppina; Vivo, Biagio De; Lamberti, Patrizia; Spinelli, Giovanni; Tucci, Vincenzo; Nicola, F. De; Volponi, R.; Russo, Salvatore

doi:10.1016/j.compositesb.2015.05.025

Cited by 63 publications

(33 citation statements)

References 28 publications

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“…The reason why a blank formulation has been used was to discriminate only between the effects of the addition of the above-mentioned components. In addition, to establish the properties of nanofilled adhesives for aeronautic applications able to hinder both the insulating properties and poor flame resistance of epoxy resins, a different approach in preparing an adhesive was adopted: carbon nanotubes were dispersed above EPT [ 34 , 35 , 36 ], together with POSS compounds at the concentration of 5 wt %, into the epoxy resin. DodecaPhenyl Oligomeric Silsesquioxanes (DPHPOSS) and Glycidyl Oligomeric Silsesquioxanes (GPOSS) were used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Toughening of Epoxy Adhesives by Combined Interaction of Carbon Nanotubes and Silsesquioxanes

et al. 2017

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The extensive use of adhesives in many structural applications in the transport industry and particularly in the aeronautic field is due to numerous advantages of bonded joints. However, still many researchers are working to enhance the mechanical properties and rheological performance of adhesives by using nanoadditives. In this study the effect of the addition of Multi-Wall Carbon Nanotubes (MWCNTs) with Polyhedral Oligomeric Silsesquioxane (POSS) compounds, either Glycidyl Oligomeric Silsesquioxanes (GPOSS) or DodecaPhenyl Oligomeric Silsesquioxanes (DPHPOSS) to Tetraglycidyl Methylene Dianiline (TGMDA) epoxy formulation, was investigated. The formulations contain neither a tougher matrix such as elastomers nor other additives typically used to provide a closer match in the coefficient of thermal expansion in order to discriminate only the effect of the addition of the above-mentioned components. Bonded aluminium single lap joints were made using both untreated and Chromic Acid Anodisation (CAA)-treated aluminium alloy T2024 adherends. The effects of the different chemical functionalities of POSS compounds, as well as the synergistic effect between the MWCNT and POSS combination on adhesion strength, were evaluated by viscosity measurement, tensile tests, Dynamic Mechanical Analysis (DMA), single lap joint shear strength tests, and morphological investigation. The best performance in the Lap Shear Strength (LSS) of the manufactured joints has been found for treated adherends bonded with epoxy adhesive containing MWCNTs and GPOSS. Carbon nanotubes have been found to play a very effective bridging function across the fracture surface of the bonded joints.

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Section: Introductionmentioning

confidence: 99%

Toughening of Epoxy Adhesives by Combined Interaction of Carbon Nanotubes and Silsesquioxanes

et al. 2017

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“…In particular, based on recent developments in the field of nanotechnologies, and successful strategies recently identified in the literature, promising multifunctional resins able to simultaneously increase flame resistance, electrical conductivity and to impart regenerative ability can be employed as structural materials in many fields of structural materials [1][2][3][4][5][6][7][8]. As an instance, Carbon Fiber Reinforced Panels (CFRPs), impregnated using multifunctional resin, have been manufactured by Resin Film Infusion (RFI) using a nonusual technique to infuse a nano-filled resin into the carbon fiber dry preform [9][10]. Several flat panels have been produced and tested.…”

Section: Introductionmentioning

confidence: 99%

Development of aeronautical epoxy nanocomposites having an integrated selfhealing ability

et al. 2018

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Functionalized multi-wall carbon nanotubes (MWCNTs) have been embedded in a rubber-toughened epoxy formulation in order to explore the possibility to impart an auto-repair function to the epoxy matrix. The nanofiller has been covalently functionalized with hydrogen bonding moieties able to act as donor and acceptor of hydrogen bondings. Healing efficiencies have been evaluated for nano charged epoxy formulations at a loading of 0.5% wt/wt of functionalized MWCNTs bearing barbituric acid and thymine-based ligands. For both the performed functionalizations, a self-healing efficiency higher than 50% has been found. Dynamic Mechanical Analysis (DMA) highlights that the inclusion of nanofiller increases the storage moduli. Furthermore, DMA analysis evidences the presence of a phase characterized by a greater mobility of the epoxy chains, which promotes the activation of self-healing mechanisms.

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“…In the last decade many research efforts have been devoted toward studies on polymer nanocomposites filled with such highly conductive additives given their peculiar and enhanced properties with respect to those of the neat resin. These improvements strongly depend on the chemistry of polymer matrices, nature of nanofillers and their mutual interactions [1,2,3]. In particular, the improvements are originated by the huge filler/polymer matrix interface which allows to transfer the notable properties of the fillers to the resulting composites.…”

Section: Introductionmentioning

confidence: 99%

Electrical characterization of aeronautical nanocomposites supported by Tunneling AFM (TUNA)

et al. 2018

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Epoxy nanocomposites fulfill tight and compelling industrial requirements in the field of structural material for aeronautical applications. In this paper the development and characterization of nanocomposites obtained by filling tetrafunctional epoxy resin (tetraglycidyl methylene dianiline cured with the aromatic diamine 4,4’-diaminodiphenylsulfone, named T20BD) with carbon nanofibers (CNF) is discussed. A filler amount ranging from 0.05% to 2%wt is considered. The DC volume conductivity and the dielectric characteristics (ϵ’) of the nanocomposites in the frequency range 100Hz-1MHz are analyzed and compared with those of the pure resin. Atomic force microscopy, mapping the local topography by means of tunneling effect, is used for recording the electrical percolation path for nanocomposites. In particular, the case 1.3wt% of CNF filled nanocomposites that exhibits a stable behavior of the conductivity in the full investigated frequency range, is here reported. The developed filled epoxy used in carbon fiber reinforced composites, shows enhanced electrical properties leading to better electromagnetic (EM) performances in EM coatings, EM shields and filters or radar absorber materials (RAMs).

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Correlation between electrical conductivity and manufacturing processes of nanofilled carbon fiber reinforced composites

Cited by 63 publications

References 28 publications

Toughening of Epoxy Adhesives by Combined Interaction of Carbon Nanotubes and Silsesquioxanes

Toughening of Epoxy Adhesives by Combined Interaction of Carbon Nanotubes and Silsesquioxanes

Development of aeronautical epoxy nanocomposites having an integrated selfhealing ability

Electrical characterization of aeronautical nanocomposites supported by Tunneling AFM (TUNA)

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