Influence of electrospun Nylon 6,6 nanofibrous mats on the interlaminar properties of Gr–epoxy composite laminates

Palazzetti, Roberto; Zucchelli, Andrea; Gualandi, Chiara; Focarete, Maria Letizia; Donati, Lorenzo; Minak, Giangiacomo; Ramakrishna, Seeram

doi:10.1016/j.compstruct.2011.08.019

Cited by 122 publications

(88 citation statements)

References 18 publications

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“…hanical results in [2] showed in that virgin laminates exhibited a 12.3% higher maximum load than the nanomodified ones, while nanomodified specimens showed 23.2% and 4.9% increase on energy absorbed and GIC compared to virgin specimens respectively Figure 2 shows the cumulative of acoustic energy and the mechanical results. Whenever the crack propagates, force drops and AE energy rises.…”

Section: Resultsmentioning

confidence: 99%

“…In this paper AE features such as count, rise time, energy and amplitude, are used for investigating failure mechanisms. For a more detailed description of the experiments, reader is referred to [2]. Two data analysis techniques have been employed here: unsupervised k-means clustering and supervised artificial neural network.…”

Section: Methodsmentioning

confidence: 99%

“…During the tests force-displacement curves and acoustic emissions were recorded. Mechanical parameters have been used in [2] to prove the effectiveness of the nanoreinforcement. In this paper AE features such as count, rise time, energy and amplitude, are used for investigating failure mechanisms.…”

Section: Methodsmentioning

confidence: 99%

“…As some of the authors have already demonstrated, interleaving small diameter fibres between one or more interfaces improves strength, toughness and delamination resistance of composites without reducing the in-plane properties or adding weight [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…Present paper uses non-supervised clustering k-means and supervised pattern recognition neural network (NN) techniques applied on the features of acoustic emission signals to discriminate different kinds of failure mechanisms. AE here considered have been recorded during the experimental campaign performed in [2]: DBC tests on carbon fibre reinforced plastic (CFRP) laminates with and without nanofibrous interleaving. Aim of the study is to investigate and explain the effect of interleaving polymeric nanofibers into CFRPs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

Fallahi¹,

Nardoni²,

Heidary³

et al. 2016

FME Transaction

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

Fallahi¹,

Nardoni²,

Heidary³

et al. 2016

FME Transaction

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Stabilized electrospinning of heat stimuli/in situ crosslinkable nanofibers and their self‐same nanocomposites

Bilge

Ürkmez

Şimşek

et al. 2016

J of Applied Polymer Sci

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We present a strategy for stabilizing the morphological integrity of electrospun polymeric nanofibers by heat stimuli in situ crosslinking. Amorphous polymer nanofibers, such as polystyrene (PS) and its co-polymers tend to lose their fiber morphology during processing at temperatures above their glass transition temperature (T g ) typically bound to happen in nanocomposite/structural composite applications. As an answer to this problem, incorporation of the crosslinking agents, phthalic anhydride (PA) and tributylamine (TBA), into the electrospinning polymer solution functionalized by glycidylmethacrylate (GMA) copolymerization, namely P(St-co-GMA), is demonstrated. Despite the presence of the crosslinker molecules, the electrospinning polymer solution is stable and its viscosity remains unaffected below 60 8C. Crosslinking reaction stands-by and can be thermally stimulated during post-processing of the electrospun P(St-co-GMA)/PA-TBA fiber mat at intermediate temperatures (below the T g ). This strategy enables the preservation of the nanofiber morphology during subsequent high temperature processing. The crosslinking event leads to an increase in T g of the base polymer by 30 8C depending on degree of crosslinking. Crosslinked nanofibers are able to maintain their nanofibrous morphology above the T g and upon exposure to organic solvents. In situ crosslinking in epoxy matrix is also reported as an example of high temperature demanding application/processing. Finally, a self-same fibrous nanocomposite is demonstrated by dual electrospinning of P(St-co-GMA) and stabilized P(St-co-GMA)/PA-TBA, forming an intermingled nanofibrous mat, followed by a heating cycle. The product is a composite of crosslinked P(St-co-GMA)/PA-TBA fibers fused by P(St-co-GMA) matrix. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44090.

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Self‐healing and interfacially toughened carbon fibre‐epoxy composites based on electrospun core–shell nanofibres

Neisiany

Lee

Khorasani

et al. 2017

J of Applied Polymer Sci

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Dual components of a self‐healing epoxy system comprising a low viscosity epoxy resin, along with its amine based curing agent, were separately encapsulated in a polyacrylonitrile shell via coaxial electrospinning. These nanofiber layers were then incorporated between sheets of carbon fiber fabric during the wet layup process followed by vacuum‐assisted resin transfer molding to fabricate self‐healing carbon fiber composites. Mechanical analysis of the nanofiber toughened composites demonstrated an 11% improvement in tensile strength, 19% increase in short beam shear strength, 14% greater flexural strength, and a 4% gain in impact energy absorption compared to the control composite without nanofibers. Three point bending tests affirmed the spontaneous, room temperature healing characteristics of the nanofiber containing composites, with a 96% recovery in flexural strength observed 24 h after the initial bending fracture, and a 102% recovery recorded 24 h after the successive bending fracture. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44956.

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Influence of electrospun Nylon 6,6 nanofibrous mats on the interlaminar properties of Gr–epoxy composite laminates

Cited by 122 publications

References 18 publications

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

Supervised and non-supervised AE data classification of nanomodified CFRP during DCB tests

Stabilized electrospinning of heat stimuli/in situ crosslinkable nanofibers and their self‐same nanocomposites

Self‐healing and interfacially toughened carbon fibre‐epoxy composites based on electrospun core–shell nanofibres

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