An interfacial debonding-induced damage model for graphite nanoplatelet polymer composites

Safaei, Mohammad Reza; Sheidaei, Azadeh; Baniassadi, Majid; Ahzi, Saı̈d; Mashhadi, Mahmoud Mosavi; Pourboghrat, Farhang

doi:10.1016/j.commatsci.2014.08.036

Cited by 53 publications

(22 citation statements)

References 31 publications

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“…At high loading degrees, the strength will be decreased due to crack formations [152]. Results mentioned above, are consistent with other studies stating that the addition of nanoplatelets into the polymer matrixes can improve their stiffness and toughness and possibility of de-bonding at the interfaces at high volume fraction of the fillers [153].…”

Section: Strengthsupporting

confidence: 89%

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

Kashfipour

Mehra

Zhu

2018

Adv Compos Hybrid Mater

173

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Composite materials and especially polymer composites are widely used in daily life and different industries due to their vastly different properties and design flexibility. It is known that the properties of the composites are strongly related to the properties of its constituents. However, it has been reported in many studies, experimentally and by simulations, that the characteristics of the composites do not follow the rule of mixing. It means that in addition to properties of the constituents, there are other parameters affecting the final physicochemical properties of composites. The interfacial interactions between fillers and host is one of the factors which can strongly affect the properties of the composite. In this review, we summarized the type of interactions between the constituents, their improvement techniques, interaction measurement methods, and the effects of interfacial interactions on thermal, mechanical, and electrical properties of composites.

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Section: Strengthsupporting

confidence: 89%

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

Kashfipour

Mehra

Zhu

2018

Adv Compos Hybrid Mater

173

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“…In this way, direct reduction of GO sheets in the presence of exfoliated montmorillonite nanoplatelets is one of the ways applied to develop these waterdispersible composites. [28][29][30][31] The resulting clay-graphene systems prepared with these GNP may produce stable water dispersions of great interest for diverse applications, as for instance to obtain conductive paints and fl exible selfsupported composites provided of electrical conductivity. So, GO gives rise in an easy way to clay-composite dispersions of good stability but requiring elevated clay/GO (w/w) ratio (>10).…”

Section: Figurementioning

confidence: 99%

Clay‐Graphene Nanoplatelets Functional Conducting Composites

Ruiz‐Hitzky

Sobral

Gómez-Avilés

et al. 2016

Adv Funct Materials

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An approach to functionalize graphene-based materials has been developed by assembling graphene nanoplatelets (GNP) with clay minerals. Under convenient sonomechanical treatment, clay-GNP mixtures may produce very stable water dispersions in particular using sepiolite fi brous clay. While in the absence of clay a rapid decantation of GNP in water is observed, in the presence of sepiolite the resulting dispersions remain stable during months without syneresis effects. Rigid but fl exible self-supported fi lms are easily obtained by fi ltering of these dispersions. As the electrical percolation threshold corresponds to sepiolite/GNP composites of 0.5:1 in weight, doping these systems with multiwalled carbon nanotubes (MWCNTs) significantly enhances their electrical conductivity. The particular microporosity of the sepiolite component allows interactions with molecules, such as organic dyes, as well as polymers, such as biopolymers, opening the way to functional materials for advanced applications due to their inherent conductivity afforded by the GNP and MWCNTs carbonaceous components. In fact, using very small amount of MWCNT together with GNP can obtain composites with signifi cant electrical conductivity, maintaining the enhanced mechanical properties, at a lower cost.

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“…Recent molecular dynamics (MD) simulations [28] suggested that damage and debonding could occur after the perfect bonding between graphene and polyethylene (PE) (note that no covalent bonding was assumed at the interface in the simulations). A cohesive law in shear mode extracted from the MD simulations has been implemented in a continuum model to predict mechanical response of nanocomposites [29]. Experimentally, Srivastava et al [19] found interface debonding between graphene and polydimethylsiloxane in the nanocomposites using scanning electron microscopy and Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Cohesive-Shear-Lag Modeling of Interfacial Stress Transfer Between a Monolayer Graphene and a Polymer Substrate

Guo

Zhu

2015

Journal of Applied Mechanics

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Interfacial shear stress transfer of a monolayer graphene on top of a polymer substrate subjected to uniaxial tension was investigated by a cohesive zone model integrated with a shear-lag model. Strain distribution in the graphene flake was found to behave in three stages in general, bonded, damaged, and debonded, as a result of the interfacial stress transfer. By fitting the cohesive-shear-lag model to our experimental results, the interface properties were identified including interface stiffness (74 Tpa/m), shear strength (0.50 Mpa), and mode II fracture toughness (0.08 N/m). Parametric studies showed that larger interface stiffness and/or shear strength can lead to better stress transfer efficiency, and high fracture toughness can delay debonding from occurring. 3D finite element simulations were performed to capture the interfacial stress transfer in graphene flakes with realistic geometries. The present study can provide valuable insight and design guidelines for enhancing interfacial shear stress transfer in nanocomposites, stretchable electronics and other applications based on graphene and other 2D nanomaterials.

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An interfacial debonding-induced damage model for graphite nanoplatelet polymer composites

Cited by 53 publications

References 31 publications

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

A review on the role of interface in mechanical, thermal, and electrical properties of polymer composites

Clay‐Graphene Nanoplatelets Functional Conducting Composites

Cohesive-Shear-Lag Modeling of Interfacial Stress Transfer Between a Monolayer Graphene and a Polymer Substrate

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