Effect of Matrix Content on Mechanical and Thermal Properties of High Graphene Content Composites

Cilento, Fabrizia; Martone, Alfonso; Cristiano, Francesco; Fina, Alberto; Giordano, M.

doi:10.1051/matecconf/201930301002

Cited by 6 publications

(6 citation statements)

References 19 publications

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“…A rationale for this behaviour is found in the material's inner architecture. Morphological observations of previous works have revealed a maximum level of compaction in nanocomposites with 70 wt% of GNPs [57]. By increasing the filler content up to 90 wt%, the nanostructure is modified by the presence of dry spots and voids, as shown in the SEM images in Figure 7.…”

Section: Id η (T = 3 Days) η (T = 41 Days)mentioning

confidence: 71%

Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites

Cilento,

Palmieri,

Giusto

et al. 2023

Applied Sciences

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In the aerospace sector, structural and non-structural composite components are usually subjected to a wide range of environmental conditions. Among all, moisture can seriously damage these materials’ performance, reducing their mechanical, thermal, electrical, and physical properties as well as their service time. Lightweight protective barrier coatings capable of reducing the diffusion of gases and/or liquids in a material can improve the material’s resistance in humid environments. In this work, nanolamellar nanocomposites characterized by a high in-plane orientation of nanoplatelets have been employed as protective coatings for Kevlar sandwich panels, reproducing the construction of a nacelle engine. The effectiveness of the protection against water uptake of nanocomposites reinforced with graphite nanoplatelets (GNPs) at high filler contents (70, 80 and 90 wt%) has been investigated using moisture uptake and Ground-Air-Ground (GAG) tests in an environmental chamber. GNP coatings effectively work as barrier by generating highly tortuous paths for molecule diffusion. Results showed a dependence of the absorption on the coating composition and inner structure. Films @70 wt% GNPs showed the best protection against moisture uptake by delaying the phenomenon and reducing the absorption by −80% after 3 days and −35% after 41 days.

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Section: Id η (T = 3 Days) η (T = 41 Days)mentioning

confidence: 71%

Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites

Cilento,

Palmieri,

Giusto

et al. 2023

Applied Sciences

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“…This different distribution of heating in-plane and cross-plane, as evident from Figure 13, of the GNP layer, depends on the anisotropy of this material [35]. This different distribution of heating in-plane and cross-plane, as evident from Figure 13, of the GNP layer, depends on the anisotropy of this material [35]. This different distribution of heating in-plane and cross-plane, as evident from Figure 13, of the GNP layer, depends on the anisotropy of this material [35].…”

Section: Thermal Management By Gnp Nanocompositesmentioning

confidence: 93%

“…The presence of the GNP layer promotes the warm-up of the cell placed orthogonal to the triggered direction, while those directly adjacent are not affected by heating. This different distribution of heating in-plane and cross-plane, as evident from Figure 13, of the GNP layer, depends on the anisotropy of this material [35]. This different distribution of heating in-plane and cross-plane, as evident from Figure 13, of the GNP layer, depends on the anisotropy of this material [35].…”

Section: Thermal Management By Gnp Nanocompositesmentioning

confidence: 94%

Mitigation of Heat Propagation in a Battery Pack by Interstitial Graphite Nanoplatelet Layer: Coupled Electrochemical-Heat Transfer Model

Palmieri

Cilento

Siviello³

et al. 2022

J. Compos. Sci.

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The use of high thermal conductive materials for heat transfer is gaining attention as a suitable treatment for improving battery performance. Thermal runaway is a relevant issue for maintaining safety and for proficient employment of accumulators; therefore, new solutions for thermal management are mandatory. For this purpose, a hierarchical nanomaterial made of graphite nanoplatelet has been considered as an interface material. High-content graphite nanoplatelet films have very high thermal conductivity and might improve heat dissipation. This study investigates the effect of a thermally conductive material as a method for safety enhancement for a battery module. A numerical model based on the finite element method has been developed to predict the heat generation during a battery pack’s charge and discharge cycle, using the Multiphysics software Comsol. The lumped battery interface generates appropriate heat sources coupled to the Heat Transfer Interface in 3D geometry. Simulation results show that the protection of neighbouring cells from the interleaved layer is fundamental for avoiding heat propagation and an uncontrollable heating rise of the entire battery pack. The use of graphite nanocomposite sheets could effectively help to uniform the temperature and delay the TR propagation.

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“…However, the overall behaviour depends on the quality of stress transfer between the two phases and on their interactions. On the other hand, thermal and electrical properties depend only on the nature of the filler, due to the low amount of polymer, and are characterized by high anisotropy between in-plane and cross-plane conductivities [7,8]. In the literature, several attempts have been made to mimic and design artificial nacre.…”

Section: Engineering Materials Based On 2d Nanoparticlesmentioning

confidence: 99%

“…The most employed nanoparticles used as reinforcement are listed in Table 2, and a comparison in terms of costs, mechanical properties and thermal and electrical conductivities is presented. GO 2-5 layers 48 EUR/g 2-5 layer BET 420 m 2 /g 250 GPa [10] 72 W/mK with an oxidation degree of 0.35 [11] 270 S/m [12] [13] 670 W/mK with an oxidation degree of 0.05 [11] 4480 S/m [14] GNP 6-10 EUR/g >10 layer BET 30 m 2 /g 25-40 GPa [15] 300-470 W/mK [8] 2 × 10 6 S/m [16] MTM <1 EUR/g BET 750 m 2 very high (nm × µm) aspect ratio 207 GPa [17] 16 W/m [18] 25 to 100 mS/m [18] A huge number of papers based on graphitic nanoparticles can be found in the literature. After its discovery in 2004 by the scientists Geim and Novoselov, graphene has been in the spotlight involving many researchers for possible applications in several industrial sectors thanks to its outstanding electronic, optical, thermal and mechanical properties.…”

Section: Engineering Materials Based On 2d Nanoparticlesmentioning

confidence: 99%

Insights on Shear Transfer Efficiency in “Brick-and-Mortar” Composites Made of 2D Carbon Nanoparticles

2022

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Achieving high mechanical performances in nanocomposites reinforced with lamellar fillers has been a great challenge in the last decade. Many efforts have been made to fabricate synthetic materials whose properties resemble those of the reinforcement. To achieve this, special architectures have been considered mimicking existing materials, such as nacre. However, achieving the desired performances is challenging since the mechanical response of the material is influenced by many factors, such as the filler content, the matrix molecular mobility and the compatibility between the two phases. Most importantly, the properties of a macroscopic bulk material strongly depend on the interaction at atomic levels and on their synergetic effect. In particular, the formation of highly-ordered brick-and-mortar structures depends on the interaction forces between the two phases. Consequently, poor mechanical performances of the material are associated with interface issues and low stress transfer from the matrix to the nanoparticles. Therefore, improvement of the interface at the chemical level enhances the mechanical response of the material. The purpose of this review is to give insight into the stress transfer mechanism in high filler content composites reinforced with 2D carbon nanoparticles and to describe the parameters that influence the efficiency of stress transfer and the strategies to improve it.

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Effect of Matrix Content on Mechanical and Thermal Properties of High Graphene Content Composites

Cited by 6 publications

References 19 publications

Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites

Graphite Nanoplatelets Nanostructured Films as Multifunctional Protective Layer in Kevlar/Nomex Sandwich Composites

Mitigation of Heat Propagation in a Battery Pack by Interstitial Graphite Nanoplatelet Layer: Coupled Electrochemical-Heat Transfer Model

Insights on Shear Transfer Efficiency in “Brick-and-Mortar” Composites Made of 2D Carbon Nanoparticles

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