Thermal conductivity of graphene nanoplatelet/cycloaliphatic epoxy composites: Multiscale modeling

Chinkanjanarot, Sorayot; Tomasi, Julie; King, Julia A.; Odegard, Gregory M.

doi:10.1016/j.carbon.2018.09.024

Cited by 47 publications

(12 citation statements)

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“…As MD modeling simulations can be computationally expensive for studying multiple case studies considering the wide range of composite material parameters, fast and efficient microscale computational approaches represent the typical tools for this purpose [49,50]. MD modeling combined with micromechanics has been used in computational studies to predict the mechanical properties of randomly dispersed graphene nanoplatelets in epoxy polymers [51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of Epoxy-Based Nanocomposites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

et al. 2021

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The impact on the mechanical properties of an epoxy resin reinforced with pristine graphene nanoplatelets (GNP), highly concentrated graphene oxide (GO), and functionalized graphene oxide (FGO) has been investigated in this study. Molecular dynamics (MD) using a reactive force field (ReaxFF) has been employed in predicting the effective mechanical properties of the interphase region of the three nanocomposite materials at the nanoscale level. A systematic computational approach to simulate the reinforcing nanoplatelets and probe their influence on the mechanical properties of the epoxy matrix is established. The modeling results indicate a significant degradation of the in-plane elastic Young’s (decreased by ~89%) and shear (decreased by ~72.5%) moduli of the nanocomposite when introducing large amounts of oxygen and functional groups to the robust sp2 structure of the GNP. However, the wrinkled morphology of GO and FGO improves the nanoplatelet-matrix interlocking mechanism, which produces a significant improvement in the out-of-plane shear modulus (increased by 2 orders of magnitudes). The influence of the nanoplatelet content and aspect ratio on the mechanical response of the nanocomposites has also been determined in this study. Generally, the predicted mechanical response of the bulk nanocomposite materials demonstrates an improvement with increasing nanoplatelet content and aspect ratio. The results show good agreement with experimental data available from the literature.

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Section: Introductionmentioning

confidence: 99%

Multiscale Modeling of Epoxy-Based Nanocomposites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

et al. 2021

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“…Compared to manipulating polymer chain alignment to form specic orientations [7][8][9] and yield high crystallinity 10,11 in the matrix to obtain high thermal conductivity, doping llers with high thermal conductivity into polymers is a simple and effective way to improve the thermal conductivity of composites. However, the type, [12][13][14][15] dimensions, [16][17][18][19] size 20,21 and concentration 22,23 of the ller are factors that play signicant roles in the thermal conductivity of composites. In addition to the above factors, two other important factors are the ller arrangement in the polymer matrix, [24][25][26][27] which forms thermal conduction pathways, and the interfacial thermal resistance caused by the poor dispersion and weak interaction of the ller.…”

Section: Introductionmentioning

confidence: 99%

Largely enhanced thermal conductivity and thermal stability of ultra high molecular weight polyethylene composites via BN/CNT synergy

et al. 2019

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“…[9,10] Graphene (Gr) has been widely concerned by researchers for its excellent properties such as specific surface area of 2630 m 2 /g, Young's modulus up to 1 TPa, electrical conductivity of 6 Â 10 5 S/m, and thermal conductivity up to 5300 W/mÁK. [11][12][13][14] Therefore, Gr and its derivatives are often used to enhance the mechanical properties, electrical and thermal conductivity of composites. [15][16][17] Among them, graphene oxide (GO) has been widely studied because of its outstanding dispersion.…”

Section: Introductionmentioning

confidence: 99%

Influence of graphene oxide content on the morphology and properties of carbon fiber/epoxy composites

Zhao

et al. 2021

Polymer Composites

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In this article, the influence of graphene oxide (GO) content on the morphology and properties of carbon fiber/epoxy (CF/EP) composites was investigated. To obtain CF/EP composites with uniform dispersion of GO, electromagnetic stirring and ultrasonic dispersion techniques were employed in the wet transfer process. Combined with a new molding process, CF/EP composites with different GO content were prepared. The test results showed that the bending strength of CF/EP composites could be effectively improved by adding GO, among which 0.5 wt% GO-CF/EP composite exhibited the best bending strength and modulus increased by 47.20% and 21.24%, up to 1158.9 MPa and 115.3 GPa. Likewise, the mode I interlaminar fracture toughness (G IC ) of the composite at the beginning of crack and the maximum during the propagation increased by 28.13% and 21.57%, reached 327.5 and 656.6 J/m 2 , respectively. The distribution of GO in the composites and the fracture morphology of the composites were observed. Finally, according to the test results and microscopic morphology analysis, the enhancement and failure mechanism of GO in CF/EP composites were clarified. It was found that GO could improve the properties of CF/EP composites by enhancing the interface properties of CF/matrix, enhancing the strength of the matrix and forming a net-like structure inside the matrix.

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Thermal conductivity of graphene nanoplatelet/cycloaliphatic epoxy composites: Multiscale modeling

Cited by 47 publications

References 47 publications

Multiscale Modeling of Epoxy-Based Nanocomposites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

Multiscale Modeling of Epoxy-Based Nanocomposites Reinforced with Functionalized and Non-Functionalized Graphene Nanoplatelets

Largely enhanced thermal conductivity and thermal stability of ultra high molecular weight polyethylene composites via BN/CNT synergy

Influence of graphene oxide content on the morphology and properties of carbon fiber/epoxy composites

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