Role of geometric shapes on the load transfer in graphene-PMMA nanocomposites

Ding, Peng; Wu, Jianyang; Zhang, Jie; Shao, Jinyou; Tang, Wanhong; Hou, Guozhen; Zhang, Liuyang; Chen, Xiaoming

doi:10.1016/j.commatsci.2020.109863

Cited by 4 publications

(2 citation statements)

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“…For that, the natural affinity between carbon allotropes and epoxy monomers, which can be chemically improved, has been utilized to promote the reinforcement/matrix interfacial adhesion [4][5][6][7]. The integrity of nanofillers and their content, shape, size, orientation, dispersion, and interaction with the epoxy matrix play an important role in the properties of nanocomposites [8][9][10][11][12]. As a result, an improved load transfer between the reinforcement and matrix can be achieved by optimizing these parameters.…”

Section: Introductionmentioning

confidence: 99%

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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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