Temperature-dependent tensile strength of CNT/polymer nanocomposites considering the effects of CNT networks and waviness: Characterization and modeling

Zhang, Xu-Yao; Li, Weiguo; Yang, Mengqing; Zhao, Zhongyong; He, Yan; Zheng, Shifeng; Ma, Jianzuo; Chen, Liming

doi:10.1016/j.polymer.2022.125526

Cited by 4 publications

(3 citation statements)

References 62 publications

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“…It is known that the Young’s modulus of the PE and PE nanocomposites would vary with many parameters including temperature, strain rate, chain length of PE, and the volume fraction. Based on this fact, the obtained values of the Young’s modulus were generally in good accordance with previous studies [ 14 , 27 , 40 ]. Compared to pure PE, the CNT-junction/PE nanocomposite had a significantly higher Young’s modulus, with an increment of about 400%.…”

Section: Resultssupporting

confidence: 91%

“…were generally in good accordance with previous studies [14,27,40]. Compared to pure PE, the CNT-junction/PE nanocomposite had a significantly higher Young's modulus, with an increment of about 400%.…”

Section: Reinforcement Efficiency Of the Cnt Junction Compared To Pur...supporting

confidence: 92%

“…Another study explored the effect of the structure, arrangement, and dispersion of pillared graphene on the tensile mechanical properties of PE nanocomposites [ 26 ]. Apart from that, in the study of [ 27 ], an analytical model was proposed to forecast the temperature-dependent tensile strength of CNT/polymer nanocomposites, and the effects of the CNT network were considered. It was concluded that forming the network structure is beneficial to improving the tensile strength of CNT/polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Role of the Carbon Nanotube Junction in the Mechanical Performance of Carbon Nanotube/Polyethylene Nanocomposites: A Molecular Dynamics Study

Shi,

He,

Liu

2024

Nanomaterials

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Carbon nanotube (CNT)-based networks are promising reinforcements for polymer nanocomposites without the issue of CNT agglomeration. In this study, the CNT junction, a vital and representative structure of CNT-based networks, was applied as the reinforcement of the polyethylene (PE) matrix. The tensile properties of the CNT-junction/PE nanocomposite were investigated via molecular dynamics (MD) simulations and compared with those of pure PE matrix and conventional CNT/PE nanocomposites. The CNT junction was found to significantly increase the mechanical properties of the PE matrix. The Young’s modulus, yield strength, and toughness rose by 500%, 100%, and 200%, respectively. This mechanism is related to the enhanced interfacial energy, which makes the polymer matrix denser and stimulates the bond and angle deformations of the polymer chains. Furthermore, the CNT junction demonstrated a more profitable reinforcement efficiency compared to conventional straight CNTs in the PE matrix. Compared to the ordinary CNT/PE model, the improvements in the Young’s modulus and toughness induced by the CNT junction were up to 60% and 25%. This is attributed to the reduced mobility induced by the geometry of the CNT junction and stronger interfacial interactions provided by the Stone–Wales defects of the CNT junction, slowing down the void propagation of the nanocomposite. With the understanding of the beneficial reinforcing effect of the CNT junction, this study provides valuable insights for the design and application of CNT-based networks in polymer nanocomposites.

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Section: Resultssupporting

confidence: 91%

Section: Reinforcement Efficiency Of the Cnt Junction Compared To Pur...supporting

confidence: 92%