The Influence of CNT Structural Parameters on the Properties of CNT and CNT-Reinforced Epoxy

Anvari, Ali

doi:10.1155/2020/4873426

Cited by 18 publications

(5 citation statements)

References 24 publications

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Section: Resultsmentioning

confidence: 99%

“…In Figure 10a, the carbon fibers display relatively neat fracture, indicating brittle fracture. This means that only a small amount of energy can be absorbed by the fracture of fibers and resin, indicating that the sample cannot dissipate vibration energy during vibration [26]. The absorbed energy of the PEI non-woven fabric composite increased to 3.8 J and the impact toughness was measured to be 135.3 KJ/m 2 .…”

Section: Impact Toughness Properties Of the Structural Damping Compos...mentioning

confidence: 99%

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Synchronous Improvement of Mechanical and Damping Properties of Structural Damping Composites with Polyetherimide Non-Woven Fabric Interlayers Loaded with Polydopamine and Carbon Nanotubes

Zhou

Lai

et al. 2023

Polymers

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Structural damping composites exhibit considerable potential in aerospace and other fields due to their excellent damping and vibration reduction performance, as well as their structural carrying capacity. However, conventional structural damping composite materials generally do not combine excellent mechanical and damping properties at the same time, which makes it difficult for them to meet the practical demand in engineering. In this paper, polyetherimide (PEI) non-woven fabric interlayer materials loaded with quantified polydopamine (PDA) and carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) were used to prepare carbon fiber-reinforced bismaleimide composites through the co-curing process. The mechanical and damping properties of the composites were systematically studied. The results demonstrate that PEI non-woven fabric interlayers loaded with PDA and MWCNTs-COOH can synchronously improve the mechanical and damping properties of the co-cured composites. The incorporation of carbon nanotubes and polydopamine during the co-curing process synergistically improves the flexural strength, flexural modulus, interlaminar shear strength, and impact fracture toughness of the composites. Most importantly, damping properties show an increase of 45.0% in the loss factor of the co-cured composites. Moreover, the reinforcement mechanism was investigated using the optical microscopy and scanning electron microscopy, which indicated that the PEI interlayers loaded with carbon nanotubes and polydopamine form a rich resin area between the layers of the composites.

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Section: Resultsmentioning

confidence: 99%

Section: Impact Toughness Properties Of the Structural Damping Compos...mentioning

confidence: 99%

Synchronous Improvement of Mechanical and Damping Properties of Structural Damping Composites with Polyetherimide Non-Woven Fabric Interlayers Loaded with Polydopamine and Carbon Nanotubes

Zhou

Lai

et al. 2023

Polymers

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“…The corresponding wall thickness,

, of the SWCNT is equal to

, thus keeping the ratio

constant at 3.44. This specific value of

is given by Anvari [ 66 ]. The dimensionless substrate-stiffness parameter,

, ranging from 1 to 100 is employed to vary the elastic substrate stiffness,

, and is defined as [ 50 ]:

where

represents a stiffness coefficient of the substrate medium and is defined as

.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Static and Free Vibration Analyses of Single-Walled Carbon Nanotube (SWCNT)–Substrate Medium Systems

et al. 2022

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This paper proposes a novel nanobar–substrate medium model for static and free vibration analyses of single-walled carbon nanotube (SWCNT) systems embedded in the elastic substrate medium. The modified strain-gradient elasticity theory is utilized to account for the material small-scale effect, while the Gurtin–Murdoch surface theory is employed to represent the surface energy effect. The Winkler foundation model is assigned to consider the interactive mechanism between the nanobar and its surrounding substrate medium. Hamilton’s principle is used to consistently derive the system governing equation, initial conditions, and classical as well as non-classical boundary conditions. Two numerical simulations are employed to demonstrate the essence of the material small-scale effect, the surface energy effect, and the surrounding substrate medium on static and free vibration responses of single-walled carbon nanotube (SWCNT)–substrate medium systems. The simulation results show that the material small-scale effect, the surface energy effect, and the interaction between the substrate and the structure led to a system-stiffness enhancement both in static and free vibration analyses.

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“…The data used to support the findings of this study are included within the following references [7,[13][14][15][16].…”

Section: Data Availabilitymentioning

confidence: 99%

“…The reasons that CNTs have attracted many industries are the excellent mechanical properties such as high aspect ratio, high Young's modulus, and high tensile strength [2]. Due to the mentioned CNT properties, recently, many experiments and studies have been conducted to analyze the structure, mechanics, and synthesis of the CNTs [3][4][5][6][7]. Furthermore, currently in the area of new material's characterization, an article has been published [8].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Thermal Cycling on the Tensile and Shear Behaviors of the Carbon Nanotube-Reinforced Epoxy

Anvari

Khanna

2021

International Journal of Aerospace Engineering

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The aim of this research is to study the tensile and shear properties and mechanical behavior of carbon nanotube- (CNT-) reinforced epoxy after the resulting composites have been exposed to different thermal cycling environments. Single-walled carbon nanotubes (SWCNTs) are cylindrical molecules that consist of rolled-up sheet of single-layer carbon atoms (graphene) with a diameter of less than 1 nanometer (nm). Thermal cycling environments can exist in many conditions, such as in-earth orbit for satellites which rotate around the earth and pass through the sun illumination and earth’s shadow, and for airplanes which fly in different altitudes with different temperatures. Carbon nanotube-reinforced epoxy is one of the nanocomposite materials which have been broadly used in many applications such as aerospace, automotive, electronics, and other industries. The goal of this study is to fabricate this nanocomposite with different multiwall and single-wall CNT concentrations and expose it to different thermal cycle numbers and determine the changes in tensile and shear properties and failure characteristics. For this purpose, tension and short-beam tests have been used in this research. The addition of multiwall CNT produces better mechanical properties compared to the use of SWCNT reinforcement. However, unreinforced epoxy showed the highest mechanical properties.

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The Influence of CNT Structural Parameters on the Properties of CNT and CNT-Reinforced Epoxy

Cited by 18 publications

References 24 publications

Synchronous Improvement of Mechanical and Damping Properties of Structural Damping Composites with Polyetherimide Non-Woven Fabric Interlayers Loaded with Polydopamine and Carbon Nanotubes

Synchronous Improvement of Mechanical and Damping Properties of Structural Damping Composites with Polyetherimide Non-Woven Fabric Interlayers Loaded with Polydopamine and Carbon Nanotubes

Static and Free Vibration Analyses of Single-Walled Carbon Nanotube (SWCNT)–Substrate Medium Systems

The Effect of Thermal Cycling on the Tensile and Shear Behaviors of the Carbon Nanotube-Reinforced Epoxy

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