Improving the interlaminar fracture toughness of carbon/epoxy laminates by directly incorporating with porous carbon nanotube buckypaper

Liu, Ling; Shen, Lulu; Zhou, Yexin

doi:10.1177/0731684415610919

Cited by 34 publications

(11 citation statements)

References 25 publications

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“…The fabricated buckypaper demonstrates low density 0.05–0.4 g/cm

and a high porosity of 0.8–0.9 [ 13 ]. The Young’s modulus and breaking strength of single-walled CNTs (SWCNTs) buckypapers are up to 4.2 GPa and 33 MPa, respectively [ 14 , 15 , 16 , 17 ]. Their mechanical properties could be further tuned by adjusting the density and the CNT diameter [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Length Governs the Viscoelasticity and Permeability of Buckypaper

et al. 2017

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Abstract:The effects of carbon nanotube (CNT) length on the viscoelasticity and permeability of buckypaper, composed of (5,5) single-walled CNTs (SWCNTs), are systematically explored through large-scale coarse-grained molecular dynamics simulations. The SWCNT length is found to have a pronounced impact on the structure of buckypapers. When the SWCNTs are short, they are found to form short bundles and to be tightly packed, exhibit high density and small pores, while long SWCNTs are entangled together at a low density accompanied by large pores. These structure variations contribute to distinct performances in the viscoelasticity of buckypapers. The energy dissipation for buckypapers with long SWCNTs under cyclic shear loading is dominated by the attachment and detachment between SWCNTs through a zipping-unzipping mechanism. Thus, the viscoelastic characteristics of buckypapers, such as storage and loss moduli, demonstrate frequency-and temperature-independent behaviors. In contrast, the sliding-friction mechanism controls the energy dissipation between short SWCNTs when the buckypaper is under loading and unloading processes. Friction between short SWCNTs monotonically increases with rising length of SWCNTs and temperature. Therefore, the tan δ, defined as the ratio of the loss modulus over the storage modulus, of buckypaper with short SWCNTs also increases with the increment of temperature or SWCNT length, before the SWCNTs are entangled together. The permeability of buckypapers is further investigated by studying the diffusion of structureless particles within buckypapers, denoted by the obstruction factor (β). It is found to be linearly dependent on the volume fraction of SWCNTs, signifying a mass-dominated permeability, regardless of the structure variations induced by different SWCNT lengths. The present study provides a comprehensive picture of the structure-property relationship for buckypapers composed of SWCNTs. The methodology could be used for designing multifunctional buckypaper-based devices.

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“…The fabricated buckypaper demonstrates low density 0.05–0.4 g/cm

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Length Governs the Viscoelasticity and Permeability of Buckypaper

et al. 2017

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“…As a result, the applied load can be effectively transferred from the matrix to the fiber reinforcement. [31][32][33][34][35][36][37] When the matrix is modified with MWCNTs, the slippage of different layers (especially between fibers and matrix) against applied load is restricted, resulting in better stress transferring to the fibers.…”

Section: Resultsmentioning

confidence: 99%

Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

Eslami‐Farsani

Shahrabi-Farahani

2017

Journal of Composite Materials

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Grid stiffened composite structures have been maturely developed in aircraft and automobile industries due to their excellence properties such as high specific strength, high specific stiffness, excellent energy absorption capability and corrosion resistance. In the current investigation, the effect of multi-walled carbon nanotubes addition in various weight percentages (0, 0.1, 0.25 and 0.4) on the flexural response of anisogrid composite panels was evaluated. For fabrication of the composite specimens, hand lay-up method was used where plain weave E-glass fibers and unidirectional carbon fibers impregnated to the epoxy resin that modified with multi-walled carbon nanotubes were used in the skin and rib parts, respectively. Experimental results from three-point bending test showed that with the addition of 0.4 wt.% of multi-walled carbon nanotubes, the maximum flexural load, flexural stiffness and energy absorption of anisogrid composite panels increased by 24%, 35% and 25%, respectively. Microscopic analyses revealed that the improvement in the flexural properties of anisogrid composite panels with the addition of multi-walled carbon nanotubes was due to improvement in the interfacial properties of matrix and fibers.

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“…The preparation of three-phase multifunctional FRPC based on CNT-BP can be considered a challenging task since a limited number of researches have been paying attention to it. Liu and co-workers [20] investigated the effect of CNT-BP, inserted at the middle plane of the carbon fiber/epoxy composite, on improving interlaminar fracture toughness. Increases by up to 74% (0.38-0.66 kJ/m 2 ) and 82% (1.28-2.33 kJ/m 2 ) were reported for G IC and G IIC , respectively.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

Ribeiro

Corredor

Costa

et al. 2020

Polymer Engineering & Sci

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In this work, multiwalled carbon nanotube buckypaper (MWCNT‐BP) was inserted at the middle‐plane of glass fiber/epoxy resin prepregs to obtain three‐phase nanostructured composite. Preliminary tests conducted by differential scanning calorimetry and thermogravimetric analyses (TGA) revealed that the proposed curing cycle to prepare the laminates in a hot compression‐molding machine was appropriated. The mechanical properties of the BP‐based composite studied by short beam shear and compression shear tests presented no improvements compared to the base laminate. On the other hand, the thermal properties of the nanostructured composite improved as demonstrated by dynamical mechanical analyses and TGA. Besides, the reflectivity results revealed an average value of −12.2 dB in the X‐band with a maximum attenuation of 99.4% of the incident wave at 9.5 GHz. The improvements in both thermal and electromagnetic properties demonstrate the potential for both structural and multifunctional applications of the obtained BP‐composite. POLYM. ENG. SCI., 60:740–751, 2020. © 2020 Society of Plastics Engineers

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Improving the interlaminar fracture toughness of carbon/epoxy laminates by directly incorporating with porous carbon nanotube buckypaper

Cited by 34 publications

References 25 publications

Carbon Nanotube Length Governs the Viscoelasticity and Permeability of Buckypaper

Carbon Nanotube Length Governs the Viscoelasticity and Permeability of Buckypaper

Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

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