Interfacial shear behavior of 3D composites reinforced with CNT-grafted carbon fibers

Yang, Lin; He, Xiaodong; Mei, Lei; Tong, Liyong; Wang, Rongguo; Li, Yibin

doi:10.1016/j.compositesa.2011.11.012

Cited by 37 publications

(13 citation statements)

References 14 publications

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“…Journal of Nanomaterials (IFSS) was reported for the first and the second method, respectively. The same tendency, using different constitutive materials, mixing techniques, and measurement tests, can be found in other reports; for example, Chandrasekaran et al [7] reported an increase of 36% on the IFSS, Godara et al of 36% [12], Sager et al of 71% [13], Lv et al of 175% [14], Yang et al of 190% [15], Li et al of 40% [16], and Wang et al of 71% [17]. Romanov et al [18][19][20] used modeling to explain the effect of CNTs in the fiber/matrix interface, showing that the CNTs suppress the stress concentrations on the microlevel of the composite and therefore the IFSS improvement; nevertheless, experimental evidence is not easy to obtain.…”

Section: Introductionsupporting

confidence: 76%

“…Romanov et al [18][19][20] used modeling to explain the effect of CNTs in the fiber/matrix interface, showing that the CNTs suppress the stress concentrations on the microlevel of the composite and therefore the IFSS improvement; nevertheless, experimental evidence is not easy to obtain. The overall increase should surely depend on the CNTs concentration, as shown numerically by Yang et al [15]; however, for nanoengineered reinforced composites obtained by mixing and liquid transfer molding techniques, the CNTs concentration does not generally go beyond 0.5 wt.% due to the filtering effect; see, for example, the work of Gojny et al [8] and Jiménez-Suárez et al [21]. These studies show an improvement in the mechanical properties with a concentration of 0.5% by weight of CNTs; increasing these values no improvements are observed and even some properties decrease.…”

Section: Introductionmentioning

confidence: 76%

See 1 more Smart Citation

Multiscale Characterization of Nanoengineered Fiber-Reinforced Composites: Effect of Carbon Nanotubes on the Out-of-Plane Mechanical Behavior

Medina

Fernández

Salas

et al. 2017

Journal of Nanomaterials

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The mechanical properties of the matrix and the fiber/matrix interface have a relevant influence over the mechanical properties of a composite. In this work, a glass fiber-reinforced composite is manufactured using a carbon nanotubes (CNTs) doped epoxy matrix. The influence of the CNTs on the material mechanical behavior is evaluated on the resin, on the fiber/matrix interface, and on the composite. On resin, the incorporation of CNTs increased the hardness by 6% and decreased the fracture toughness by 17%. On the fiber/matrix interface, the interfacial shear strength (IFSS) increased by 22% for the nanoengineered composite (nFRC). The influence of the CNTs on the composite behavior was evaluated by through-thickness compression, short beam flexural, and intraply fracture tests. The compressive strength increased by 6% for the nFRC, attributed to the rise of the matrix hardness and the fiber/matrix IFSS. In contrast, the interlaminar shear strength (ILSS) obtained from the short beam tests was reduced by 8% for the nFRC; this is attributed to the detriment of the matrix fracture toughness. The intraply fracture test showed no significant influence of the CNTs on the fracture energy; however, the failure mode changed from brittle to ductile in the presence of the CNTs.

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Section: Introductionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 76%

Multiscale Characterization of Nanoengineered Fiber-Reinforced Composites: Effect of Carbon Nanotubes on the Out-of-Plane Mechanical Behavior

Medina

Fernández

Salas

et al. 2017

Journal of Nanomaterials

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“…This value is also higher than an plasma treated high modulus carbon fibre (~40 MPa) [19]. Yang et al [20] report values in excess of 80 MPa for nanotube treated carbon fibres, using pull-out and fragmentation tests. Zhang et al [4] report values in excess of 100 MPa.…”

Section: Raman Spectroscopy Of Single Fibres and Model Compositesmentioning

confidence: 84%

Hybrid carbon fibre–carbon nanotube composite interfaces

Jin

Young

Eichhorn

2014

Composites Science and Technology

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Both low and high modulus carbon fibres are coated with carboxylated single wall carbon nanotubes (SWNTs). It is shown that it is then possible to follow, for the first time, the local deformation of low modulus carbon fibres and composite interfaces using Raman spectroscopy. By deforming coated single carbon fibre filaments in tension, and following the shift in the position of a band located at ~2660 cm -1 (2D band) it is possible to calibrate the local stress state of a fibre embedded in an epoxy resin. To follow the interface between the fibres and the epoxy resin, a thin film model composite is used. Point-to-point variation of stress along a single fibre, both inside and outside the resin, is recorded and stress transfer models are used to determine the 2 fibres due to an increased surface area as a result of the nanotubes and additional bonding caused due to the presence of carboxylate groups.

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“…[4] As an alternative, CNTs can be directly grafted onto carbon fibers (CNT-g-CFs), during synthesis, to form a hierarchical reinforcement, combining nanoscale and microscale reinforcements. Computational models of this type of hierarchical composites predict a net benefit when CNTs are present at the fiber surface, [5][6][7][8][9][10] through diffusion of stresses across the critical fibermatrix region, as found in some biological systems. [10] Another motivation for including CNTs in composites is to create a conductive network which can be used for in-situ damage detection.…”

Section: Introductionmentioning

confidence: 83%

Continuous carbon nanotube synthesis on charged carbon fibers

Anthony

Sui

Kellersztein

et al. 2018

Composites Part A: Applied Science and Manufacturing

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Carbon nanotube grafted carbon fibers (CNT-g-CFs) were prepared continuously, spool to spool, via thermal CVD. The application of an in-situ potential difference (300 V), between the fibers and a cylindrical graphite foil counter electrode, enhanced the growth, producing a uniform coverage of carbon nanotubes with diameter ca. 10 nm and length ca. 125 nm. Single fiber tensile tests show that this approach avoids the significant reduction of the underlying carbon fiber strengths, which is usually associated with CVD grafting processes. Single fiber fragmentation tests in epoxy, with in-situ video fragment detection, demonstrated that the CNT-g-CFs have the highest interfacial shear strength reported for such systems (101 ± 5 MPa), comparable to state-of-the-art sizing controls (103 ± 8 MPa).Single fiber pull-out data show similar trends. The short length of the grafted CNTs is particularly attractive for retaining the volume fraction of the primary fibers in composite applications.

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Interfacial shear behavior of 3D composites reinforced with CNT-grafted carbon fibers

Cited by 37 publications

References 14 publications

Multiscale Characterization of Nanoengineered Fiber-Reinforced Composites: Effect of Carbon Nanotubes on the Out-of-Plane Mechanical Behavior

Multiscale Characterization of Nanoengineered Fiber-Reinforced Composites: Effect of Carbon Nanotubes on the Out-of-Plane Mechanical Behavior

Hybrid carbon fibre–carbon nanotube composite interfaces

Continuous carbon nanotube synthesis on charged carbon fibers

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