Low-temperature grafting of carbon nanotubes on carbon fibers using a bimetallic floating catalyst

Lee, Geunsung; Youk, Ji Ho; Lee, Jin‐Yong; Sul, In Hwan; Yu, Woong‐Ryeol

doi:10.1016/j.diamond.2016.06.012

Cited by 33 publications

(12 citation statements)

References 34 publications

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“…Greef et al [ 22 ] have found that bimetallic catalysts were more efficient and caused less surface damage than mono-metallic ones. The use of a bimetallic catalyst even led to the growth of CNTs at low temperatures to avoid the diffusion of the catalyst particles into CFs [ 27 ]. However, the results in this study exhibited that pre-immersion of cobalt(II) acetate solution for ACFs caused the growth of CNs with a less uniform diameter and an inferior degree of graphitization.…”

Section: Resultsmentioning

confidence: 99%

Enhanced CO2 Adsorption on Activated Carbon Fibers Grafted with Nitrogen-Doped Carbon Nanotubes

et al. 2017

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In this paper, multiscale composites formed by grafting N-doped carbon nanotubes (CNs) on the surface of polyamide (PAN)-based activated carbon fibers (ACFs) were investigated and their adsorption performance for CO2 was determined. The spaghetti-like and randomly oriented CNs were homogeneously grown onto ACFs. The pre-immersion of cobalt(II) ions for ACFs made the CNs grow above with a large pore size distribution, decreased the oxidation resistance, and exhibited different predominant N-functionalities after chemical vapor deposition processes. Specifically, the CNs grafted on ACFs with or without pre-immersion of cobalt(II) ions were characterized by the pyridine-like structures of six-member rings or pyrrolic/amine moieties, respectively. In addition, the loss of microporosity on the specific surface area and pore volume exceeded the gain from the generation of the defects from CNs. The adsorption capacity of CO2 decreased gradually with increasing temperature, implying that CO2 adsorption was exothermic. The adsorption capacities of CO2 at 25 °C and 1 atm were between 1.53 and 1.92 mmol/g and the Freundlich equation fit the adsorption data well. The isosteric enthalpy of adsorption, implying physical adsorption, indicated that the growth of CNTs on the ACFs benefit CO2 adsorption.

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Section: Resultsmentioning

confidence: 99%

Enhanced CO2 Adsorption on Activated Carbon Fibers Grafted with Nitrogen-Doped Carbon Nanotubes

et al. 2017

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“…In this case, the interface shear strength is enhanced considerably (∼470%). The use of a Ni-Fe bimetallic catalyst was key in the synthesis of CNTs at a relatively low (500°C) temperature [28]. Under these conditions, diffusion of the catalyst into carbon fibers during CVD was inhibited, promoting uniform growth of CNTs only on the surface and minimizing internal structural changes in the fibers.…”

Section: Cvdmentioning

confidence: 99%

Strengthening of Fibrous Composites with Nanoparticles

Иржак

2021

Russ. J. Phys. Chem.

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“…A strong fiber-matrix interface is an important aspect for maximizing the structural performance of CFRP. Introducing nanostructures on the fiber, such as oriented carbon nanotubes (CNTs) [10][11][12][13][14][15][16], Appl. Sci.…”

Section: Introductionmentioning

confidence: 99%

Enhanced out of Plane Electrical Conductivity in Polymer Composites Induced by CO2 Laser Irradiation of Carbon Fibers

et al. 2020

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The creation of a hierarchical interface between the carbon fiber (CF) and the epoxy resin matrix of fiber-reinforced polymer (CFRP) composites has become an effective strategy for introducing multifunctional properties. Although the efficacy of many hierarchical interfaces has been established in lab-scale, their production is not amenable to high-volume, continuous, cost effective fiber production, which is required for the large-scale commercialization of composites. This work investigates the use of commercially available CO2 laser as a means of nano-structuring the surface of carbon fiber (CF) tows in an incessant throughput procedure. Even though the single carbon fiber tensile strength measurements showed a decrease up to 68% for the exposed CFs, the electrical conductivity exhibited an increment up to 18.4%. Furthermore, results on laminates comprised of irradiated unidirectional CF cloth, demonstrated an enhancement in out of plane electrical conductivity up to 43%, while preserved the Mode-I interlaminar fracture toughness of the composite, showing the potential for multifunctionality. This work indicates that the laser-induced graphitization of the CF surface can act as an interface for fast and cost-effective manufacturing of multifunctional CFRP composite materials.

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Low-temperature grafting of carbon nanotubes on carbon fibers using a bimetallic floating catalyst

Cited by 33 publications

References 34 publications

Enhanced CO2 Adsorption on Activated Carbon Fibers Grafted with Nitrogen-Doped Carbon Nanotubes

Enhanced CO2 Adsorption on Activated Carbon Fibers Grafted with Nitrogen-Doped Carbon Nanotubes

Strengthening of Fibrous Composites with Nanoparticles

Enhanced out of Plane Electrical Conductivity in Polymer Composites Induced by CO2 Laser Irradiation of Carbon Fibers

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