Mechanical and physical properties of epoxy composites reinforced by vapor grown carbon nanofibers

Choi, Young-Kuk; Sugimoto, Koh‐ichi; Song, Sung-Moo; Gotoh, Yasuo; Ohkoshi, Yutaka; Endo, Morinobu

doi:10.1016/j.carbon.2005.03.036

Cited by 311 publications

(154 citation statements)

References 21 publications

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“…The other one, voids may have also decreased the strength. Choi and Gojny reported that few voids were produced during the fabrication process and that voids increased with the higher nanoparticle contents [25,26]. Fracture toughness of neat and nanophased epoxy was determined from static three-point tests of the single edge notch specimens.…”

Section: Mechanical Responsementioning

confidence: 99%

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

Zhou¹,

Wu²,

Cheng³

et al. 2008

Express Polym. Lett.

179

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In this study, electrical, thermal and mechanical properties of multi-walled carbon nanotubes (CNTs) reinforced Epon 862 epoxy have been evaluated. Firstly, 0.1, 0.2, 0.3, and 0.4 wt% CNT were infused into epoxy through a high intensity ultrasonic liquid processor and then mixed with EpiCure curing agent W using a high speed mechanical agitator. Electric conductivity, dynamic mechanical analysis (DMA), three point bending tests and fracture tests were then performed on unfilled, CNT-filled epoxy to identify the loading effect on the properties of materials. Experimental results show significant improvement in electric conductivity. The resistivity of epoxy decreased from 1014 Ω•m of neat epoxy to 10 Ω•m with 0.4% CNT. The experimental results also indicate that the frequency dependent behavior of CNT/epoxy nanocomposite can be modeled by R-C circuit, permittivity of material increase with increasing of CNT content. DMA studies revealed that filling the carbon nanotube into epoxy can produce a 90% enhancement in storage modulus and a 17°C increase in Tg. Mechanical test results showed that modulus increased with higher CNT loading percentages, but the 0.3 wt% CNT-infusion system showed the maximum strength and fracture toughness enhancement. The decrease in strength and fracture toughness in 0.4% CNT/epoxy was attributed to poor dispersions of nanotubes in the composite

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Section: Mechanical Responsementioning

confidence: 99%

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

Zhou¹,

Wu²,

Cheng³

et al. 2008

Express Polym. Lett.

179

View full text Add to dashboard Cite

show abstract

“…With the great progress achieved in this field, CNTs have been used to synthesize not only various polymer/CNTs composites [4][5][6][7][8] but also various CNTs/metal oxide hybrids [9][10][11][12][13], where CNTs can serve as high-performance supporting materials. The decoration of CNTs with metal oxide nanoparticles can give them new properties and potentials for various applications [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes/magnetite hybrids prepared by a facile synthesis process and their magnetic properties

Zhang

Natsuki

et al. 2009

Applied Surface Science

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In this paper, a facile synthesis process is proposed to prepare multi-walled carbon nanotubes/magnetite (MWCNTs/Fe 3 O 4 ) hybrids. The process involves two steps: 1) water-soluble CNTs are synthesized by one-pot modification using potassium persulfate (KPS) as oxidant. 2) Fe 3 O 4 is assembled along the treated CNTs by employing a facile hydrothermal process with the presence of hydrazine hydrate as the mineralizer. The treated CNTs can be easily dispersed in aqueous solvent. Moreover, X-ray photoelectron spectroscopy (XPS) analysis reveals that several functional groups such as potassium carboxylate (-COOK), carbonyl (-C=O) and hydroxyl (-C-OH) groups are formed on the nanotube surfaces. The MWCNTs/Fe 3 O 4 hybrids are characterized with respect to crystal structure, morphology, element composition and magnetic property by x-ray diffraction (XRD), transmission electron microscopy (TEM), XPS and superconducting quantum interference device (SQUID) magnetometer. XRD and TEM results show that the Fe 3 O 4 nanoparticles with diameter in the range of 20-60 nm were firmly assembled on the nanotube surface. The magnetic property investigation indicated that the CNTs/Fe 3 O 4 hybrids exhibit a ferromagnetic behavior and possess a saturation magnetization of 32.2 emu/g. Further investigation indicates that the size of assembled Fe 3 O 4 nanoparticles can be turned by varying experiment factors. Moreover, a probable growth mechanism for the preparation of CNTs/Fe 3 O 4 hybrids was discussed.

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“…Recently, Carbon nanotubes (CNTs) and Carbon nanofibers (CNFs) are considered as the ideal reinforcement fillers for preparing nanocomposites owing to their outstanding mechanical characteristics, extremely large interfacial contact area, high aspect ratio, and low mass density [14][15][16][17][18]. Some literatures have been reported on the preparation and properties of polymer nanocomposites reinforced by CNTs or CNFs, including Polyimide/MWCNTs [14], PTFE/CNFs [15], Epoxy/VGCFs [16], PP/CNFs [17], and Polyol/CNFs [18]. However, polybenzimidazole nanocomposites have few reports up to now.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and mechanical properties of polybenzimidazole nanocomposites reinforced by vapor grown carbon nanofibers

Zhang

Shiga³

et al. 2009

Polymer Composites

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Polybenzimidazole (PBI) nanocomposites containing 0.5-5 wt% vapor grown carbon nanofibers (VGNFs) were successfully synthesized by solvent evaporation method. Fracture morphology examination confirmed the uniform dispersion of VGNFs in the matrix. The mechanical properties of neat PBI and the nanocomposites were systematically measured by tensile test, dynamic mechanical analysis (DMA), hardness measurement and friction test. Tensile tests revealed that Young's modulus increased by about 36.7% at 2 wt% VGNFs loading, and further Correspondence to: Qing-Qing Ni; e-mail: niqq@shinshu-u.ac.jp modulus growth was observed at higher filler loadings. DMA studies showed that the nanocomposites have higher storage modulus than neat PBI in the temperature range of 30-350 C, holding storage modulus larger than 1.54 GPa below 300 C. Outstanding improvement of hardness was achieved for polybenzimidazole upon incorporating 2 wt% of VGNFs. The results of friction test showed that coefficient of friction of polybenzimidazole nanocomposites decreased with VGNFs content compared to neat PBI.

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Mechanical and physical properties of epoxy composites reinforced by vapor grown carbon nanofibers

Cited by 311 publications

References 21 publications

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

Carbon nanotubes/magnetite hybrids prepared by a facile synthesis process and their magnetic properties

Synthesis and mechanical properties of polybenzimidazole nanocomposites reinforced by vapor grown carbon nanofibers

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