Influence of high temperature and pressure ammonia solution treatment on interfacial behavior of carbon fiber/epoxy resin composites

Lian, Meng; Chen, Z. W.; Song, Xueyu; Liang, Yunhong; Huang, Yu Dong; Zhu, Jiang

doi:10.1002/app.30062

Cited by 17 publications

(11 citation statements)

References 18 publications

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“…However, a large number of studies have shown that the surfaces of carbon fibers exhibit inertness, and the interfacial adhesion between carbon fibers and organic resin matrix is generally very weak (Meng et al 2009;Xu et al 2007;Lu et al 2007). Hence, how to improve the interfacial adhesion between carbon fibers and resin matrix has been one of the most important topics of developing advanced composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Khan¹,

Gupta²,

Madusari³

et al. 2013

BioResources

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a Carbon fibers were synthesized using a low-cost, economical method. Fresh rubber wood fibers (Hevea brasiliensis) were burned using a furnace in an inert condition at 350 to 450 o C for 2-4 hours, and after that the fibers were ground at 18000 rpm for 20 to 40 seconds. The effect of carbon fibers as a reinforcement agent on mechanical, physical, and morphological properties was investigated. In the composite preparation, carbon fiber dosages (0, 0.1, 0.25, and 0.5 wt.%) were used as variable factors, along with a urea formaldehyde content of 10%. The morphology of the specimens was characterized using X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and Field Emission Scanning Electron Microscopy (FESEM). The mechanical tests indicated that when carbon fibers were added, the modulus of rupture (MOR) and internal bonding strength (IB) improved significantly. From the TGA graph it was observed that the thermal stability of the composites based on carbon fiber was higher than composites without it. The thermocouple readings showed that at a higher loading of carbon, the core temperature of the board increased faster than for the control board.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Khan¹,

Gupta²,

Madusari³

et al. 2013

BioResources

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show abstract

“…Strong interface adhesion guarantees efficient load transfer from the resin matrix to carbon fibers with high strength and stiffness so that the advantages of the reinforcements can be brought into full play. However, substantial studies have proved that carbon fibers have inert surfaces and always achieve weak adhesion to the organic resin matrix [16][17][18], leading to the occurrence of interfacial failure, such as interface debonding and fiber pull-out. Many surface modification techniques, such as oxidation, electrochemical, and plasma treatments, are developed in order to increase the chemical functions and roughness on the carbon fiber's surface; thus the chemical and physical interactions between carbon fiber and resin matrix can be strengthened.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites

Yin¹,

Chen

2013

Journal of Applied Mechanics

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Surface modifications are known as efficient technologies for advanced carbon fibers to achieve significant improvement of inteiface adhesion in composites, one of which is to increase the surface roughness in the fiber's longitudinal direction in practice. As a result, many microridges and grooves are produced on carbon fiber's surfaces. How does the surface roughness influence the carbon fiber's pull-out behavior? Are there any restrictions on the relation between the aspect ratio and suiface roughness of fibers in order to obtain an optimal interface? Considering the real morphology on carbon fiber's swface, i.e., longitudinal roughness, an improved shear-lag theoretical model is developed in this paper in order to investigate the interface characteristics and fiber pull-out for carbon fiber-reinforced thermosetting epoxy resin (brittle) composites. Closed-form solutions to the carbon fiber stress are obtained as well as the analytical loaddisplacement relation during pullout, and the apparent interfacial shear strength (IFSS). It is found that the interfacial adhesion and the apparent IFSS are effectively strengthened and improved due to the suiface roughness of carbon fibers. Under a given tensile load, an increasing roughness will result in a decreasing fiber stress in the debonded zone and a decreasing debonded length. Furthermore, it is interesting to find that, for a determined suiface roughness, an optimal aspect ratio, about 30^45, cjf carbon fibers exists, at which the apparent IFSS could achieve the maximum. Comparison to the existing experiments shows that the theoretical model is feasible and reasonable to predict the experimental results, and the theoretical results should have an instructive significance for practical designs of carboniepoxy composites.

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“…A large number of techniques have been reported to modify the surface of CFs, ranging from the wet chemical processes [4][5][6] to sophisticated RF plasmas, 7 electron beam irradiation, 8 and multistep treatments. 9 However, some of these processes reduce the tensile strength of the fibers, while others are complex, expensive, or inappropriate for large scale implementation.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization of carbon fibers with active screen plasma

Gallo

Charitidis

Dong

2017

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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The active screen plasma technology was used to functionalize carbon fibers and vitreous carbon disks. The plasma treatment conditions were mapped using optical emission spectroscopy and the functionalized surfaces were analyzed using scanning electron microscopy and atomic force microscopy, x-ray photoelectron spectroscopy, and contact angle measurements. A relationship was found between the active species in the plasma and the functional groups attached to the carbon surfaces, which provides valuable information for the optimization of the active screen plasma treatment. Moreover, the surface analyses were repeated over a period of 28 days to study the aging of the functionalized surfaces in air. The hydrophobic recovery was modeled using a surface restructuring theory which revealed a mean lifetime of 3.4 days for the functional groups. V

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Influence of high temperature and pressure ammonia solution treatment on interfacial behavior of carbon fiber/epoxy resin composites

Cited by 17 publications

References 18 publications

Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Synthesis and Characterization of Carbon Fibers and their Application in Wood Composites

Effects of the Longitudinal Surface Roughness on Fiber Pull-Out Behavior in Carbon Fiber-Reinforced Epoxy Resin Composites

Surface functionalization of carbon fibers with active screen plasma

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