Influence of surface defects on the tensile strength of carbon fibers

Vautard, Frédéric; Dentzer, Joseph; Nardin, M.; Schultz, J.; Defoort, Brigitte

doi:10.1016/j.apsusc.2014.10.066

Cited by 65 publications

(33 citation statements)

References 34 publications

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“…3b according to the reference 19, 20, especially for the CF8-ACP-Xh in all cases. The peak located at~1,200 cm −1 may corresponding to C-H covalent bonds [20] or C-C and C=C stretching vibrations [21], and the peak located at~1,500 cm −1 denominated as D2 peak which originates from the amorphous carbon fraction, organic molecules or functional groups on the fiber surface [22,23]. These results indicated that the microstructure of fiber surfaces have been indeed changed after grafting with polyphosphazene.…”

Section: Resultsmentioning

confidence: 81%

Manipulating Interfacial Strength of Polyphosphazene Functionalized Carbon Fiber Composites

Cheng

Luo

et al. 2019

Polymer Composites

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To gain a better understand the correlation between the amount of polar functional groups and interfacial properties, we propose to functionalize carbon fiber (CF) with amine‐capped cross‐linked polyphosphazene (ACP) and tailor the polycondensation time, aiming to control the amount of amine groups on CF surface. The chemical composition and surface morphology of modified CF were systematically investigated. The results show that the ACP was uniformly distributed on CF surfaces. X‐ray photoelectron spectroscopy results confirmed that the quantity of amine groups is proportional to that of grafted ACP as the reaction time prolong, and it reaches the plateau when the reaction time exceed 35 h. The microbond testing results reveal a positive correlation of the amount of amine groups and interfacial shear strength, and the ACP‐grafted CF with 35 h reinforced composites possess best IFSS (92.1 MPa), with an increase of about 33.5% compared with that of oxidized CF‐reinforced composites. POLYM. COMPOS., 40:E1831–E1839, 2019. © 2019 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 81%

Manipulating Interfacial Strength of Polyphosphazene Functionalized Carbon Fiber Composites

Cheng

Luo

et al. 2019

Polymer Composites

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“…15 On the other side, long treatment time may increase the population of critical flaws on the fiber surface so that the pristine tensile property of carbon fiber is reduced. 23 The similar surface of carbon fibers treated from 1.5 to 3.5 h may be attributed to pitch-based texture has high degree of graphitization and is comparatively inert to chemical modification. Figure 2 illustrates the evolution of XRD profiles of carbon fiber exposed to ozone for different time.…”

Section: Resultsmentioning

confidence: 98%

Influence of ozone treatment on microstructure and mechanical properties of pitch-based short carbon fiber-reinforced natural rubber

Cheng

Zhao

2016

Journal of Elastomers & Plastics

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Composites of natural rubber (NR) reinforced with short carbon fibers (SCF) were prepared with two-roll open mill. Ozone treatment of carbon fibers was used to improve the interfacial interaction between fiber and matrix through chemical bonding and physical interlocking. The effect of treatment time on morphology and chemical component of SCF surface and mechanical properties of composites were thoroughly discussed. Results indicated that ozone treatment increased the surface roughness and the number of oxygencontaining groups. Compared with untreated SCF, tensile strength of NR-loaded SCF oxidized for 2.5 h reached the maximum values 26.9 MPa, and the increasing rate was 44.6%.

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“…Pore defects in the PAN precursor fibers are the main cause of reduction in tensile strength . Figure shows the HRTEM morphology of the PAN fiber longitudinal ultrathin section.…”

Section: Resultsmentioning

confidence: 99%

“…Pore defects in the PAN precursor fibers are the main cause of reduction in tensile strength. [27][28][29] Figure 3 shows the HRTEM morphology of the PAN fiber longitudinal ultrathin section. The pore structures were unevenly distributed in the PAN Fiber S1 [ Figure 3(a)], which were formed due to the removal of the residual DMSO solvent from the fibers leaving behind open pores, and originated from the coagulation process.…”

Section: Evolution Of the Pore Structures Of The Pan Fibersmentioning

confidence: 99%

Correlation between fibril structures and mechanical properties of polyacrylonitrile fibers during the dry‐jet wet spinning process

Gao

Jiang

Wang

et al. 2018

J of Applied Polymer Sci

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The high quality polyacrylonitrile (PAN) fibers, which were used to manufacture the high performance carbon fibers, were prepared by the dry‐jet wet spinning process. The fiber samples were treated by using the ultrathin sectioning and solution etching methods. Subsequently, the changes of the fibril structures and mechanical properties were investigated by utilizing scanning electron microscopy, high‐resolution transmission electron microscopy and mechanical tester. The fiber titer and diameters, the amount of the pores decreased during the spinning process. The microfibrils were oriented along the fiber axis to form the fiber backbone in PAN fibers. Furthermore, the microfibrils with small size were incorporated into the large fibrils and some fold chains formed the interfibril transverse joint bridges to reinforce the connection of the fibril elements. The fibrils served as self‐reinforcing element to efficiently resist the cracks propagation and dissipate much energy to increase the tensile strength and initial modulus. Consequently, the PAN precursor fibers with the homogeneous, compact, well‐oriented, and closely interlinked fibrils, presented high tensile strength and initial modulus. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47336.

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Influence of surface defects on the tensile strength of carbon fibers

Cited by 65 publications

References 34 publications

Manipulating Interfacial Strength of Polyphosphazene Functionalized Carbon Fiber Composites

Manipulating Interfacial Strength of Polyphosphazene Functionalized Carbon Fiber Composites

Influence of ozone treatment on microstructure and mechanical properties of pitch-based short carbon fiber-reinforced natural rubber

Correlation between fibril structures and mechanical properties of polyacrylonitrile fibers during the dry‐jet wet spinning process

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