Effect of gamma-irradiation on the mechanical properties of polyacrylonitrile-based carbon fiber

Xiao, H.; Lu, Youming; Wang, Mouhua; Qin, Xianying; Zhao, Weizhe; Luan, Jian

doi:10.1016/j.carbon.2012.09.054

Cited by 69 publications

(28 citation statements)

References 40 publications

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“…As could be seen in Table 2, in both two approaches, when the heat treatment temperature increased, the d 002 interlayer spacing decreased, i.e. the degree of graphitization of CNFs was enhanced [40]. It was indicated that the photocatalytic activity of composites might be improved owing to the increasing adsorptive property gradually.…”

Section: Crystal Structure and Morphology Of Cnfs@tio 2 Compositesmentioning

confidence: 88%

Microstructure and photocatalytic activity of electrospun carbon nanofibers decorated by TiO 2 nanoparticles from hydrothermal reaction/blended spinning

Wang

et al. 2016

Ceramics International

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Section: Crystal Structure and Morphology Of Cnfs@tio 2 Compositesmentioning

confidence: 88%

Microstructure and photocatalytic activity of electrospun carbon nanofibers decorated by TiO 2 nanoparticles from hydrothermal reaction/blended spinning

Wang

et al. 2016

Ceramics International

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“…Previous reports have demonstrated that pretreatments, such as chemicals modification [15][16][17], irradiation modification [18][19][20][21][22][23], and thermal modification [24][25][26], could tune the exothermic behavior and the structural evolution of PAN fibers during stabilization. The KMnO 4 has been a famous chemical modification on PAN fibers [15][16][17], which can induce oxidation of PAN molecules.…”

Section: Introductionmentioning

confidence: 99%

Structural Transformation of Polyacrylonitrile (PAN) Fibers during Rapid Thermal Pretreatment in Nitrogen Atmosphere

et al. 2020

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The modification before the stabilization process could tune the exothermic behavior and the structural evolution of PAN fibers during stabilization. In this study, we demonstrate that a rapid thermal pretreatment in nitrogen can effectively mitigate the exothermic behavior of PAN fibers, such as decreasing the initial temperature, broadening the exothermal peak, and decreasing the nominal heat release during heating the fibers in air. The color of fibers has shown gradual changes from white to light yellow, yellow and brown during thermal pretreatment in nitrogen with the increase of pretreating temperature and time. The differential scanning calorimetry (DSC), Fourier Transform Infrared Spectrometer (FTIR), X-ray diffraction (XRD), and Thermogravimetric Analysis (TG) characterization have been applied to analyze the thermal properties, chemical and physical structural difference between PAN, and thermally pretreated PAN fibers. The thermal pretreatment of PAN fibers in nitrogen could induce cyclization, dehydrogenation, and cross-linking reactions, in which the cyclization play an important role on improving the cyclization index of stabilized PAN fibers. Meanwhile, the pretreatment can result in noticeable changes of the aggregation structure of PAN fibers, as indicated by the increase of crystallinity and crystalline size. These structural modifications can benefit the main cyclization reaction during stabilization and enhance the carbon yield in resultant carbon fibers. The rapid thermal pretreatment in nitrogen could increase efficiency of modification on PAN fibers, and that could save much time and energy. It is beneficial to manufacture low-cost carbon fibers and to spread the applications of carbon fibers.

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“…The problem of surface inert has been studied by other investigators, and extensive studies have been devoted to the aramid fibers surface modification, a variety of techniques have been utilized to improve their interfacial adhesion. Those studies and techniques mainly involve chemical etching and grafting, plasma treatment, γ‐ray irradiation, coating methods and ultrasonic processing . These studies are mainly based upon classical approaches.…”

Section: Introductionmentioning

confidence: 99%

Surface ammonification of the mutual‐irradiated aramid fibers in 1,4‐dichlorobutane for improving interfacial properties with epoxy resin

Xie

Xing

Liu

et al. 2017

J of Applied Polymer Sci

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The mutual irradiated aramid fibers in 1,4-dichlorobutane was ammoniated by ammonia/alcohol solution, in an attempt to improve the interfacial properties between aramid fibers and epoxy matrix. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), dynamic contact angle analysis (DCA), interfacial shear strength (IFSS), and single fiber tensile testing were carried out to investigate the functionalization process of aramid fibers and the interfacial properties of the composites. Experimental results showed that the fiber surface elements content changed obviously as well as the roughness through the radiation and chemical reaction. The surface energy and IFSS of aramid fibers increased distinctly after the ammonification, respectively. The amino groups generated by ammonification enhanced the interfacial adhesion of composites effectively by participating in the epoxy resin curing. Moreover, benefited by the appropriate radiation, the tensile strength of aramid fibers was not affected at all.

show abstract

Effect of gamma-irradiation on the mechanical properties of polyacrylonitrile-based carbon fiber

Cited by 69 publications

References 40 publications

Microstructure and photocatalytic activity of electrospun carbon nanofibers decorated by TiO 2 nanoparticles from hydrothermal reaction/blended spinning

Microstructure and photocatalytic activity of electrospun carbon nanofibers decorated by TiO 2 nanoparticles from hydrothermal reaction/blended spinning

Structural Transformation of Polyacrylonitrile (PAN) Fibers during Rapid Thermal Pretreatment in Nitrogen Atmosphere

Surface ammonification of the mutual‐irradiated aramid fibers in 1,4‐dichlorobutane for improving interfacial properties with epoxy resin

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