The Characterization of Different Doses of Electron Beam Irradiation on the Structure and Properties of PAN Precursor Fibers

Yu, Hong; Yuan, Hui Wu; Wang, Yuan Sheng; Zheng, Wei

doi:10.4028/www.scientific.net/amr.328-330.1594

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…Preparation of nanometer SiO 2 . The various SiO 2 nanoparticles were prepared through a sol-gel process by using novolac as a template agent [5,6,7].…”

Section: Advanced Materials Researchmentioning

confidence: 99%

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Mechanical and Tribological Properties of Phenol Formaldehyde Resin Reinforced with Nano-Silica

Wei

2011

AMR

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Reinforced phenol formaldehyde resin (PF) matrix nanocomposites with different nano-SiO2 were fabricated with two-roll compounding and compression molding technology. The mechanical and tribological behaviors of the reinforced composites were studied. The friction and wear experiments were tested on a constant speed machine (D-SM). The impact and flexural strength of nanocomposites were increased by the addition of various types of SiO2, but the flexural modulus was decreased. The effects of the addition of various types of SiO2 on tribological properties of the composites were explored in this study. The results showed that the coefficient of friction of the composites increased, while the wear rate values decreased at various temperatures. Microstructure of worn surface of the tested composites was observed by scanning electronic microscope (SEM) and the wear mechanism of the reinforced composites was studied.

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“…Preparation of nanometer SiO 2 . The various SiO 2 nanoparticles were prepared through a sol-gel process by using novolac as a template agent [5,6,7].…”

Section: Advanced Materials Researchmentioning

confidence: 99%

“…Our previous studies have reported the thermal stability and dynamic mechanical behavior of nano-SiO 2 /PF nanocomposites [5]. Moreover, it has been found that the nano-SiO 2 can significantly improve the thermal stability and dynamic mechanical properties of nanocomposites.…”

Section: Introductionmentioning

confidence: 97%

Mechanical and Tribological Properties of Phenol Formaldehyde Resin Reinforced with Nano-Silica

Wei

2011

AMR

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“…The irradiated fibers lose their solubility in DMF. The influence of the dose (100–250 kGy) on the degree of cyclization for this precursor was studied in more detail in [ 168 ]. As the dose increases to 150 kGy, the degree of cyclization increases to 0.27 and then reaches a plateau.…”

Section: How To Conduct Stabilization Of the Fiber Without Its Meltin...mentioning

confidence: 99%

Melt-Spinnable Polyacrylonitrile—An Alternative Carbon Fiber Precursor

et al. 2022

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The review summarizes recent advances in the production of carbon fiber precursors based on melt-spun acrylonitrile copolymers. Approaches to decrease the melting point of polyacrylonitrile and acrylonitrile copolymers are analyzed, including copolymerization with inert comonomers, plasticization by various solvents and additives, among them the eco-friendly ways to use the carbon dioxide and ionic liquids. The methods for preliminary modification of precursors that provides the thermal oxidative stabilization of the fibers without their melting and the reduction in the stabilization duration without the loss of the mechanical characteristics of the fibers are discussed. Special attention is paid to different ways of crosslinking by irradiation with different sources. Examples of the carbon fibers preparation from melt-processable acrylonitrile copolymers are considered in detail. A patent search was carried out and the information on the methods for producing carbon fibers from precursors based on melt-spun acrylonitrile copolymers are summarized.

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“…As early as 1995, Hirt and co-workers had successfully applied e-beam irradiation on PAN fibers to reduce the stabilization time, and they revealed that the e-beam can initiate radical-induced cyclization of PAN polymer chains [9]. Since then, many efforts have been devoted to study the effect of e-beam irradiation on the stabilization behavior of PAN fibers [2,15,16,17,18,19]. However, successful preparation of carbon fibers based on e-beam irradiation pretreatment is rarely reported, and the application of e-beam irradiation to industrial production of carbon fibers is delayed.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Continuous Preparation of Polyacrylonitrile-Based Carbon Fibers with Electron-Beam Irradiation Pretreatment

Yang

Liu

et al. 2018

Materials

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Thermal stabilization is a critical, yet time- and energy-consuming process during the preparation of PAN-based carbon fibers. In this work, automobile-grade carbon fibers with a 2.85 GPa tensile strength and a 203 GPa modulus are continuously produced with electron-beam (e-beam) irradiation pretreatment and 24 min thermal stabilization. Thermal and structural analyses reveal that e-beam irradiation can lower the onset temperature of the cyclization reaction and mitigate the heat release. Meanwhile, during the process of stabilization, e-beam irradiation can facilitate the evolution of both the chemical structure and the crystalline structure of polyacrylonitrile (PAN) fibers. Comparing to the industrial production of carbon fiber with a 40 min stabilization time, e-beam irradiated PAN fibers can achieve the same degree of stabilization with a 40% time savings.

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The Characterization of Different Doses of Electron Beam Irradiation on the Structure and Properties of PAN Precursor Fibers

Cited by 3 publications

References 7 publications

Mechanical and Tribological Properties of Phenol Formaldehyde Resin Reinforced with Nano-Silica

Mechanical and Tribological Properties of Phenol Formaldehyde Resin Reinforced with Nano-Silica

Melt-Spinnable Polyacrylonitrile—An Alternative Carbon Fiber Precursor

Rapid and Continuous Preparation of Polyacrylonitrile-Based Carbon Fibers with Electron-Beam Irradiation Pretreatment

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