Influence of γ‐ray irradiation on structure and properties of PAN precursor fibers

Liu, Shuping; Liu, Rangtong; Han, Keqing; Hua, Liang; Yu, Miao

doi:10.1002/pen.24372

Cited by 6 publications

(4 citation statements)

References 23 publications

(20 reference statements)

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“…The interest in the production of carbon fibers has remained active because of their attractive electrical and thermo‐physical properties and therefore, a myriad of potential applications . Carbon fibers can exhibit relatively high electrical conductivity, high mechanical strength, high thermal stability, and are known to be lightweight compared to other structures .…”

Section: Introductionmentioning

confidence: 99%

High‐Throughput Production With Improved Functionality and Graphitization of Carbon Fine Fibers Developed from Sodium Chloride‐Polyacrylonitrile Precursors

Akia

Cremar

Seas

et al. 2018

Polymer Engineering & Sci

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Fine polyacrylonitrile (PAN) fibers were produced through a scalable centrifugal spinning process. Sodium chloride (NaCl) was added to the PAN‐dimethylformamide solution to decrease the surface tension and consequently promote a decrease in fiber diameter while increasing the fiber output. The fiber preparation process involved the centrifugal spinning of the PAN‐based solution; developed fibers were stabilized in air at 240°C followed by carbonization at 800°C under a Nitrogen atmosphere. The addition of sodium chloride to the PAN solution led to a 37% decrease in the carbon fiber diameter. The carbon fibers were analyzed by scanning electron microcopy, transmission electron microscopy (TEM), X‐ray diffraction, X‐ray photoelectron spectroscopy (XPS) and electrochemical experiments. The TEM results revealed improved graphitization with the addition of sodium chloride. The XPS analysis showed increased functionality (e.g. O2) on the surface of carbon fibers obtained from PAN/NaCl precursor fibers. A significant improvement was achieved in the electrochemical performance of carbon fibers made from PAN/NaCl precursor fibers compared to those made from pure PAN precursor fibers. POLYM. ENG. SCI., 58:2047–2054, 2018. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

High‐Throughput Production With Improved Functionality and Graphitization of Carbon Fine Fibers Developed from Sodium Chloride‐Polyacrylonitrile Precursors

Akia

Cremar

Seas

et al. 2018

Polymer Engineering & Sci

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“…Gamma-ray irradiation can induce carbon-carbon crosslinking and oxygen-containing crosslinking, enlarge the fiber microcrystalline size, and enhance the graphitization of carbon fibers to some extent. Therefore, gamma-ray irradiation can improve the mechanical properties of fibers by adjusting the internal structure of carbon fibers at a certain dosage [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of carbon fibers: γ-irradiation induced microporous modulation and surface defect repairing with graphene quantum dots

Shao,

Zhou,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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Due to the presence of numerous defects both internally and on the surface, carbon fiber exhibits mechanical properties far below theoretical predictions. Finding a rapid and effective method for reinforcing the matrix remains a challenge. To address this, we have conducted structural reinforcement of carbon fiber by improving the orientation of internal micropores and eliminating surface defects. On the one hand, we subjected the carbon fiber to a dose of 100 kGy of gamma-ray irradiation in the air. After testing, the mechanical properties of the carbon fiber improved by 5.59 %. Analysis using techniques such as Small-angle X-ray scattering (SAXS) revealed that gamma rays can slightly alter the orientation of the fiber’s internal micropores and enhance graphitization to some extent. On the other hand, we introduced graphene quantum dots (GQDs) onto the surface of the carbon fiber using electrostatic spraying and electrophoretic deposition techniques to fill the defect sites. Compared to untreated carbon fiber, the mechanical properties improved by 10.65 % and 9.40 % when GQDs were grafted using electrophoretic deposition and electrostatic spraying methods, respectively. This improvement can be attributed to the adsorption of GQDs on the surface of the carbon fiber, which disperses stress during tensile loading and delays fracture. Finally, grafting of GQDs onto the surface of gamma-irradiated carbon fibers by electrophoresis improved the mechanical properties of the carbon fibers by 15.53% compared to unmodified carbon fibers. This work provides a more comprehensive perspective for repairing carbon fiber structures.

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“…In addition, the radiation-induced crosslinking reaction can also be applied for the modification of PAN to adjust its thermal properties by low energy glow discharge ion beam and UV and gamma radiation [10,11].…”

Section: Introductionmentioning

confidence: 99%

Study of Electron Beam Pre-Irradiation on Char Yields of Polyacrylonitrile

Xiao

Miao²

2020

MSF

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Thermal treatment of polyacrylonitrile (PAN) with different molecular weights pre-irradiated by electron beam was prepared to study the radiation effects on thermal behaviors. Thermal properties were characterized by thermogravimetric analyses. Char yields (800 oC) of PAN samples are increased remarkably with the increase of irradiation dose, and all samples can obtain the similar high char yields (~57 %) at the dose of 300 kGy. FTIR and UV-visible absorption spectra of pre-irradiation PAN illustrate the formation of –HC=N-N=CH-crosslinking conjugation across the polymeric chains, which can improve PAN’s thermal behaviors. Char yields of pre-irradiated PAN samples are mainly dominated by their gel contents, and they are almost independent of the molecular weights of PAN samples.

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Influence of γ‐ray irradiation on structure and properties of PAN precursor fibers

Cited by 6 publications

References 23 publications

High‐Throughput Production With Improved Functionality and Graphitization of Carbon Fine Fibers Developed from Sodium Chloride‐Polyacrylonitrile Precursors

High‐Throughput Production With Improved Functionality and Graphitization of Carbon Fine Fibers Developed from Sodium Chloride‐Polyacrylonitrile Precursors

Reinforcement of carbon fibers: γ-irradiation induced microporous modulation and surface defect repairing with graphene quantum dots

Study of Electron Beam Pre-Irradiation on Char Yields of Polyacrylonitrile

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