Drawing dependent structures, mechanical properties and cyclization behaviors of polyacrylonitrile and polyacrylonitrile/carbon nanotube composite fibers prepared by plasticized spinning

Li, Xiang; Qin, Aiwen; Zhao, Xinzhen; Liu, Dapeng; Wang, Haiye; He, Chunju

doi:10.1039/c5cp02498f

Cited by 16 publications

(14 citation statements)

References 46 publications

(71 reference statements)

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“…For the FTIR spectra of the PAN bers, the peaks in the range of 2180-2260 cm À1 can be ascribed to three types of C^N groups: un-reacted nitrile at 2242 cm À1 , conjugated nitrile at 2210 cm À1 and b-amino nitrile at 2190 cm À1 . 28,29 As shown in Table 3 and Fig. 2, B 3 shows a higher F c than D 3.…”

Section: Ftir Analysismentioning

confidence: 69%

Evolution of the morphological and structural properties of plasticized spinning polyacrylonitrile fibers during the stabilization process

2015

RSC Adv.

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Section: Ftir Analysismentioning

confidence: 69%

Evolution of the morphological and structural properties of plasticized spinning polyacrylonitrile fibers during the stabilization process

2015

RSC Adv.

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“…In addition to organic materials, inorganic materials such as carbon nanotubes (CNTs) and functionalized CNTs have been mixed with the PAN precursor. [7,21,22] CNTs enhance the mechanical properties of the carbon fiber. Since PAN is already a one-dimensional crystallized material consisting of carbon atoms, it can easily stack upon the CNTs to form a graphitic structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Various Transition Metals on the Thermal Oxidative Stabilization of Polyacrylonitrile Nanofibers

Lee

Yoo

et al. 2021

J Inorg Organomet Polym

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In this paper, the polyacrylonitrile (PAN) nanofibers and PAN nanofibers bonded with different transition metal (Fe, Co, Ni, and Cu) acetates were successfully prepared and their thermal oxidative stabilization process were analysed by Fourier-transform infrared spectra (FT-IR) and differential scanning calorimetry (DSC). The structural evolution of process was characterized by examining the FTIR spectral peaks generated at four different thermal oxidative stabilization temperatures. Based on the thermal oxidative stabilization rates obtained from each transition metal, Co-PAN and Cu-PAN are the only effective precursors for the thermal oxidative stabilization process and, according to differential scanning calorimetry, Co-PAN is the most effective and suitable precursor for the PAN with different transition metals. Although Co-PAN increased the exothermic reaction (ΔH) by approximately 140%, it alleviates the heat release rate (ΔH/ΔT) by approximately 44%.

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“…Among various types of polymer-CNT nanocomposite fiber, polyacrylonitrile (PAN) has been among the most studied polymeric system 10 – 12 . Li et al 3 studied the effect of drawing on the mechanical properties of the PAN/multi-wall carbon nanotube (MWNT) composite fiber. Chae et al investigated enhancing PAN-CNT composites by gel-spinning 4 , 5 and CNT-exfoliation 6 processes, and Wang et al 7 showed that the mechanical properties of PAN-CNT nanocomposites were enhanced by the orientation of nanocomposite CNTs during deformation.…”

Section: Introductionmentioning

confidence: 99%

“…PAN polymer is a well-known precursor for carbon fiber, and recent studies have shown that even nanometer-scale defects can be of critical failure site 21 . A number of studies [2][3][4][5][6][7] on PAN/CNT composite fibers have been conducted for the last two decades to improve carbon fiber properties further. Therefore, it is essential to understand the role of CNT for the defect structure development in the precursor fiber processing stage.…”

mentioning

confidence: 99%

Defect structure evolution of polyacrylonitrile and single wall carbon nanotube nanocomposites: a molecular dynamics simulation approach

Heo

Kim

Han

et al. 2020

Sci Rep

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In this study, molecular dynamics simulations were performed to understand the defect structure development of polyacrylonitrile-single wall carbon nanotube (pAn-SWnt) nanocomposites. three different models (control PAN, PAN-SWNT(5,5), and PAN-SWNT(10,10)) with a SWNT concentration of 5 wt% for the nanocomposites were tested to study under large extensional deformation to the strain of 100% to study the corresponding mechanical properties. Upon deformation, the higher stress was observed in both nanocomposite systems as compared to the control PAN, indicating effective reinforcement. The higher Young's (4.76 ± 0.24 GPa) and bulk (4.19 ± 0.25 GPa) moduli were observed when the smaller-diameter SWnt (5,5) was used, suggesting that SWNT (5,5) resists stress better. the void structure formation was clearly observed in pAn-SWnt (10,10) , while the nanocomposite with smaller diameter SWnt (5,5) did not show the development of such a defect structure. In addition, the voids at the end of SWnt (10,10) became larger in the drawing direction with increasing deformation. Carbon nanotube (CNT)-based polymer nanocomposites have been extensively studied for more than 20 years 1. A number of researches on CNT-based polymer nanocomposites have shown the promising potential of CNTs as a reinforcing material and as a source of multiple functionalities owing to the strong interaction with polymer matrices 2-9. Bhattacharyya et al. 2 investigated the enhanced interfacial adhesion between the polyamide12matrix and styrene-maleic-anhydride copolymer encapsulated (SMA-encapsulated) single-wall carbon nanotubes (SWNTs), showing that tensile and dynamic mechanical properties of the composites were improved. In addition to the bulk composites, CNT-based polymer nanocomposites have often been processed into fibers because the fibrous shape is the best way to fully exploit the anisotropic structure of CNTs and polymers. Among various types of polymer-CNT nanocomposite fiber, polyacrylonitrile (PAN) has been among the most studied polymeric system 10-12. Li et al. 3 studied the effect of drawing on the mechanical properties of the PAN/multiwall carbon nanotube (MWNT) composite fiber. Chae et al. investigated enhancing PAN-CNT composites by gel-spinning 4,5 and CNT-exfoliation 6 processes, and Wang et al. 7 showed that the mechanical properties of PAN-CNT nanocomposites were enhanced by the orientation of nanocomposite CNTs during deformation. Since the atomistic level of simulations such as molecular dynamics (MD) can provide detailed information of the nanocomposites in molecular level, a few studies regarding on PAN-CNT nanocomposites was also conducted using MD simulations 13,14. Meng et al. 13 investigated the effect of nanotube dispersion and polymer conformational confinement on interaction PAN-SWNT interaction energies using full atomistic molecular dynamics (MD) computational simulations with experiments. Gissinger et al. 14 have investigated structure-property relationships

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Drawing dependent structures, mechanical properties and cyclization behaviors of polyacrylonitrile and polyacrylonitrile/carbon nanotube composite fibers prepared by plasticized spinning

Cited by 16 publications

References 46 publications

Evolution of the morphological and structural properties of plasticized spinning polyacrylonitrile fibers during the stabilization process

Evolution of the morphological and structural properties of plasticized spinning polyacrylonitrile fibers during the stabilization process

Effects of Various Transition Metals on the Thermal Oxidative Stabilization of Polyacrylonitrile Nanofibers

Defect structure evolution of polyacrylonitrile and single wall carbon nanotube nanocomposites: a molecular dynamics simulation approach

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