Characteristic assessment of stabilized polyacrylonitrile nanowebs for the production of activated carbon nano-sorbents

Rafiei, Saeedeh; Noroozi, Babak; Arbab, Sh; Haghi, A. K.

doi:10.1007/s10118-014-1410-4

Cited by 15 publications

(7 citation statements)

References 29 publications

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“…Both aforementioned papers do not take into account the influence of the heating rate. Different heating rates between 1 C/min and 4 C/min in combination with different end temperatures between 180 C and 270 C were investigated by Rafiei et al who also prepared PAN nanofiber mats by needle electrospinning from DMF [14]. They found heating rates above 2 C/min resulting in brittle products and defined 270 C as the ideal end temperature with a dwell time of 1-2 h. Here, no undesired fiber conglutinations are visible for an end temperature of 270 C, approached with a heating rate of 1 C/min.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of polyacrylonitrile nanofiber mats obtained by needleless electrospinning using dimethyl sulfoxide as solvent

Sabantina

Klöcker

Wortmann

et al. 2019

Journal of Industrial Textiles

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Polyacrylonitrile can be used as a base material for thermochemical conversion into carbon. Especially nanofiber mats, produced by electrospinning, are of interest to create carbon nanofibers. Optimal stabilization and carbonization parameters, however, strongly depend on the spatial features of the original material. While differences between nano- and microfibers are well known, this paper shows that depending on the electrospinning method and the solvent used, considerable differences between various nanofiber mats have to be taken into account for the optimization of the stabilization conditions. Here, we examine for the first time polyacrylonitrile nanofiber mats, electrospun with wire electrospinning from the low-toxic dimethyl sulfoxide as a solvent, instead of the typically used needle electrospinning from the toxic dimethylformamide. Additionally, we used inexpensive polyacrylonitrile from knitting yarn instead of highly specialized material, tailored for carbonization. Our results show that by carefully controlling the maximum stabilization temperature and especially the heating rate, fully stabilized polyacrylonitrile fibers without undesired interconnections can be created as precursors for carbonization.

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Section: Introductionmentioning

confidence: 99%

Stabilization of polyacrylonitrile nanofiber mats obtained by needleless electrospinning using dimethyl sulfoxide as solvent

Sabantina

Klöcker

Wortmann

et al. 2019

Journal of Industrial Textiles

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“…Gu et al examined the conductivity of carbon nanofibers, stabilized at different temperatures, and found that while the morphology of the carbon nanofibers was desirable for a stabilization temperature of 250 °C, a stabilization temperature of 270 °C resulted in fiber conglutinations which were supportive for an increased conductivity [16]. Rafiei et al found stabilization temperatures of 150–270 °C in combination with a heating rate below 2 °C/min ideal according to the stabilization index and the aromatization index [17].…”

Section: Introductionmentioning

confidence: 99%

Fixing PAN Nanofiber Mats during Stabilization for Carbonization and Creating Novel Metal/Carbon Composites

et al. 2018

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Polyacrylonitrile (PAN) is one of the materials most often used for carbonization. PAN nanofiber mats, created by electrospinning, are an especially interesting source to gain carbon nanofibers. A well-known problem in this process is fixing the PAN nanofiber mats during the stabilization process which is necessary to avoid contraction of the fibers, correlated with an undesired increase in the diameter and undesired bending. Fixing this issue typically results in breaks in the nanofiber mats if the tension is too high, or it is not strong enough to keep the fibers as straight as in the original state. This article suggests a novel method to overcome this problem by electrospinning on an aluminum substrate on which the nanofiber mat adheres rigidly, stabilizing the composite and carbonizing afterwards either with or without the aluminum substrate to gain either a pure carbon nanofiber mat or a metal/carbon composite.

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“…Activated carbon nanofiber nonwoven (ACNFN) is a form of activated carbon that is attracting increasing attention as a sorbent due to its highly accessible specific surface area combined with its nonwoven form factor [26]. ACNFNs can be fabricated through the pyrolysis of electrospun nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon nanofiber nonwoven for removal of emulsified oil from water

Waisi

Arena

Benes

et al. 2020

Microporous and Mesoporous Materials

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Characteristic assessment of stabilized polyacrylonitrile nanowebs for the production of activated carbon nano-sorbents

Cited by 15 publications

References 29 publications

Stabilization of polyacrylonitrile nanofiber mats obtained by needleless electrospinning using dimethyl sulfoxide as solvent

Stabilization of polyacrylonitrile nanofiber mats obtained by needleless electrospinning using dimethyl sulfoxide as solvent

Fixing PAN Nanofiber Mats during Stabilization for Carbonization and Creating Novel Metal/Carbon Composites

Activated carbon nanofiber nonwoven for removal of emulsified oil from water

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