Preparation of Polyacrylonitrile Nanofibers with Controlled Morphology Using a Constant-Current Electrospinning System for Filter Applications

Munir, Muhammad Miftahul; Nuryantini, Ade Yeti; Khairurrijal, Khairurrijal; Abdullah, Mıkrajuddın; Iskandar, Ferry; Okuyama, Kikuo

doi:10.4028/www.scientific.net/msf.737.159

Cited by 15 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several methods have been utilized to make nanofibers, some which are: solution blowing [32], supercritical fluid [33], electrospinning [34,35], and forcespinning (FS) [36]. Among these methods, the development of FS technology has received a lot of attention recently.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Forcespun Amidoximated Polyacrylonitrile-graphene Oxide Nanofibers and Evaluation of Their Uranium Uptake from Aqueous Media

Ashrafi

Firouzzare

2021

Fibers Polym

View full text Add to dashboard Cite

In this study, a handmade forcespinning device was developed to prepare polyacrylonitrile (PAN) and polyacrylonitrile-graphene oxide (PAN-GO) nanofibers. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to investigate the morphology and characterization of the nanofibers. Modified PAN-GO (0.2 %) nanofibers were obtained by reducing nitrile groups to amidoxime and then applied to uptake uranium ions from aqueous media. The maximum adsorption obtained for the adsorbent was 345.084 mg g -1 , which was obtained under optimal conditions of pH=5, contact time of 90 minutes and initial concentration of 25 mg L -1 . Also, the adsorption data were evaluated using Langmuir, Freundlich, Dubin and S-shaped isotherms. The results introduced the S-shaped isotherm model with a regression coefficient (R 2 ) of 0.999 as a suitable model. In addition, kinetic studies represented that uranium adsorption for less than 45 min fits well with the pseudo-second-order model (R 2 =0.979). At times longer than 45 min, the nanofibers follow the S-shaped kinetics (R 2 =0.999). Eventually, negative ΔG (Gibbs free energy change) represents spontaneous adsorption of uranium ions by PAN-GO (0.2 %) . The selectivity of PAN-GO nanofibers for the adsorption of competing ions was in accordance with the order Fe(II) < Ni(II) < CO(II) < U(VI) < V(V).

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation of Forcespun Amidoximated Polyacrylonitrile-graphene Oxide Nanofibers and Evaluation of Their Uranium Uptake from Aqueous Media

Ashrafi

Firouzzare

2021

Fibers Polym

View full text Add to dashboard Cite

show abstract

“…Polyacrylonitrile (PAN) is a commodity polymer prepared mainly by the radical polymerization of acrylonitrile (AN) and has various applications, such as in films, coatings, and fabrics. [5][6][7][8][9][10] PAN is also used as a precursor for fabricating high-quality carbon fibers, which are used for lightweight and high-strength structural materials such as body frames of airplanes and cars, and the properties of the fibers are influenced by the structure of the PAN. 11 Despite the practical importance of PAN, the termination mechanism in AN polymerization is still unclear to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Evidence for Polarity- and Viscosity-Controlled Domains in the Termination Reaction in the Radical Polymerization of Acrylonitrile

Lin¹,

Ogihara²,

Kato³

et al. 2021

Preprint

View full text Add to dashboard Cite

The termination mechanism in the radical polymerization of acrylonitrile (AN) was determined by the reaction of structurally well-defined polyacryronitrile (PAN) chain-end radical 1a and PAN-end mimetic small model radical 1b. The contributions of three mechanisms, i.e., the disproportionation (Disp), the combination by carbon-carbon formation (CC-Comb), and the combination by carbon-nitrogen bond formation (CN-Comb), were unambiguously determined. The CN-Comb pathway was experimentally proved for the first time. The selectivity between Disp and CC-Comb showed a good correlation with the viscosity and temperature, and the Disp selectivity increased as the viscosity increased, as previously reported for the termination of other monomers. In contrast, CN-Comb is insensitive to viscosity but sensitive to polarity; the selectivity decreases as the polarity of the media increases. The results strongly suggest the presence of two domains in the termination reaction, namely, the polarity- and viscosity-controlled domains. CN-Comb product 5 was stable under the polymerization conditions but decomposed to Disp and CC-Comb products at high temperatures. Therefore, care must be taken in the processing step, such as the molding process, because the physical properties could be altered due to changes in the Disp and CC-Comb compositions.

show abstract

“…Polymer nanofibers are receiving significant attention due to their exceptional properties such as high specific surface area, low density, good ductility, [ 1 ] and their great potential for applications in membrane materials, [ 2 ] filter materials, [ 3 ] and adsorption materials. [ 4 ]…”

Section: Introductionmentioning

confidence: 99%

The mechanism of the controlled deposition of electrospun fibers

Gao

Wang

et al. 2020

Polymer Engineering & Sci

View full text Add to dashboard Cite

The controlled deposition of electrospun fibers means that the electrospun fibers can be collected in a limited and specified area and can present better applications in the fields of medical treatment, garment making, and 3D printing. In order to study the mechanism of the controlled deposition of electrospun fibers, simulation and experimental methods were used. Specifically, in the electrospinning experiment, circular copper sheets of different diameters were used as collectors. The effect of different collector areas on the morphology of fiber deposition was discussed. The electric field distribution of electrospinning with different specifications of collectors was simulated correspondingly. The experimental results show that, as compared to the traditional large flat collector, the area where the electrospun fibers are deposited is significantly reduced when a smaller circular copper plate was used as a collector. The smaller the area of the collector, the more the fibers tend to deposit at the center area of the collector, and the more likely the morphology of the product formed by the fiber deposition to exhibit a center protrusion shape. The controlled deposition of the electrospun fiber technology can provide more opportunities for the application of the electrospinning technology.

show abstract

Preparation of Polyacrylonitrile Nanofibers with Controlled Morphology Using a Constant-Current Electrospinning System for Filter Applications

Cited by 15 publications

References 25 publications

Preparation of Forcespun Amidoximated Polyacrylonitrile-graphene Oxide Nanofibers and Evaluation of Their Uranium Uptake from Aqueous Media

Preparation of Forcespun Amidoximated Polyacrylonitrile-graphene Oxide Nanofibers and Evaluation of Their Uranium Uptake from Aqueous Media

Evidence for Polarity- and Viscosity-Controlled Domains in the Termination Reaction in the Radical Polymerization of Acrylonitrile

The mechanism of the controlled deposition of electrospun fibers

Contact Info

Product

Resources

About