Preparation and characterization of the electrospun PCS/TiO2 fiber mat by electron beam irradiation

Seo, Dongkwon; Jeun, Joon‐Pyo; Kang, Phil‐Hyun

doi:10.1016/j.jiec.2011.05.003

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…26,27 These carbon nanofiber mats are produced by electrospinning of suitable polymers to produce the corresponding polymer nanofiber mat, followed by carbonization. 28 Modifications in the carbon nanofiber mat by incorporating various additives are reported to improve their EMI shielding effectiveness. 29 However, the poor mechanical strength of these fragile mats makes their practical applications doubtful.…”

Section: Introductionmentioning

confidence: 99%

“…Recent research is focusing on achieving high EMI shielding effectiveness at a low thickness of the shielding material . A large number of studies are being reported in this direction using carbon nanofiber mats. , These carbon nanofiber mats are produced by electrospinning of suitable polymers to produce the corresponding polymer nanofiber mat, followed by carbonization . Modifications in the carbon nanofiber mat by incorporating various additives are reported to improve their EMI shielding effectiveness .…”

Section: Introductionmentioning

confidence: 99%

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Upcycling of Used Cotton Cloth to Robust Fire-Resistant Carbon Composite Grids with Excellent EMI Shielding

Saraswathy,

M R,

Prabhakaran

2024

ACS Appl. Eng. Mater.

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The castoff cotton cloth is used for the preparation of robust carbon composite grids (CCGs) by bonding the warp and fill yarns at their contact point by successive impregnation with a solution of sucrose and phenol formaldehyde (PF) followed by curing and carbonization at 900 °C. The CCGs are characterized by X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectra (XPS), and scanning electron microscopy (SEM) analysis. The width, thickness, empty grid size, and density of the CCGs are modulated in the ranges of 0.354−0.388, 0.587−0.657, 0.357−0.299 mm, and 0.24−0.55 g•cm −3 , respectively, by the PF solution concentrations in the range of 30−80 vol %. The tensile strength and modulus increase from 0.42 to 2.73 and 18.8 to 111 MPa, respectively, when the PF solution concentration increases from 30 to 80 vol %. The CCGs are fire-resistant and exhibit reflection-dominated EMI shielding. The absorption contribution and total EMI shielding effectiveness increase from 30.1 to 46.9 and 34.8 to 52.4 dB, respectively, when the PF solution concentration increases from 30 to 70 vol %. The multiple internal reflections within the empty grid space, interfiber porosity, and lumen of the carbonized cotton fiber led to attenuation of electromagnetic (EM) waves by both conductive losses due to mobile electrons and dielectric losses due to polarization at the functional groups and the large area of carbon−carbon and carbon−air interfaces. The thin, robust, and large-area CCGs produced can be a candidate for high-performance electromagnetic interference (EMI)-shielding material with excellent fire resistance for the strategic sector.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Upcycling of Used Cotton Cloth to Robust Fire-Resistant Carbon Composite Grids with Excellent EMI Shielding

Saraswathy,

M R,

Prabhakaran

2024

ACS Appl. Eng. Mater.

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“…Lignin is a complex aromatic macromolecule in the cell wall of plants and it is the most abundant non-cellulosic polymer on earth. Pure lignin solution could not be electrospun into nanofibers at any concentration because lignin has relatively low viscoelasticity in solution and hence yields nonuniform fibers [18,19].Thus, it is commonly blended with another polymer such as polyethylene oxide (PEO) [20][21][22], poly(vinyl alcohol) (PVA) [23], or polyacrylonitrile (PAN) [24][25][26][27]. Lignin has been used by electrospinning to produce fibers [20,22,23].…”

Section: Introductionmentioning

confidence: 99%

Influence of Lignin Concentration on Polyacrylonitrile Nanofibers for Lead Removal

Jungcharoen

Kim

2022

MSF

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Water contamination by heavy metals is one of the most serious environmental problems and harms human life. Numerous nanotechnologies have been utilized to overcome this problem so far. Herein, we introduce lignin/polyacrylonitrile (PAN) composite nanofibers prepared via electrospinning for the removal of lead from aqueous solution. The effects of blend ratios between lignin and PAN concentration (LP) were investigated. The performance of adsorption process depends on the following parameters including contact time of adsorbent and adsorbate (equilibrium times: after 16 h. for 10 mg/L of lead concentration), types of nanofibers (LP55 at 1 g/L), and the percentage of lead removal was 72.5 % within 24 hours by LP55 nanofibers. The highest correlation coefficients were performed for the pseudo-second order kinetic model both LP55 and PAN nanofibers. This study demonstrates that the potential of the biomass-derived material with nanotechnology for environmental remediation.

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“…Another study involved electrospun and carbonized PAN:Lignin polymer blends with electron beam-induced crosslinking followed by carbonization. The authors concluded that crosslinked fibers were more thermodynamically stable resulting in higher char yield compared to the non-crosslinked ones [23]. PAN:Lignin blends using different types of lignin were cast into films and characterized as potential carbon fiber precursors [24].…”

Section: Introductionmentioning

confidence: 99%

Binder free carbon nanofiber electrodes derived from polyacrylonitrile-lignin blends for high performance supercapacitors

2019

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Lignin was blended with polyacrylonitrile (PAN) in different ratios and fabricated into carbon nanofiber electrodes by electrospinning followed by thermal stabilization, carbonization and subsequent activation by CO2 of the carbonized mats. These carbon fiber electrodes exhibit high surface area, high mesoporosity, high graphitic content and high electrical conductivity. Activated carbon nanofiber mats derived from PAN:Lignin 70:30 blends display a surface area of 2370 m2 g−1 with 0.635 cm3 g−1 mesopore volume. These results are due to the selective partial removal of carbonized lignin during the activation step. Coin cell supercapacitors employing these electrodes exhibit 128 Fg−1 specific capacitance, 59 Wh kg−1 energy density and a 15 kW kg−1 power density when operated at 3.5 V using an ionic liquid electrolyte. Since lignin is an inexpensive, abundant, and green polymer, incorporating it into carbon blends enhances the scalability of such materials in energy storage applications.

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Preparation and characterization of the electrospun PCS/TiO2 fiber mat by electron beam irradiation

Cited by 5 publications

References 24 publications

Upcycling of Used Cotton Cloth to Robust Fire-Resistant Carbon Composite Grids with Excellent EMI Shielding

Upcycling of Used Cotton Cloth to Robust Fire-Resistant Carbon Composite Grids with Excellent EMI Shielding

Influence of Lignin Concentration on Polyacrylonitrile Nanofibers for Lead Removal

Binder free carbon nanofiber electrodes derived from polyacrylonitrile-lignin blends for high performance supercapacitors

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