The Synthesis of Boron Carbide Ceramic via Electrospinning Technique

Uslu, İbrahım; Tunç, Tuncay

doi:10.1007/s10904-011-9600-9

Cited by 11 publications

(10 citation statements)

References 26 publications

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“…The absorption bands presented at 100°C are assigned to: 3700-3100 cm −1 (νsH-OH, νsC-OH, νsB-OH, hydrogen bonds), 2940-2870 cm −1 (νsC-H of CH2, CH3), 2300-1900 cm −1 (δ hydrogen bonds), 1720-1710 cm −1 (νsC=O), 1650-1640 cm −1 (O-H of H2O, C-C), 1460-1425 cm −1 (νasO-H, δC-H of CH2 and C-C), 1370-1350 cm −1 (δasCH3 and C-C), 1370-1220 cm −1 (δC-OH, νO-C-C), 1120-1080 cm −1 (νC-OH of secondary alcohol PVA, Glycerol), 1065-1020 cm −1 (νC-OH of primary alcohol PEG, Glycerol), 1100-1000 cm −1 (δC-O-C of esters), 1200-970 cm −1 (δC-O), 940-920 cm −1 (γC-OH and δC-C), 700-670 cm −1 (δC-H and C-C) [16][17][18][19][20][21]27,28] . The bands in region 1500-1200 cm −1 are allied to (νB-O of BO3), 1200-850 cm −1 to (νB-O of BO4) and 800-600 cm −1 (bending vibrations for various borate segments) [29,30] .…”

Section: Ftir Spectramentioning

confidence: 99%

“…The bands in region 1500-1200 cm −1 are allied to (νB-O of BO3), 1200-850 cm −1 to (νB-O of BO4) and 800-600 cm −1 (bending vibrations for various borate segments) [29,30] . The characteristic frequency for B-O-C bond occurred at 1030 cm −1 [16][17][18][19] .…”

Section: Ftir Spectramentioning

confidence: 99%

“…1 and 2 are connected to the simultaneous disappearance of the absorptions bands in the regions of 2940-2870 cm −1 and 1720 cm −1 . The presence of new bands at 700 cm −1 , 460 cm −1 , 550 cm −1 indicates the presence of BO3 groups [16,19,29,30] . The network of the PVA-H3BO3 hybrid precursor at 400°C is destroyed, and typical bands of BO3 group in boric acid are observed in Fig.…”

Section: Ftir Spectramentioning

confidence: 99%

“…As a result, carbon active sites are blocked because boron generates an oxygen diffusion barrier on the surface of the materials, preventing oxygen from reaching the carbon surface [12][13][14][15] . Ceramic fiber [16] , boron carbide [17][18][19][20] and boron nitride ceramics [21] are produced using only PVA-B2O3 hybrid precursors. For borate glasses, data exist only for the cases of metal counterions for anions borate units' compensation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Boron Oxide Glasses and Nanocomposites: Synthetic, Structural and Statistical Approach

Hristov

Nedyalkova

Madurga

et al. 2017

Journal of Materials Science & Technology

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Organic-inorganic hybrid materials Borate glass Nanocomposites Cluster analysisThree different precursors of boron-aqua and glycerol solutions of boric acid and ethanol solution of trimethyl borate were used for the preparation of organic-inorganic advanced materials. The films and bulk materials samples were heat treated at 100, 400, 800°C for 2 h. The hybrid samples were stable and transparent until 100°C. The further increase of temperature to 400°C led to destruction of samples, and at 800°C they were molten. The structural changes during the pyrolysis were studied by Fourier transform infrared spectroscopy, differential thermal analysis, and X-ray diffraction. Details of surface morphology were observed by scanning electron microscopy. The obtained BO3 and BO4 groups were identified in the molten materials after pyrolysis. The quantities and order of borate structural units as well as residual carbon in the networks depended on boron precursor type. PVA/PEG/B2O3 hybrid materials were proved to be appropriate precursors for synthesizing borate and carboborate glass and carbon/borate glass nanocomposites. To access the impact of the experimental conditions on the structural changes of the nanocomposites, cluster analysis of the IR-spectral data was used as a classification method.

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Section: Ftir Spectramentioning

confidence: 99%

Section: Ftir Spectramentioning

confidence: 99%

Section: Ftir Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Boron Oxide Glasses and Nanocomposites: Synthetic, Structural and Statistical Approach

Hristov

Nedyalkova

Madurga

et al. 2017

Journal of Materials Science & Technology

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“…To alter the viscosity and improve the spinning ability of the solution, glycerol as a solvent and PVA as a polymeric content are added. [44][45][46] The overall neutron absorption cross-section is known to affect neutron shielding performance. Previous research has found that a larger total neutron cross-section leads to improved radiation shielding.…”

Section: Introductionmentioning

confidence: 99%

Boron carbide reinforced electrospun nanocomposite fiber mats for radiation shielding

et al. 2023

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In this study, 1 wt% boron carbide (B4C) reinforced PVA nanofibers were fabricated by the electrospinning technique as a new generation of ultra‐thin, lightweight, and flexible neutron shielding nanocomposites. The influence of B4C particles' size and morphology on the fiber formation and radiation shielding performance of fiber mats was investigated. The results indicate that the particle characteristics have a dramatic influence on the formation and properties of nanocomposites. The thicknesses of individual fibers reinforced with sol–gel synthesized nano‐sized boron carbide particles were in the range of 50–250 nm, while those containing commercial B4C powder were produced in the thickness range of 1–2 μm. In contrast to the commercial particles, the sol–gel synthesized nano B4C particles enhanced the fiber mat's density and the roundness of individual fibers. Both theoretical and experimental radiation shielding studies showed that B4C reinforcement successfully improved the neutron and gamma attenuation of the neat PVA matrix. Furthermore, it was found that a 6.5 mm thick PVA nanofiber mat, reinforced with only 1 wt% B4C nanoparticles shielded up to about 7.4% of the initial neutron flux. Compared to the neat PVA fiber mat, reinforcement of PVA fibers with 1 wt% sol–gel synthesized nano‐sized boron carbide particles enhanced the neutron shielding by 50.31%. Moreover, even though B4C is not an effective gamma shielding reinforcement, the amplified density of nanocomposite fiber mats also enhanced gamma attenuation.

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An Optimization Study for the Electrospun Borate Ester Nanofibers as Light‐Weight, Flexible, and Affordable Neutron Shields for Personal Protection

Özcan

Kaya

2023

Macro Materials & Eng

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In this manuscript, a borate ester solution, as a precursor, is prepared by combining polyvinyl alcohol (PVA) and boric acid (BA). The precursor is then electrospun to form nanofibers. However, the addition of BA has a negative effect on the spinning behavior by changing the conductivity. The solution's quality is enhanced through use of additives such as glycerol, sodium chloride, and acetic acid. The effect of additives on the viscosity and conductivity of solutions, and their spinning behavior, is investigated. By adjusting electrospinning process variables and solution properties, nanofibers are produced. Fourier transform infrared (FT‐IR) analysis is performed to identify the formation of borate ester as a result of the reaction between PVA and BA. Thermal analysis is used to characterize the thermal stability of the fibers. Scanning electron microscopy (SEM) is used to examine the fiber morphology and diameter distribution. The findings are used to determine the best viscosity–conductivity windows for the production of electrospun borate ester nanofibers. Finally, the ability of optimized nanofibers to capture neutrons is evaluated using an Am‐Be neutron source and a BF3 detector set up. The results of the measurements indicate that the incorporation of BA into PVA nanofibers can enhance their neutron shielding capabilities up to 7.3%.

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The Synthesis of Boron Carbide Ceramic via Electrospinning Technique

Cited by 11 publications

References 26 publications

Boron Oxide Glasses and Nanocomposites: Synthetic, Structural and Statistical Approach

Boron Oxide Glasses and Nanocomposites: Synthetic, Structural and Statistical Approach

Boron carbide reinforced electrospun nanocomposite fiber mats for radiation shielding

An Optimization Study for the Electrospun Borate Ester Nanofibers as Light‐Weight, Flexible, and Affordable Neutron Shields for Personal Protection

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