Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

Alarifi, Ibrahim M.; Alharbi, Abdulaziz; Khan, Waseem S.; Swindle, Andrew L.; Asmatulu, Ramazan

doi:10.3390/ma8105356

Cited by 118 publications

(63 citation statements)

References 35 publications

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“…PAN‐ co ‐PSSA (15:1) membrane showed a small weight loss below 150 °C due to the loss of absorbed water, indicating the hygroscopic nature of sulfonic acid groups. The second loss between 150 and 500 °C was attributed mainly to the evolutions of ammonia, hydrogen cyanide, and oligomers from the uncyclized portion of PAN, and to the loss of sulfonic acid pendants of PSSA by desulfonation, followed by the loss of polymeric main chain . PVTz was reported to have an extremely fast weight loss around 260 °C, corresponding to the main chain degradation .…”

Section: Resultsmentioning

confidence: 99%

Polyacrylonitrile‐based proton conducting membranes containing sulfonic acid and tetrazole moieties

Sangthumchai

Youngme

Martwiset

2017

J of Applied Polymer Sci

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Proton conducting membranes based on polymers containing sulfonic acid and tetrazole moieties were developed. Successful syntheses of poly(acrylonitrile-co-styrene sulfonic acid) (PAN-co-PSSA), poly(acrylonitrile-co-5-vinyl tetrazole) (PAN-co-PVTz), and poly(acrylonitrile-co-5-vinyl tetrazole-co-styrene sulfonic acid) (PAN-co-PVTz-co-PSSA) were confirmed by 1 H-nuclear magnetic resonance spectroscopy, elemental analysis, and Fourier transform infrared spectroscopy. Two approaches were performed to study the effects of molar ratio of sulfonic acid to tetrazole and tetrazole content on membrane properties. In the first approach, PAN-co-PSSA was blended with PAN-co-PVTz at three molar ratios. The second approach focused on PAN-co-PVTz-co-PSSA membranes with various tetrazole contents. PAN-co-PSSA membrane was also prepared. All solution-cast membranes were hydrolytically stable, except for PAN-co-PVTz-co-PSSA with 71% tetrazole. Surface morphologies of blend membranes were studied using scanning electron microscopy, and no phase separation was observed. Water uptake was shown to increase with increasing tetrazole. All membranes exhibited high thermal stability (up to 250 8C) and high storage moduli. Proton conductivity was found to depend significantly on relative humidity. The influences of sulfonic acid to tetrazole ratio and tetrazole content on proton conduction were observed and discussed. A maximum proton conductivity of 7.1 3 10 23 S/cm at 26 8C was obtained from PAN-co-PSSA membrane. In addition, all tested membranes showed relatively good oxidative stability after treatment in Fenton's reagent. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45411.

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Section: Resultsmentioning

confidence: 99%

Polyacrylonitrile‐based proton conducting membranes containing sulfonic acid and tetrazole moieties

Sangthumchai

Youngme

Martwiset

2017

J of Applied Polymer Sci

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“…Based on the TG/DTA results, the NFs were dried at 150°C for 5 hours to remove DMF. The NFs were calcined at 500°C and 800°C, for PAN cyclization and carbonization . The FT‐IR spectra of Cu, CuSn, Sn, and PAN NFs dried at 150°C were shown in Figure A.…”

Section: Resultsmentioning

confidence: 99%

“…The Cu and Sn precursor solutions for the electrospinning process were prepared by dissolving copper (II) acetate (Cu (CH 3 COO) 2 , KANTO CHEMICAL CO., INC.), tin chloride dihydrate (SnCl 2 2H 2 O, Alfa Aesar), and polyacrylonitrile (PAN, (C 3 H 3 N) x , MW: ~150,000, Polysciences, Inc.) in dimethylformamide (DMF, JUNSEI). PAN was used to regulate the viscosity of the precursor solutions . In addition, because PAN has the property of retaining its fibrous geometry even after heat treatment at high temperatures, we have studied the characteristics of CuSn NFs after calcination at various temperatures.…”

Section: Methodsmentioning

confidence: 99%

Investigation of physicochemical properties of CuSn‐based PAN nanofibers prepared via electrospinning method

Choi

Park

Kang

et al. 2019

Surface & Interface Analysis

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Copper-tin (CuSn) nanomaterials have been receiving substantial attention due to their excellent thermal, electrical, and optical properties. However, how such properties are affected based on heat treatment temperature and chemical composition of copper and tin is still not very well understood. In this paper, CuSn nanofibers were fabricated by electrospinning a precursor solution of polyacrylonitrile, copper, and tin. Calcination temperatures were selected using thermogravimetric/differential thermal analysis (TG/DTA) and Fourier transform infrared (FT-IR) results. Analytical techniques such as scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS) were employed to investigate the physicochemical properties of the CuSn nanofibers. SEM images and EDS revealed the formation of pores on the nanofibers and high concentrations of tin were in the core, while copper was located on the surface. XRD results confirmed the monoclinic phase of Cu 6 Sn 5 for the CuSn nanofibers because peaks for diffraction angles at 27.6°, 53.4°, and 60.0°were observed. XPS results showed that Cu-C and Sn-C bonds occur at binding energies around 932 and 484 eV, respectively. The work function of the CuSn NF heat treated at 150°C was calculated from the UPS spectra, and the value was 4.19 eV.

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“…The strong IR peak at 2243 cm −1 can be assigned to nitrile and the peaks at 1072 cm −1 , 1453 cm −1 and 2940 cm −1 are representative for methylene groups [26,29]. Other researchers reported peaks at around 1700 cm −1 which corresponded to the carbonyl groups of residual DMF solvent [26].…”

Section: Resultsmentioning

confidence: 99%

Development of adsorptive membranes by confinement of activated biochar into electrospun nanofibers

Taheran¹,

Naghdi²,

Brar³

et al. 2016

Beilstein J. Nanotechnol.

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Adsorptive membranes have many applications in removal of contaminants, such as heavy metals and organic contaminants from water. Recently, increasing concentrations of pharmaceutically active compounds, especially antibiotics, such as chlortetracycline in water and wastewater sources has raised concerns about their potentially adverse impacts on environment and human health. In this study, a series of polyacrylonitrile (PAN)/activated biochar nanofibrous membranes (NFMs) with different loadings of biochar (0–2%, w/w) were fabricated using electrospinning. The morphology and structure of fabricated membranes was investigated by scanning electron microscopy, Fourier transform infrared and thermogravimetric analysis. The results showed that at 1.5% of biochar loading, the surface area reached the maximum value of 12.4 m2/g and beyond this loading value, agglomeration of particles inhibited fine interaction with nanofibrous matrix. Also, the adsorption tests using chlortetracycline showed that, under environmentally relevant concentrations, the fabricated adsorptive NFMs had a potential for removal of these types of emerging contaminants from water and wastewaters.

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Thermal, Electrical and Surface Hydrophobic Properties of Electrospun Polyacrylonitrile Nanofibers for Structural Health Monitoring

Cited by 118 publications

References 35 publications

Polyacrylonitrile‐based proton conducting membranes containing sulfonic acid and tetrazole moieties

Polyacrylonitrile‐based proton conducting membranes containing sulfonic acid and tetrazole moieties

Investigation of physicochemical properties of CuSn‐based PAN nanofibers prepared via electrospinning method

Development of adsorptive membranes by confinement of activated biochar into electrospun nanofibers

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