Study of charge storage in the nanofibrous poly(ethylene terephthalate) electrets prepared by electrospinning or by corona discharge method

Ignatova, Miléna; Yovcheva, T.; Viraneva, A.; Mekishev, G.; Manolova, Nevena; Rashkov, Iliya

doi:10.1016/j.eurpolymj.2008.04.027

Cited by 49 publications

(35 citation statements)

References 14 publications

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“…Electrets, which are able to retain electric charges over a long period of time and to create an external quasistatic electric field, are known extremely important to charge trapping and to enhance the filtration properties [25,26]. Because of the excellent electret behavior arises from the dipole orientation and the charge storage, silica (SiO 2 ) electrets are considered to be promising candidates for designing novel electreted fibrous materials for air filtration [27,28].…”

Section: Introductionmentioning

confidence: 99%

Electreted polyetherimide–silica fibrous membranes for enhanced filtration of fine particles

Wang

Fan

et al. 2015

Journal of Colloid and Interface Science

178

117

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Section: Introductionmentioning

confidence: 99%

Electreted polyetherimide–silica fibrous membranes for enhanced filtration of fine particles

Wang

Fan

et al. 2015

Journal of Colloid and Interface Science

178

117

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“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] Considering the unique properties of PET, various applications of PET nanofibers have been developed. [9][10][11]13,15,16,[18][19][20][21][22][23] These include filtration, 9,16,19,20 phase change materials (PCM), 10,13 charge storage, 11 and biomedical applications. 15,18,21,22 However, very few studies addressed with a satisfactory level of details the structure and properties of PET nanofibers produced by solution electrospinning.…”

mentioning

confidence: 99%

Fundamental study of crystallization, orientation, and electrical conductivity of electrospun PET/carbon nanotube nanofibers

Mazinani

Ajji

Dubois

2010

J Polym Sci B Polym Phys

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The morphology, structure, and properties of polyethylene terephthalate (PET)/Carbon Nanotubes (CNT) conductive nanoweb were studied in this article. Nanocomposite nanofibers were obtained through electrospinning of PET solutions in trifluoroacetic acid (TFA)/dichloromethane (DCM) containing different concentrations and types of CNTs. Electrical conductivity measurements on nanofiber mats showed an electrical percolation threshold around 2 wt % multi‐wall carbon nanotubes (MWCNT). The morphological analysis results showed smoother nanofibers with less bead structures development when using a rotating drum collector especially at high concentrations of CNTs. From crystallographic measurements, a higher degree of crystallinity was observed with increasing CNT concentrations above electrical percolation. Spectroscopy results showed that both PET and CNT orientation increased with the level of alignment of the nanofibers when the nanotube concentration was below the electrical percolation threshold; while the orientation factor was reduced for aligned nanofibers with higher content in CNT. Considerable enhancement in mechanical properties, especially tensile modulus, was found in aligned nanofibers; at least six times higher than the modulus of random nanofibers at concentrations below percolation. The effect of alignment on the mechanical properties was less important at higher concentrations of CNTs, above the percolation threshold. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 2052–2064, 2010

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“…This residual potential within the membrane likely has a substantial influence on the electric field, whereas the decay is quite slow compared the time of the electrospinning process. Collins et al (2012) describes an initial residual potential of more the 1 kV with a half-life 410 h in electrospun polystyrene membranes and also Ignatova et al (2008) observed a rather strong decay of the surface potential within a time frame of 10 days for spun PET membranes, while an elevated potential was evident for up to 50 days. However this effect seems to be advantageous for fibre alignment using deflector plates, since the jet instability in the initial spinning phase with a "clean" collector might not be strong enough to be influenced by the alternating deflection field, whereas this might be the case with increasing jet instability.…”

Section: Discussionmentioning

confidence: 87%

Oriented nanofibrous membranes for tissue engineering applications: Electrospinning with secondary field control

Walser

Ferguson

2016

Journal of the Mechanical Behavior of Biomedical Materials

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Electrospinning is an electrical field driven method to produce polymer fibre membranes by deposition of a charged polymer jet onto a grounded collector. Fibre alignment within these mats is usually achieved by a fast collector movement, which is not feasible for all collector geometries, such as small diameter tubes or free-form moulds. The aim of this study was to evaluate the use of charged deflector plates to apply a dynamic, alternating electrical field perpendicular to the spinning direction, in order to directly control the fibre trajectory. Different field signal types, deflector plate voltages and deflection frequency ranges have been investigated. 210 poly(ɛ)caprolactone (PCL) membranes were electrospun. SEM images of each membrane were analysed using ImageJ. Main fibre diameter and orientation, as well as the degree of fibre alignment, were calculated, while a subset of the spun scaffolds were tested for their tensile properties. Higher deflector plate voltage amplitude resulted in a better fibre alignment. The best alignment was observed in a low deflection frequency range from 2 to 10 Hz. Mean main fibre direction was 87±18°, relative to the deflection axis, while fibre alignment had only a minor effect on the average fibre diameter. Young's modulus and yield stress increased with the ratio of the parallel fibre component. The feasibility of the described method to achieve fibre alignment was demonstrated. However, the main fibre direction is not aligned with the deflection axis, but consistently perpendicular to it, which is also reflected in the tensile properties of spun samples.

show abstract

Study of charge storage in the nanofibrous poly(ethylene terephthalate) electrets prepared by electrospinning or by corona discharge method

Cited by 49 publications

References 14 publications

Electreted polyetherimide–silica fibrous membranes for enhanced filtration of fine particles

Electreted polyetherimide–silica fibrous membranes for enhanced filtration of fine particles

Fundamental study of crystallization, orientation, and electrical conductivity of electrospun PET/carbon nanotube nanofibers

Oriented nanofibrous membranes for tissue engineering applications: Electrospinning with secondary field control

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