Alignment of electrospun polystyrene with an electric field

Chanunpanich, Noppavan; Byun, Hongsik

doi:10.1002/app.24694

Cited by 10 publications

(9 citation statements)

References 31 publications

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“…As a matter of fact, the morphology of the electrospun polymer fibers is dependent on many parameters − solution properties, processing conditions, and ambient conditions. 29,30 However, solution properties are one of the most important parameters in electrospinning technique. The molecular weight of the polymer is the first issue to be considered.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, we found alignment of electrospun PS on an aluminized flat collector. 30 This result stemmed from the interaction of the aromatic ring of PS molecules with the external voltage, yielding dipoles. Presumably this dipole makes the chain elongation, and then the aromatic rings are aligned and frozen during travel to the grounded collector.…”

Section: Resultsmentioning

confidence: 99%

“…Current research efforts are focused on using electrospun fibers for filtration, chemical/biological resistant protective clothing, tissue engineering, and electronic applications. [1][2][3][4][5] In electrospinning, a polymer solution is ejected from a capillary by a strong electrostatic force and deposited as a non-woven fibrous mat on an electrically grounded target. As this jet travels through the air, the solvent evaporates, leaving behind ultrafine polymer fibers.…”

Section: Introductionmentioning

confidence: 99%

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A study of electrospun PVDF on PET sheet

2008

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PVDF (Kynar ® 761) nanofibers were made by electrospinning with an external voltage of 6-10 kV, a traveling distance of 7-15 cm and a flow rate of 0.4-1 mL/h. Although the mean diameter of the fibers has not changed significantly, the conditions affected the change in diameter distribution. This was attributed to interactions, both attraction and repulsion, between the positive charges on the polymer solutions and the electrically grounded collector. Higher voltages and traveling distance increased the level of attraction between the positive charge on the polymer solution and the electrically grounded collector, resulting in a narrow diameter distribution. In addition, a high flow rate allowed a high population of uniformly charged solutions to travel to the grounded collector, which resulted in a narrow diameter distribution. The optimum conditions for electrospinning of PVDF in DMAc/acetone (3/7 by wt) were a collector voltage of 6 kV, a syringe tip to collector of 7 cm, a flux rate of 0.4 mL/h and 10 kV, 10 cm, 1 mL/h. Since PVDF is widely used as a filtration membrane, it was electrospun on a PET support with a rotating drum as a grounded collector. Surprisingly, some straight nanofibers were separated from the randomly deposited nanofibers. The straight nanofiber area was transparent, while the randomly deposited nanofiber area was opaque. Both straight nanofibers and aligned nanofibers could be obtained by manipulating the PET drum collector. These phenomena were not observed when the support was changed to an Al sheet. This suggests that a pseudo dual collector was generated on the PET sheet. No negative charge was created because the PET sheet was not a conductive material. However, less charge was created when the sheet was not perfectly attached to the metal drum. Hence, the nanofibers jumped from one grounded site to the nearest one, yielding a straight nanofiber.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A study of electrospun PVDF on PET sheet

2008

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“…This technique has been used to manufacture man-made fibers since 1934 [16] and has applicable to variety of polymers and composite polymers [17,18]. Those three-dimensional electrospun fibrous mats with high specific surface and high surface roughness have been demonstrated potential applications in sensors [19][20][21], filtration [22], dye-sensitized solar cells [23], biocatalysts [24], tissue engineering [25], surface super-hydrophobicity [13,14], etc.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and wettable behavior of polyacrylonitrile reinforced fibrous polystyrene mats

Sun

Ding

et al. 2010

Journal of Colloid and Interface Science

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“…Electrospinning is a technology that provides a simple and versatile method for generating ultrathin fibers from a rich variety of materials that include polymers [1][2][3][4][5] , composites [6][7][8] , and ceramics [9][10][11][12] , with diameters in the range of from several micrometers down to tens of nanometers. It has unparalleled in their porosity, large surface area per unit mass, the fineness and uniformity of their fibers, and potential uses of this technique.…”

Section: Introductionmentioning

confidence: 99%

Control of diameter and morphology of poly(vinylidene fluoride) nanofibers fabricated by electrospinning

Jing

Jiang

2009

2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications

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This paper described a procedure based on electrospinning for generating nanofibers with controllable diameters and morphology. When an acetone and N,N-dimethylacetamide (DMAc) mixture solvent containing poly(vinylidene fluoride) (PVDF) was injected through a needle under a strong electric field, nanofibers made of PVDF formed as a result of electrostatic jetting. To control the diameter and morphology of PVDF nanofibers, the solution properties and process parameters were investigated, such as polymer concentration, the ratio of the mixture solvent, feeding rate, applied electric field, and needle-to-collector distance. The fabricated fibers were 30-8000 nm in diameter. The increase in the polymer concentration caused an increase in the fiber diameter. However, the increase in the feeding rate and applied electric field decreased the fiber diameter. Variation in the needle-to-collector distance did not result in significant changes in the fiber diameter. The ratio of the solvent also had a very significant impact on electrospinning. The diameter and morphology of the PVDF nanofibers were characterized by optical microscope and scanning electron microscope (SEM).

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Alignment of electrospun polystyrene with an electric field

Cited by 10 publications

References 31 publications

A study of electrospun PVDF on PET sheet

A study of electrospun PVDF on PET sheet

Mechanical and wettable behavior of polyacrylonitrile reinforced fibrous polystyrene mats

Control of diameter and morphology of poly(vinylidene fluoride) nanofibers fabricated by electrospinning

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