A method for scale‐up of co‐electrospun nanofibers via flat core‐shell structure spinneret

Wu, Huihui; Zheng, Yuansheng; Zeng, Yongchun

doi:10.1002/app.41027

Cited by 3 publications

(3 citation statements)

References 23 publications

(28 reference statements)

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“…We believe that the formation of these coils results from the interface interaction of the TPU phase and the Nomex phase due to their nonuniform shrinking behavior. In our previous study, the jets formed from a coaxial spinneret and a single-needle spinneret of the electrospinning systems have been shown. The deflection of the jet at the beginning stage of the spinning process is not observed in coaxial and single-needle electrospinning.…”

Section: Results and Discussionmentioning

confidence: 98%

Fabrication of Helical Nanofibers via Co-Electrospinning

Zheng

Zeng

2015

Ind. Eng. Chem. Res.

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Co-electrospinning is a new branch of nanotechnology for producing composite nanofibers with collective functions and special fiber structures. Helical fibers in nanoscale have been of increasing interest because of their unique characteristics. In this work, we report the fabrication of the helical nanofibers with polyurethane and poly(m-phenylene isophthalamide) by the co-electrospinning system with an off-centered core–shell spinneret. High-speed photography and three-dimensional (3D) electric field simulation are carried out to help in understanding the formation of the helical structures. The asymmetrical electric field distribution may be a factor affecting helical fiber formation. We also show that a series of factors such as the applied voltage, the conductivity of the system, and the composite ratio have considerable effects on the morphologies of the produced helical nanofibers. This work can provide a promising technique for producing nanofibrous nonwovens with helical fiber morphology.

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Section: Results and Discussionmentioning

confidence: 98%

Fabrication of Helical Nanofibers via Co-Electrospinning

Zheng

Zeng

2015

Ind. Eng. Chem. Res.

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“…The coaxial spinneret, the key factor in producing core−shell fibers and one of the most important factors influencing the morphology and property of core−shell fiber, has attracted the great interest of researchers. Wu et al developed a flat core− shell structure spinneret with a flat surface, 16 and found that core−shell fibers produced by this spinneret were finer and exhibited better morphology compared with conventional needle coelectrospinning. Rahimi and Mokhtari 17 declared that the inner nozzle lengths of coaxial nozzles had an enormous impact on structured core−shell hexadecane−polyurethane nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Roles of Coaxial Spinneret in Taylor Cone and Morphology of Core–Shell Fibers

Zheng

Xin

et al. 2018

Ind. Eng. Chem. Res.

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This paper reports on the roles of three coaxial spinnerets with different electric field distributions, including retracting spinneret, flat spinneret, and protruding spinneret in the Taylor cone, jet motion, and resultant core−shell fibers. The Taylor cone, jet motion, and the morphology and internal structure of resultant core−shell fibers for these three abovementioned spinnerets are systematically studied. The results show that the Taylor cone, jet motion, and core−shell fiber morphology are influenced by the electric field distribution induced by different spinneret structures. The retracting spinneret produces a thinner fiber with groove morphology due to the shorter straight jet length, larger envelope angle and higher whipping frequency. On the contrary, the protruding spinneret causes coarser and porous morphology fibers because of the longer straight jet length, smaller envelope angle, and lower whipping frequency. The jet motion has a tremendous influence on the fiber diameter and surface morphology; in addition, the internal structure of core−shell fiber is affected by the morphology of the Taylor cone.

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“…Zheng et al [13] designed a new multihole spinneret with equilateral hexagon hole array to meet a highproduction requirement and high quality of nanofibers. Wu et al [14] developed an approach to the scale-up of co-electrospinning via a flat core-shell structure spinneret which has a flat surface involves shell holes and core needles to fabricate composite nanofibers with special morphologies.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of coaxial electrospun polysulfone amide/polyurethane

Xin

2016

Journal of Industrial Textiles

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In this study, a novel approach and the related equipment of coaxial electrospinning have been developed to fabricate a new ultrafine polysulfone amide/polyurethane coaxial fibers at nanoscale, with the polysulfone amide as the core and the polyurethane as the shell of the blended fibers. As the co-spinneret has effects on the structure and properties of the spun fiber, three types of co-spinnerets with different diameters were designed to investigate its effects on the fabricated fibers in this research. Three series of polysulfone amide/polyurethane coaxial fibers were spun using the self-developed coaxial electrospinning equipment, and these fibers were characterized systematically using scanning electron microscope, transmission electron microscope, X-ray diffraction, differential scanning calorimeter and thermogravimetric. High-speed photography was used to digitalize the image of the tailor cone and jet motion of polymer fluid during the spinning process, which provides a detailed description of the electrospinning for the further theoretical analysis. The three-dimensional electric field simulation was also carried out to model the differences of electric field. Our experimental results show that the mechanical and thermal properties of the core–shell fibers fabricated in this research have been improved in the comparison with the fibers spun using the conventional single-needle electrospinning method. The composite fibers have the core–shell structure, so that it can combine the excellent thermal properties of the polysulfone amide and the excellent mechanical properties of the polyurethane. The newly developed polysulfone amide/polyurethane fiber could be used in the field of industrial textiles; it has the potential applications for the development of high-performance apparels in the future.

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A method for scale‐up of co‐electrospun nanofibers via flat core‐shell structure spinneret

Cited by 3 publications

References 23 publications

Fabrication of Helical Nanofibers via Co-Electrospinning

Fabrication of Helical Nanofibers via Co-Electrospinning

Roles of Coaxial Spinneret in Taylor Cone and Morphology of Core–Shell Fibers

Preparation and characterization of coaxial electrospun polysulfone amide/polyurethane

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