Centrifugal force spinning of PA6 nanofibers – processability and morphology of solution-spun fibers

Hammami, Mohamed Amen; Krifa, Mourad; Harzallah, Omar

doi:10.1080/00405000.2013.842680

Cited by 63 publications

(57 citation statements)

References 20 publications

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“…Nanofiber spinning tests were conducted using a Cyclone L-1000 M/D laboratory Forcespinning machine (FibeRio Technology Corp., McAllen, TX) in a factorial design with the solution concentration, spinneret rotation speed, and spinneret needle gage as independent variables. Detailed discussion of the selected predictor variable combinations was presented in (Hammami et al, 2014). In summary, three levels of spinning solution concentration were tested, i.e.…”

Section: Spinning Trialsmentioning

confidence: 99%

“…This is different from the case of electrospinning, where the draw ratio is controlled by the electric fields, independently from the material delivery rate controlled through the syringe pump. These conflicting phenomena have been evidenced in recent studies focusing on Forcespinning, where the spinneret rotation speed appeared to have little effect on fiber diameter (Hammami, Krifa, & Harzallah, 2014;Shanmuganathan et al, 2012), while other studies indicate the potential for a significant impact (McEachin & Lozano, 2012;Padron et al, 2011Padron et al, , 2012. Shanmuganathan et al (2012) investigated melt Forcespinning of Poly(butylene terephthalate) and noted that melt temperature may be a more important determinant of fiber diameter than spinneret rotation speed.…”

mentioning

confidence: 90%

“…In a recent work, we conducted to investigate the impact of polymer solution and Forcespinning processing parameters on PA6 fiber diameter (Hammami et al, 2014), we found that polymer solution's viscosity played a major role in determining both processability and fiber diameter distribution. We also observed the potential for the occurrence of bead-on-string structures similar to those usually seen in electrospinning.…”

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confidence: 98%

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Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Krifa

Hammami

2014

The Journal of The Textile Institute

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This research aimed at investigating the morphology and frequency of bead-on-string occurrences on forcespun nano-and sub-micron fibers. The formation of bead-on-string structures was observed on a range of fiber samples forcespun in varied conditions from PA6 solutions of different concentrations. Bead-on-string structures were characterized for morphology using SEM micrographs, and were counted on all samples. Two major factors appeared to affect both the morphology and the bead count, namely spinning solution concentration, i.e. viscosity, and spinning needle gage or diameter. Low viscosity solutions resulted in large numbers of mostly spherical beads. Solutions with higher viscosity appeared to suppress the fluid jet instability thus resulting in significantly fewer beads with exclusively elongated spindlelike shapes. Spinning needle diameter also had a significant impact on beading behavior, with the larger diameter exhibiting higher bead counts. A significant interaction between the two factors was detected and its impact on the competition between the fluid jet visco-elastic relaxation and the Rayleigh instability is discussed.

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Section: Spinning Trialsmentioning

confidence: 99%

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confidence: 90%

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confidence: 98%

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Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Krifa

Hammami

2014

The Journal of The Textile Institute

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“…With advantages of low cost and high e±ciency, centrifugal spinning technology has been developed from the initial preparing arti¯cial hair to the recent fabricating nano¯ber membranes. 55,56 Ou et al 57 reported for the¯rst time on the fabrication of a robust, thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) hydrogel-coated PU membrane by centrifugal spinning for e®ective separation of oil/water emulsions. The reason of selecting thermoplastic PU was its high tensile strength, wear resistance and good°exibility over a wide temperature range.…”

Section: Centrifugal Spinning Methodsmentioning

confidence: 99%

Recent Progress of Polyurethane-Based Materials for Oil/Water Separation

Guo

Liu

Dang

et al. 2017

NANO

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With the development of society, oil pollution has become more and more serious, it is becoming a global issue to separate oil and water mixture. Currently, a variety of functional materials have been successfully prepared for oil/water separation. Among them, polyurethane is an attractive candidate due to its low cost, wear-resistance and excellent mechanical properties. This report summarizes the design strategy of polyurethane-based materials and their applications in oil/ water separation. The progress made so far will guide further development of polyurethane-based materials for oil/water separation.

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“…To date, various technologies have been applied in preparing nanober membranes, including centrifugal force spinning, [22][23][24] phase separation, 25-27 electrospinning 28-30 and melt blending extrusion. [31][32][33] The melt-blending extrusion method for preparing various kinds of polymer nanobers is environment friendly, highly efficient, versatile and continuous.…”

Section: -21mentioning

confidence: 99%

Aminated EVOH nanofiber membranes for Cr(vi) adsorption from aqueous solution

Yan

et al. 2018

RSC Adv.

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Ethylene vinyl alcohol (EVOH) nanofiber membranes were prepared by melt-blending extrusion with cellulose acetate butyrate ester (CAB) as the matrix and a high-speed flow deposition process. Then, aminated-EVOH (L-Lys/EVOH, Cy/L-Lys/EVOH and DETA/EVOH) nanofiber membranes were prepared for hexavalent chromium [Cr(VI)] removal by facile chemical modification on the surface of EVOH nanofiber membranes. Scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were carried out to test the morphology and structure of aminated-EVOH nanofiber membranes. Adsorption experiments suggested that amination was beneficial to adsorption, and the optimal pH for prepared membranes to Cr removal was 2.0.Adsorption kinetics analysis revealed that the adsorption process was successfully fitted with a Pseudosecond-order model. The Freundlich isothermal model well described the adsorption isotherm data. A thermodynamic study suggested that the adsorption process was endothermic and spontaneous.Aminated-EVOH nanofiber membranes exhibited excellent reusability for Cr removal. The Cr adsorption efficiency of DETA/EVOH nanofiber membranes retained up to 98.73% of the initial adsorption after 6 successive adsorption-desorption cycles.

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Centrifugal force spinning of PA6 nanofibers – processability and morphology of solution-spun fibers

Cited by 63 publications

References 20 publications

Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Recent Progress of Polyurethane-Based Materials for Oil/Water Separation

Aminated EVOH nanofiber membranes for Cr(vi) adsorption from aqueous solution

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