Simulation and experimental study of parameters in multiple-nozzle electrospinning: Effects of voltage and nozzle configuration on the electric field and electrospun jet attributes

SalehHudin, Hanna Sofia; Mohamad, Edzrol Niza; Afifi, Amalina M.; Mahadi, Wan Nor Liza Binti Wan

doi:10.1016/j.jmapro.2022.11.051

Cited by 6 publications

(5 citation statements)

References 27 publications

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“…One possible explanation could be that the naturally occurring inhomogeneities during spinning the first layers, based on jets from polymer solution starting at arbitrary wire positions and landing on arbitrary positions on the substrate, would not level out during spinning for longer durations, but rather intensify. This would be the case if the dielectric constants of the PP substrate and the PAN nanofibers differed strongly, as has been shown in previous investigations [15]. However, the dielectric constant of PAN (~3 [34]) and of PP (~2 [15]) are quite similar, so that this explanation is not valid.…”

Section: Resultsmentioning

confidence: 70%

“…This would be the case if the dielectric constants of the PP substrate and the PAN nanofibers differed strongly, as has been shown in previous investigations [15]. However, the dielectric constant of PAN (~3 [34]) and of PP (~2 [15]) are quite similar, so that this explanation is not valid.…”

Section: Resultsmentioning

confidence: 70%

“…Amongst the most important parameters of nanofiber mats prepared from a single polymer, such as poly(acrylonitrile) (PAN), the thickness of the nanofibers, the porosity and pore size distribution of the mat, and the macroscopic membrane thickness can be mentioned [ 12 ]. It is well known that the electric field can influence these parameters [ 13 , 14 , 15 ], so that it can be expected that large nanofibrous membranes spun in a needleless process will have other physical properties at the borders, compared to the middle. Nevertheless, these variations along large nanofiber mats are only scarcely reported in the literature [ 10 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Homogeneity of Needleless Electrospun Nanofiber Mats

Morina,

Dotter,

Döpke

et al. 2023

Nanomaterials

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Nanofiber mats can be electrospun by different techniques, usually subdivided into needle-based and needleless. The latter allow for producing large-area nanofiber mats, e.g., with a width of 50 cm and lengths of several meters, if electrospinning proceeds for several hours, depending on the required thickness. Even spinning smaller samples, however, raises the question of homogeneity, especially if defined mechanical properties or a defined thickness is required, e.g., for filtration purposes. Very often, only the inner parts of such electrospun nanofiber mats are used to avoid too high variation of the nanofiber mat thickness. For this study, we used wire-based electrospinning to prepare nanofiber mats with slightly varying spinning parameters. We report investigations of the thickness and mass per unit area, measured on different positions of needleless electrospun nanofiber mats. Martindale abrasion tests on different positions are added as a measure of the mechanical properties. All nanofiber mats show unexpectedly strong variations of thickness, mass per unit area, and porosity, as calculated from the apparent density of the membranes. The thickness especially varied by nearly one order of magnitude within one sample, while the apparent density, as the most uniform parameter, still showed variations by more than a factor of two within one sample. This shows that even for apparently highly homogeneous areas of such nanofiber mats, variations cannot be neglected for all potential applications.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Homogeneity of Needleless Electrospun Nanofiber Mats

Morina,

Dotter,

Döpke

et al. 2023

Nanomaterials

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“…Similarly, İçoğlu et al 30 addressed jet instability issues by modifying the auxiliary electrode geometry and adjusting interelectrode distances while simulating the electric field environment of electrostatic spinning. SalehHudin et al 31 optimized strength distribution during spinning based on needle positioning and voltage simulation results, thereby improving fiber membrane quality. Hence, simulating the electric field during spinning accurately reflected real‐world conditions.…”

Section: Resultsmentioning

confidence: 99%

Artificial neural networks for the accurate prediction of the thickness of fiber membranes prepared by airflow‐assisted electrostatic spinning

Ma,

Zheng,

Zeng

et al. 2024

J of Applied Polymer Sci

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The practical application of fiber membranes prepared by electrostatic spinning requires a uniform thickness. However, the parameters involved in the spinning process are highly complex, particularly when it comes to precise control over membrane thickness. Hence, achieving a consistent and homogeneous thickness for fiber membranes has posed significant challenges thus far. To accurately predict membrane thickness during the spinning process and ensure consistent outcomes, this study employed polyvinylidene fluoride as the raw material and optimized electrostatic spinning preparation using an innovative airflow‐assisted strategy. The as‐proposed preparation strategy effectively enhances the volatilization of solvents within the jet, also promotes jet stretching through assistance from airflow, resulting in a more stable and homogeneous fiber diameter. Additionally, COMSOL simulations were utilized to provide rational explanations for these findings. By collecting multiple process parameters, including positive voltage, liquid supply speed, winding speed, and solution concentration, this study has successfully developed an artificial neural network (ANN) that exhibits reliable predictive capabilities for membrane thickness. Notably, the model demonstrates a remarkable goodness‐of‐fit with an R2 value of 0.9981. Through the integration of ANN with electrostatic spinning technology, significant advancements have been achieved in accurately predicting and controlling the uniformity of electrostatically spun polymer fiber membranes.

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“…Jiang et al 21 designed an arc arrangement multi‐nozzle electrospinning system, which has a more uniform electric field distribution, as compared with the linear arrangement of nozzles. Saleh Hudin et al 22 investigated the influence of different nozzle arrangements and voltages on electric field distribution at the nozzle tip and jet characteristics through the numerical simulation and experiment. They showed that electric field intensity at the nozzle decreased with the increase in the number of nozzles.…”

Section: Introductionmentioning

confidence: 99%

The effect of nozzle spacing on the electric field and fiber size distribution in a multi‐nozzle electrospinning system

Jin

Yeom

Lee

et al. 2023

J of Applied Polymer Sci

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The present study investigates the characteristics of nanofiber uniformity in a multi-nozzle electrospinning system widely used to prepare nanofiber matrix. The effect of nozzle spacing on the electric field and nanofiber diameter uniformity is analyzed using a four-nozzle electrospinning system. The electric field distribution at the nozzle tip at different nozzle spacings is simulated numerically using COMSOL Multiphysics 5.6. Simulation results find that as nozzle spacings increase from 1 to 5 cm, the average electric field intensity at 1 mm from the tip of four nozzles increases from 32.46 to 40.08 kV/cm. Variations of electric field intensity at a given spacing decrease from 11% to 3.2% for spacings of 1 to 5 cm. Corresponding experiments are conducted with a gelatin solution. As the nozzle spacing increases, the four nozzles produce nanofibers with diameters of 88-508 nm, 112-498 nm, and 90-418 nm. Nanofiber diameter uniformity increases, and the average diameter decreases from 268 to 222 nm. In addition, the effect that changes in voltages and nozzle-to-collector distances have on fiber diameter is also studied.The experiments show that nanofiber diameter decreased as voltage increased and increased as nozzle-to-collector distance increased.

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Simulation and experimental study of parameters in multiple-nozzle electrospinning: Effects of voltage and nozzle configuration on the electric field and electrospun jet attributes

Cited by 6 publications

References 27 publications

Homogeneity of Needleless Electrospun Nanofiber Mats

Homogeneity of Needleless Electrospun Nanofiber Mats

Artificial neural networks for the accurate prediction of the thickness of fiber membranes prepared by airflow‐assisted electrostatic spinning

The effect of nozzle spacing on the electric field and fiber size distribution in a multi‐nozzle electrospinning system

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