Multi-Jet Electrospinning with Auxiliary Electrode: The Influence of Solution Properties

Wu, Yu-Ke; Wang, Liang; Fan, Jie; Shou, Wan; Zhou, Baoming; Liu, Yong

doi:10.3390/polym10060572

Cited by 31 publications

(21 citation statements)

References 32 publications

(35 reference statements)

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“…However, when the critical voltage value is exceeded, an increase in fiber diameter can be seen due to the decrease in flight time. In addition, increasing the applied voltage causes multiple jet formation during production [38,39]. values, nanofibers appeared to stick together and move away from the fiber appearance.…”

Section: Resultsmentioning

confidence: 99%

Polyacrylonitrile Nanofiber Optimization as Precursor of Carbon Nanofibers for Supercapacitors

Altın¹,

Bedeloğlu²

2020

Journal of Innovative Science and Engineering (JISE)

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Polyacrylonitrile (PAN) nanofibers are one of the primary precursors in the production of carbon nanofibers. The nanofiber morphology is significantly affected by the process parameters such as polymer concentration, distance, applied voltage and feed rate during the production of PAN nanofibers obtained by the solution-based electrospinning method, and these parameters should be optimized properly. In this study, firstly PAN nanofiber production parameters were optimized, and then homogeneous and thin PAN nanofibers produced in optimum conditions were used as the precursor in the production of carbon nanofibers. PAN nanofibers with a diameter of 233 nm were obtained at 7.5% PAN concentration in N,N-dimethylformamide (DMF), 28 kV applied voltage, 17.5 cm nozzle to collector distance, 2 ml/h feed rate and 500 rpm rotation speed of the aluminum drum. The carbon nanofiber diameters produced after the stabilization and carbonization processes were measured as 200 and 140 nm, respectively. The morphological, chemical and thermal properties of the produced nanofibers were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR), thermogravimetric analyzer (TGA). Carbon nanofibers, which are made from optimized electrospun PAN nanofibers, can be used to construct supercapacitors in future studies.

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Section: Resultsmentioning

confidence: 99%

Polyacrylonitrile Nanofiber Optimization as Precursor of Carbon Nanofibers for Supercapacitors

Altın¹,

Bedeloğlu²

2020

Journal of Innovative Science and Engineering (JISE)

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show abstract

“…With electrospinning, the post-processing poling step is not necessary due to the high field within the process. The resulting nanofiber mats also have large surface area due to small fiber diameters [58].…”

Section: Resultsmentioning

confidence: 99%

Breathable and Flexible Piezoelectric ZnO@PVDF Fibrous Nanogenerator for Wearable Applications

et al. 2018

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Abstract:A novel breathable piezoelectric membrane has been developed by growing zinc oxide (ZnO) nanorods on the surface of electrospun poly(vinylidene fluoride) (PVDF) nanofibers using a low-temperature hydrothermal method. Significant improvement in the piezoelectric response of the PVDF membrane was achieved without compromising breathability and flexibility. PVDF is one of the most frequently used piezoelectric polymers due to its high durability and reasonable piezoelectric coefficient values. However, further enhancement of its piezoelectric response is highly desirable for sensor and energy-harvester applications. Previous studies have demonstrated that piezoelectric ceramic and polymer composites can have remarkable piezoelectric properties and flexibility. However, devices made of such composites lack breathability and some present health risks in wearable applications for containing heavy metals. Unlike other piezoelectric ceramics, ZnO is non-toxic material and has been widely used in many applications including cosmetics. The fabrication of ZnO@PVDF porous electrospun membrane involves a simple low-temperature ZnO growth in aqueous solution, which does not weaken the polarization of PVDF created during electrospinning in the high electric field.

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“…In contrast to multiple needles-based electrospinning, free-surface electrospinning requires a very high voltage to overcome the liquid’s surface tension, which depends on the type of spinneret used. It is also difficult to maintain consistent solution viscosity owing to solvent evaporation from the surface [ 76 ]. However, the technology can be used successfully to address the clogging problem associated with the multiple-needle technique because the fiber formation is obtained without the need for needles [ 14 ].…”

Section: Up-scaling Of Nanofiber Productionmentioning

confidence: 99%

Scale-up of Electrospinning: Market Overview of Products and Devices for Pharmaceutical and Biomedical Purposes

et al. 2021

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Recently, the electrospinning (ES) process has been extensively studied due to its potential applications in various fields, particularly pharmaceutical and biomedical purposes. The production rate using typical ES technology is usually around 0.01–1 g/h, which is lower than pharmaceutical industry production requirements. Therefore, different companies have worked to develop electrospinning equipment, technological solutions, and electrospun materials into large-scale production. Different approaches have been explored to scale-up the production mainly by increasing the nanofiber jet through multiple needles, free-surface technologies, and hybrid methods that use an additional energy source. Among them, needleless and centrifugal methods have gained the most attention and applications. Besides, the production rate reached (450 g/h in some cases) makes these methods feasible in the pharmaceutical industry. The present study overviews and compares the most recent ES approaches successfully developed for nanofibers’ large-scale production and accompanying challenges with some examples of applied approaches in drug delivery systems. Besides, various types of commercial products and devices released to the markets have been mentioned.

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Multi-Jet Electrospinning with Auxiliary Electrode: The Influence of Solution Properties

Cited by 31 publications

References 32 publications

Polyacrylonitrile Nanofiber Optimization as Precursor of Carbon Nanofibers for Supercapacitors

Polyacrylonitrile Nanofiber Optimization as Precursor of Carbon Nanofibers for Supercapacitors

Breathable and Flexible Piezoelectric ZnO@PVDF Fibrous Nanogenerator for Wearable Applications

Scale-up of Electrospinning: Market Overview of Products and Devices for Pharmaceutical and Biomedical Purposes

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