PAN monofilament in nanoscale: a novel approach

Sadrjahani, Mehdi; Hoseini, Sayed Ali; Mottaghitalab, Vahid; Haghi, A. K.

doi:10.1515/epoly.2011.11.1.179

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Even then, the little output of fluid in single-needle electrospinning restricts the production capacity on industrial scale, which is mainly less than 0.3 g/h [28,29]. There are several suggestions for the improvement in the electrospinning production rate [30].…”

Section: Introductionmentioning

confidence: 99%

A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

et al. 2015

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The current study focuses on the production of cellulose nanofiber through semi-industrial nozzleless electrospinning process. The cellulose biopolymer used for spinning process was extracted from rice straw as renewable, abundant, and inexpensive natural resource. The electrospinning device comprising one needle is extremely inefficient because of low productivity level of about 0.3 g/h. Thus, using the nozzleless electrospinning system guarantees the high productivity of nanofiber web for diverse applications. The successful electrospinning process is accomplished through systematic control of the surface tension, viscosity, and electric conductivity of aqueous solutions of cellulose. Moreover, a design expert software was used for providing experimental plan for the investigation of the influence of the operational conditions on the spinning properties of the selected solution. The polyvinyl alcohol with a weight ratio of 60 % relative to cellulose content was used as a biocompatible polymer to facilitate electrospinning process for producing the aqueous cellulose solution of 0.63 wt%. Based on the scanning electron microscopy images, and various selected parameters, namely, the drum rotation rate of 9 rpm, high voltage range of ±55 kV, the spinning temperature of 41°C, and 10-cm distance between drum and collector an average diameter of 89 ± 1 nm was arrived. The composite nanofibers used for filter production and their performance were evaluated by porosity analysis and permeability tests. Results show the negative impact of the weak mechanical strength as an obstacle in Penetration test. (It promotes by higher electrospinning time and reaching proper stiffness in web layer.) The permeability tests show a maximum value of 3.5 cm 3 /cm 2 /s at the maximum pressure of 120 Pa.

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Section: Introductionmentioning

confidence: 99%

A feasibility study on semi industrial nozzleless electrospinning of cellulose nanofiber

et al. 2015

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“…Moreover, access to the lower diameter makes the ratio of surface area to volume roughly more than 1000 times as compared to that of the microfiber. The continuous formation of nanofiber is another characteristic of electrospun nanofiber compared to the other forms of cellulose nanostructure [36]. In electrospinning process, a strong electric field is applied on a droplet of polymer solution (or melt) held by its surface tension at the tip of a syringe's needle (or a capillary tube).…”

Section: Introductionmentioning

confidence: 99%

Electrospun cellulosic structure nanofibre based on rice straw

Mottaghitalab

Farjad

2013

Journal of Polymer Engineering

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The present investigation compares the diverse methods of cellulose extraction from rice straw. Furthermore, the purified cellulosic material was utilized for the electrospinning of cellulose nanofibers. Based on the differential scanning calorimeter and Fourier transform infrared spectroscopy analyses, the new protocol was compared to the other methods showing lower amorphous structure and also lower lignin and hemicellulose in crystalline α-cellulose structure. The protocol, which included ultrasonic mechanical treatment, showed a higher crystallinity of the corresponding cellulose giving microfibers of 2.9 ± 0.2 μm in average diameter based on the scanning electron microscope images. Cellulose nanofiber was prepared from its solution in trifluoroacetic acid using general one-step electrospinning process. The simultaneous effects of four processing variables including solution concentration (C), applied voltage (V), spinning distance (d), and volume flow rate (Q) on mean fiber diameter (MFD) and standard deviation of fiber diameter (StdFD) were investigated quantitatively and qualitatively. A range of MFD between 96 ± 26 nm and 292 ± 35 nm was recorded for further analysis. The response surface methodology was employed to establish quadratic models for MFD and StdFD. 2 adj R was found to be 96.18% and 91.25%, respectively, for the MFD and StdFD models, showing the good prediction ability of the models. The response surface plots showed strong relationship among variables.

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