Effect of nanocrystalline cellulose addition on needleless alternating current electrospinning and properties of nanofibrous polyacrylonitrile meshes

Abstract

Needleless alternating current (AC)-electrospinning is capable of achieving high nanofiber generation rates while adding more flexibility to the process development when compared to common direct current (DC)-electrospinning. However, ACelectrospinning process may produce very different results than DC-electrospinning when using the same precursors. This study demonstrated that stable AC-electrospinning of uniform and mechanically strong polyacrylonitrile (PAN) nanofibrous meshes can be achieved at 30 6 5 kV rms voltage when 0.75-6.0 wt % of nanocrystalline cellulose-II with respect to PAN is added to a typical PAN precursor solution. Efficient generation (up to 2 g/h rate or 0.7 g h 21 cm 22 mass flux) of nanofibers with 250-500 nm fiber diameters has been observed when using flat fiber-generating electrodes with diameters up to 25 mm. Depending on the amount of nanocellulose, nanofibrous nanocellulose/PAN meshes revealed large variations in tensile modulus (90-273 MPa) and yield strength (1.0-2.5 MPa), whereas the fiber diameter, air permeability, air resistance, mesh porosity, and water absorption were less affected. V C 2017Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45772.

Nanocellulose and Elastin Act as Plasticizers of Electrospun Bioinspired Scaffolds

“…Furthermore, bands due to aliphatic C−H stretching at about 2900 cm −1 (empty circle) and due to C− O stretching (diamond), typical of carbohydrates, were visible in the region ranging from 1200 to 1100 cm −1 . 53 The PDLLA FT-IR spectrum showed the aliphatic C−H stretching bands (filled circle) at 2995 and 2945 cm −1 , the ester CO stretching (empty square) at 1760 cm −1 , and the C−H 3 bending (filled square) at 1454 cm −1 . 62 The FT-IR spectra of electrospun scaffolds are shown in Figure 2 as dark cyan, magenta, and dark yellow curves.…”

“…50 Herein, an El-derived peptide with a bioactive sequence was added to the polymer mixture. CNCs are generally used to reinforce scaffolds electrospun from different polymers, such aspolyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP), 51 PCL, 52 polyacrylonitrile (PAN), 53 and PLA. 54 In the present study, CNCs were added to counterbalance the strong hydrophobicity of PDLLA and improve the mechanical properties of hybrid scaffolds.…”

Nanofibrous TiO2produced using alternating field electrospinning of titanium alkoxide precursors: crystallization and phase development

“…An AFES apparatus capable of operating at alternating current (AC)-voltages up to 40 kV rms at 60 Hz was used to spin the precursor bers. [41][42][43]45 The Ti(OBu) 4 /polymer precursor solution was delivered at up to 180 mL h À1 ow rate through the base of a shallow dish-like electrode with the diameter varying from 10 to 25 mm ( Fig. 1).…”

Fabrication of dual-functional composite yarns with a nanofibrous envelope using high throughput AC needleless and collectorless electrospinning

“…Our previous work has shown that AC electrospinning combined with an appropriately-shaped, needleless spinning-electrode is highly efficient at generating a dense plume of nanofibers at voltages above 30 kV 20 . Subsequent work has shown that the AC collectorless and needleless electrospinning method has the potential for many applications in biomedicine, textile industry, filtration, environmental sensors and enhanced catalists 21–24 . We have now created a high throughput method for producing composite yarns with a massive nanofibrous envelope.…”