Fabrication and characterization of magnetic nanocomposites by electric fields assisted electrospinning

Abstract

A magnetic and electric fields assisted electrospinning, in which a charged copper ring was placed between the needle and the two paralleled magnets receivers, was presented to produce aligned polyacrylonitrile/graphene/Fe 3 O 4 (PAN/Gr/Fe 3 O 4) magnetic composite nanofibers. Characterizations of the magnetic composite nanofibers were investigated by means of scanning electron microscopy, Fourier transform infrared spectroscopy, high-resistance meter, and other methods. The results showed that Gr and Fe 3 O 4 nanoparticles are suitable additives to improve alignment degree and conductive properties of nanofibers.

A review on electrospun magnetic nanomaterials: methods, properties and applications

“…However, in order to form uniform nanoparticles some materials require pre-treatment. Common examples of pre-treatment include sol-gel treatment of the polymer solution and dispersive pre-treatment of composite nanoparticles, such as ultrasonic dispersion [10][11][12][13] or coating with oleic acid (or grafting with a coupling agent) to prevent undesirable aggregation. [14][15][16][17] 2.1.2 Electrospinning rigs.…”

“…In these cases, the collector is usually a flat plate and the morphology of the fibre mat can be regulated by changing the collection method. 11 2.1.2.1 Uniaxial electrospinning. Uniaxial electrospinning is the most simplistic device design (Fig.…”

“…Again, compared to the more traditional flat plate, other collectors include the drum [37][38][39][40][41] (Fig. 2(g)), parallel roller 11,[42][43][44] (Fig. 2(h)) and slit collector.…”

Mechanism study of highly ordered jets in an improved electrospinning process

“…Most researchers obtained oriented nanofibers from an improved spinning apparatus [13][14][15][16][17][18][19]. There are two ways of improving the collection device to obtain ordered fibers.…”

“…There are two ways of improving the collection device to obtain ordered fibers. One is to use a rotating object as the grounded collector [13,14], the other is the parallel electrode method (PEM) [15][16][17][18][19], which fabricates aligned nanofibers by using static and separated conductive electrodes. When the two collecting electrodes are placed in parallel, the fibers are subjected to electric forces during the falling process, they are straightened and deposited between the collecting electrodes, and finally they are carried between the two electrodes.…”