Study on Morphology and Characterization of Poly(mphenylene isophtalamide)/Multi-Walled Carbon Nanotubes Composite Nanofibers by Electrospinning

Abstract

Electrospinning technique is the main method of preparing polymer nanofiber simply, directly and continuously at present. In this work, electrospinning blend solution was prepared by in-situ polymerization using acid-modified multi-walled carbon nanotubes (MWNTs), m-phenylenediamine (MPD) and isophthaloyl chloride (IPC). And then composite nanofibers were prepared by electrospinning. MWNTs played an important role in nanofiber's properties. The effects of MWNTs on the morphology and characterization of the MWNTs/PMIA composite nanofibers were investigated. Scanning electron microscopy (SEM), thermal gravimetric analyzer (TGA), and X-ray diffraction (XRD) were utilized to characterize the MWNTs/PMIA nanofibers morphology and properties. The experimental results indicated that the nanofibers diameter decreased and solution dynamic viscosity increased with increasing MWNTs contents. XRD data demonstrated that PMIA composite nanofibers had the same crystal type as the pure PMIA nanofiber, and crystallinity was improved with increasing MWNTs loading. Transmission electron microscopy (TEM) was used to confirm MWNTs aligned along the axis of composite nanofibers.

Synthesis and characterization of spider‐web‐like electrospun mats of meta‐aramid

“…Because the solubility and spinability of meta‐aramid is low, CaCl 2 (by‐product) was not removed from the solution. The presence of a salt can increase the solubility of the polymer and the conductivity of the solution, which increases the ease and stability of the electrospinning process 29, 30…”

Tuning hierarchically aligned structures for high-strength PMIA–MWCNT hybrid nanofibers

“…[9][10][11] Also reported is the preparation of electrospun PMIA nanobers. 12,13 However, these electrospun bers usually show randomly oriented nonwoven structures, and a lack of alignment and stretching leading to a relatively low mechanical strength (<100 MPa), which signicantly limited the practical use of PMIA nanobers. 14 In this communication, we report for the rst time the fabrication of highly aligned electrospun PMIA-multiwalled carbon nanotube (MWCNT) hybrid nanobers with robust mechanical performance.…”