Polyurethane/multiwalled carbon nanotube nanowebs prepared by an electrospinning process

Abstract

Polyurethane (PU) and PU/multiwalled carbon nanotube (MWCNT) nanocomposite nanofibers, both with diameters of 350 nm, were prepared by an electrospinning process from PU dimethylformamide solutions. The appearance of nanowebs in PU/MWCNT nanofiber structures containing PU fibers with diameters of 20-40 nm was observed. The existence of these structures could have been based on the occurrence of strong secondary electric fields, which were created between individual conducting MWCNTs (distributed in the PU/MWCNT nanocomposites), which started to behave as the local moving nanoelectrodes promoting the creation of additional very fine nanowebs during the electrospinning processes. To our knowledge, this is the first report describing nanowebs from synthetic polymers prepared by an electrospinning process.

Stress-strain Hysteresis of a Carbon Nanotube Network as Polymer Nanocomposite Filler under Cyclic Deformation

“…For making entangled MWCNT network on a polyurethane porous membrane [9], a vacuum filtration method was used. The formed disk-shaped network was washed several times by deionized water and methanol in situ, then removed and dried between filter papers.…”

Compressive stress-electrical conductivity characteristics of multiwall carbon nanotube networks

“…For making an entangled MWCNT network on a polyurethane porous membrane [10], a vacuum filtration method was used. The formed disk-shaped network was washed several times by deionized water and methanol in situ, then peeled off from the membrane and dried between filtering papers.…”

Effect of compressive strain on electric resistance of multi-wall carbon nanotube networks

“…For more details of PU chemical composition and particular process characteristics, see reference [7]. To make entangled MWNT network on PU porous filtration membrane, the vacuum filtration method was used.…”