Single‐wall carbon nanotubes dispersion behavior and its effects on the morphological and mechanical properties of the electrospun nanofibers

Abstract

The dispersion behavior of single‐walled carbon nanotube (SWCNT) has important effects on morphological and mechanical properties of SWCNT composite nanofibers. The relationship of the dispersion conditions with morphological and mechanical characteristics for SWCNT / polyacrylonitrile (PAN) / polyvinylpyrrolidone (PVP) composite nanofibers have been examined. The SEM and TEM analyses of the nanofibers revealed that the deformation in the nanofiber structures increases with increasing concentration of SWCNTs. Tensile results showed that only 2 wt% SWCNT loading to the electrospun composite nanofibers gave rise to 10‐fold and 3‐fold increase in the tensile modulus and tenacity of nanofiber layers, respectively. Essentially, high mechanical properties and uniform morphology of the composite nanofibers were found at SWCNT concentration of ∼2 wt% due to their stable and individual dispersion. POLYM. COMPOS., 33:1951–1959, 2012. © 2012 Society of Plastics Engineers

High thermal conductivity of poly(vinylidene fluoride)/carbon nanotubes nanocomposites achieved by adding polyvinylpyrrolidone

“…Many researchers have shown that PVP can improve the dispersion of CNTs through helical wrapping way [19,20]. It has been already proved that PVP also improves the dispersion of CNTs in polymer matrix, leading to the improvement of mechanical properties as compared with the nanocomposites containing untreated CNTs [21].…”

Fabrication of polyamide 6/carbon nanotubes composite electrospun nanofibers for microwave absorption application

“…1d). However, considerable aggregation and local irregu larities in nanofibers structure by incorporating low concentrations of MWCNT (1-2 wt %) have been also reported by other researchers [22,23].…”

Conductive polyacrylonitrile/polyaniline nanofibers prepared by electrospinning process

“…As described in the litera ture [19], mostly with decreasing the viscosity and increasing the conductivity of the electrospinning (Table 2). These variations can be related to the polymer chain conformation changes in the solution produced due to adding PANi CSA.…”

“…Such conduct ing electrospun nanofibers webs could be useful in The prepared solutions were added to a glass syringe with a needle tip (22G, L = 34 mm and D = 0.7 mm). The feeding rate of the polymer solutions was 0.25 mL/h and electrospinning voltage of 16 kV was applied to the needle, while the distance between the needle tip and the drum collector was chosen at 18 cm and the take up speed was set on 100 RPM [17,18]. The electrospinning of solutions were performed at 22 ± 5°C and constant relative humidity (30-35%).…”

“…The resulting speci mens had a planar dimension of width × gauge length = 1 × 3 cm. Tensile testing was performed using a 10 N load cell at extension rate of 10 mm/min [19]. The mechanical data were acquired with five independent experiments, and all data were displayed as mean val ues and standard deviation.…”