Effects of wet-spinning conditions on structures, mechanical and electrical properties of multi-walled carbon nanotube composite fibers

Jee, Min Ho; Park, Sung Ho; Choi, Jonghyun; Jeong, Young Gyu; Baik, Doo Hyun

doi:10.1007/s12221-012-0443-y

Cited by 14 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I G,0° and I G,90° are the peak intensity of G band as the incident polarization parallel and perpendicular to the axis of the composite fibers. And the values of I G,0° / I G,90° were used to study the orientation degree of MWCNTs in composite fibers . The values of I G,0° / I G,90° (Fig.…”

Section: Resultsmentioning

confidence: 99%

Facile fabrication of PVA composite fibers with high fraction of multiwalled carbon nanotubes by gel spinning

Wei

Lai

Zou

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

Poly(vinyl alcohol) (PVA) composite fibers with high fraction of multiwalled carbon nanotubes (MWCNTs) were prepared by gel spinning process. Here, a modified process was introduced to prepare concentrated PVA/MWCNTs/ DMSO spinning dope, and to attain good dispersion of MWCNTs in the fibers. The final composite fibers were studied by thermogravimetric analyzer (TGA), Fourier transform infrared spectrometer (FTIR), Raman spectroscopy, differential scanning calorimetry (DSC), and WAXD analysis. The total content of MWCNTs in PVA composite fibers, from 5 to 30 wt%, was confirmed by TGA analysis. FTIR and Raman measurements demonstrated the existence of strong hydrogen interaction between MWCNTs and PVA matrix. SEM images of composite fibers showed smooth surface, regular cross-section shape and good dispersion of MWCNTs in the fibers. DSC analysis showed that the crystallinity first increased and then decreased with the increase of MWCNTs contents. It can be concluded that low concentration of MWNCTs can act as nucleation sites for crystallization of PVA component, and large amount of MWCNTs may impede the crystallization of PVA component. The WAXD analysis results indicated that the crystal orientation of the PVA component in PVA composite fibers is almost identical at the same drawn ratio. Polarized Raman analysis indicated a small increase in MWCNTs orientation for the composite fibers. The mechanical properties tests showed that the composite fibers exhibit significant improvement in tensile strength and modulus as compared to the neat PVA fibers. The composite fibers also showed sustained growth in electrical conductivity. POLYM. ENG. SCI., 58:37-45, 2018.

show abstract

Section: Resultsmentioning

confidence: 99%

Facile fabrication of PVA composite fibers with high fraction of multiwalled carbon nanotubes by gel spinning

Wei

Lai

Zou

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…By varying the shear stress induced by the spinneret during fiber spinning, they were able to control the degree of orientation of the nanotubes in the PVA. An increase of nanotube orientation in the fiber direction led to smaller intensity ratios of the graphitic C-C stretching vibration and higher tensile moduli values[50]. Similarly, an enhancement of molecular ordering in the non-crystalline COP and CoPA fibers leads to a significant reduction of the Raman intensity ratios.…”

mentioning

confidence: 94%

“…The good correlation between intensity ratio and macroscopic stiffness confirms that the C-C stretching bands are located on the polymer backbone. Jee et al have used poly(vinyl alcohol) (PVA) filled with carbon nanotubes in a wet-spinning process to demonstrate the effect of material orientation on the polarized Raman intensity ratios of stretching vibrations and the resulting tensile modulus[50]. By varying the shear stress induced by the spinneret during fiber spinning, they were able to control the degree of orientation of the nanotubes in the PVA.…”

mentioning

confidence: 99%

Spectroscopic elucidation of structure-property relations in filaments melt-spun from amorphous polymers

Leal

Best

Rentsch

et al. 2017

European Polymer Journal

View full text Add to dashboard Cite

Melt spinning and drawing of amorphous cyclo-olefin and co-polyamide polymeric materials were performed to develop mono-component continuous filaments. Raman spectroscopy was employed to assess the effect of a static bending deformation on the microstructure of the filaments. Spectra stemming from the fiber regions under tensile and compressive loading do not show any appreciable shift of their vibrational bands as a function of applied strain. The bent filaments manage to redistribute strains without any stretching or buckling of polymer chains associated with peak shifting in the Raman spectrum. The influence of fiber draw ratio on the degree of molecular ordering was demonstrated by means of polarized Raman spectroscopy. An increase in draw ratio leads to a variation of the polarization ratio for spectroscopic bands located along the polymer backbone. We observed a correlation between the polarization ratio of these vibrational bands and the macroscopic tensile modulus of the material.

show abstract

“…Among the many nanofillers, carbon nanotubes (CNTs) are good candidates to reinforce and fabricate conductive nanocomposite films. [7][8][9][10][11] There are four keys to the effective nanocomposite reinforcement using CNTs:…”

Section: Introductionmentioning

confidence: 99%

“…Among the many nanofillers, carbon nanotubes (CNTs) are good candidates to reinforce and fabricate conductive nanocomposite films. 7–11 There are four keys to the effective nanocomposite reinforcement using CNTs: Begin with a pristine structure that has minimum impurities Provide a uniform CNT dispersion Insure an effective interfacial interaction between polymer and CNT Orient the polymer chains along the CNT axis. 12–14 …”

Section: Introductionmentioning

confidence: 99%

Comparing the performance of electrospun and cast nanocomposite film of polyamide-6 reinforced with multi-wall carbon nanotubes

Ghane

Mazinani

Gharehaghaji

2018

Journal of Plastic Film & Sheeting

View full text Add to dashboard Cite

This study aims at fabrication and characterization of two different structures of electrically conductive polyamide 6/multi-wall carbon nanotube nanocomposite films at different multi-wall carbon nanotube concentrations including electrospun nanofibrous and cast films. Morphology, embedded multi-wall carbon nanotubes into nanofiber, thermal behavior, electrical conductivity and wettability of films were characterized. Scanning electron microscopy images depicted that the nanofiber diameter decreased with increased nanofillers. Enhancement of crystallinity, electrical and tensile properties, and simultaneously achieving a low percolation threshold confirmed good nanotube dispersion by employing a polymeric emulsifier, polyvinylpyrrolidone. The electrospun film crystalline content increased 18.5% and the cast ones increased 46.8% at 7 wt.% multi-wall carbon nanotubes loading. The electrospun and cast membrane electrical conductivity increased by 10 and 12 orders of magnitude. These results demonstrated higher values compared to previously reported data for polyamide 6/multi-wall carbon nanotube nanocomposites. The electrospun film Young's modulus

show abstract

Effects of wet-spinning conditions on structures, mechanical and electrical properties of multi-walled carbon nanotube composite fibers

Cited by 14 publications

References 30 publications

Facile fabrication of PVA composite fibers with high fraction of multiwalled carbon nanotubes by gel spinning

Facile fabrication of PVA composite fibers with high fraction of multiwalled carbon nanotubes by gel spinning

Spectroscopic elucidation of structure-property relations in filaments melt-spun from amorphous polymers

Comparing the performance of electrospun and cast nanocomposite film of polyamide-6 reinforced with multi-wall carbon nanotubes

Contact Info

Product

Resources

About