Flexible electrospun polyvinylidene fluoride nanofibrous composites with high electrical conductivity and good mechanical properties by employing ultrasonication induced dispersion of multi-walled carbon nanotubes

Zha, Jun‐Wei; Gao, Yang; Zhang, Dongli; Wen, Yongqiang; Li, Robert K.Y.; Shi, Chen; Dang, Zhi‐Min

doi:10.1016/j.compscitech.2016.04.002

Cited by 24 publications

(6 citation statements)

References 31 publications

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“…Calendering requires the premixing of the filler and the matrix to form a paste. In the melt mixing method, high shear stress results in defects or a decrease in the aspect ratio of the fillers [18][19][20][21]. Ball milling results in little agglomeration of the filler material, however the proper optimization of the process parameters may result in the uniform distribution of the fillers in the matrix and less time for mixing which makes it an industrially viable process [18].…”

Section: Introductionmentioning

confidence: 99%

High electromagnetic interference shielding of poly(ether-sulfone)/multi-walled carbon nanotube nanocomposites fabricated by an eco-friendly route

Verma¹,

Rathod²,

Goyal

2020

Nanotechnology

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High-performance polymer matrix nanocomposites based on poly(ether-sulfone) (PES) matrix reinforced with multi-walled carbon nanotubes (MWCNTs) were fabricated using planetary ball mill followed by hot pressing. Their electrical properties and the electromagnetic interference shielding effectiveness (EMI-SE) were investigated and discussed. A percolation threshold of about 0.65 vol% MWCNT was obtained. The electrical conductivity was increased by more than ten orders of magnitude at the percolation threshold and to approximately 0.01 S cm −1 at 6.67 vol% (or 10 wt%) MWCNT. This is a significant improvement. The highest EMI-SE of about 29-30 dB (both in the X-band and K u -band) was obtained for the 6.67 vol% MWCNT filled nanocomposites with a thickness of 0.9 mm. The specific EMI-SE of these nanocomposites were found to be higher than the literature values. The thermal stability and the char yield (measured at 900 • C) of the nanocomposites were found to be more than 470 • C and 40.6%, respectively.

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Section: Introductionmentioning

confidence: 99%

High electromagnetic interference shielding of poly(ether-sulfone)/multi-walled carbon nanotube nanocomposites fabricated by an eco-friendly route

Verma¹,

Rathod²,

Goyal

2020

Nanotechnology

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“…It is a good strategy for suppressing the crystallinity and enhancing the ionic conductivity. It not only leads to an increase on ionic conductivity, but also improves its mechanical strength [17][18][19][20][21][22]. The effects of TiO 2 on the ionic conductivity of PEO-LiClO 4 polymer electrolyte were studied, showing that ionic conductivity greatly enhanced due to the Li + ions can easily transfer between the polymer chains [23].…”

Section: Introductionmentioning

confidence: 99%

Electrospun poly(ethylene oxide) nanofibrous composites with enhanced ionic conductivity as flexible solid polymer electrolytes

Zha

Huang

et al. 2017

High Voltage

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Solid polymer electrolytes (SPEs) have great potential to address the safety issues of lithium (Li)-ion batteries when compared with conventional liquid electrolytes, which makes them a promising alternative for next-generation high-energy batteries. In this work, poly(ethylene oxide)-lithium perchlorate (PEO-LiClO 4) polymer electrolytes for Li-ion batteries were prepared using electrospinning. The crystallinity, ionic conductivity as well as mechanical properties were investigated. Ionic conductivities and mechanical properties of PEO-LiClO 4 based SPE have been obviously increased by incorporating modified TiO 2 nanofibres (TNFs) than TiO 2 nanoparticles (TNPs), due to that both TNFs and TNPs can decrease the crystalline phase concentration of PEO and increase segmental flexibility of PEO. The SPE with 3 wt% TNFs exhibits the highest conductivity of 5.308 × 10 −5 S cm −1 at 20°C and higher tensile strength of 13.8 MPa. These results highlight the potential of utilising the electrospinning method to improve the ionic conductivity of SPEs. 2 Experimental section 2.1 Materials PEO with molecular weight of 6.0 × 10 5 was purchased from Aladdin Industrial Corporation. LiClO 4 with purity of 99.9% and anatase TiO 2 powder with diameter of 5-10 nm were also bought from Aladdin Industrial Corporation. Prior to use, PEO, LiClO 4 and TiO 2 were vacuum dried for 24 h at 50, 120 and 120°C, respectively. Tetra-n-butyl titanate (TNBT, purity > 98.5%) was purchased from Sinopharm Chemical Reagent CO., Ltd.

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“…For example, Young's modulus reached to 4, 6, and 10 MPa for 1.6 wt% GO, HNT, and Gr samples, respectively, which were approximately 8, 12, and 20 times greater than pristine PVDF nanofiber membrane. These nanofillers acted as a reinforcing filler which transfer stress between polymer matrix and nanofiller interface …”

Section: Resultsmentioning

confidence: 99%

Improving piezoelectric and pyroelectric properties of electrospun PVDF nanofibers using nanofillers for energy harvesting application

Abbasipour

Khajavi

Yousefi

et al. 2018

Polymers for Advanced Techs

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In this study, it was aimed to increase the piezoelectric and pyroelectric properties of electrospun polyvinylidene fluoride (PVDF) nanofibers simultaneously by using specific nanofillers. Graphene oxide (GO), graphene, and halloysite nanotubes with different concentrations (0, 0.05, 0.4, and 1.6% wt/wt) were combined with PVDF solution and were fabricated in the form of nanofibers through electrospinning. Pyroelectric properties of samples were measured by submerging sealed samples in hot water (360°K) and ice (270°K). The piezoelectric properties of the samples were evaluated through bending tests. The microstructural, mechanical, and thermal properties of the electrospun PVDF nanocomposite were investigated using scanning electron microscope, Instron instrument, and thermogravimetric analysis, respectively. To further support the experimental observations for generating electric voltage in the bended nanogenerator, the PVDF nanogenerator (PNG) was also modeled by a finite element analysis based on the theory of linear piezoelectricity using COMSOL Multiphysics simulation software. Experimental results showed that adding nanofillers could improve the piezoelectric and pyroelectric properties of all samples, associated with the increment of β-phase in the nanofibers. It was concluded that adding nanofillers could increase pyroelectricity about 50% more than piezoelectricity in pristine PVDF nanofiber web. The PNG containing 1.6 wt% GO showed the highest efficiency in terms of piezoelectricity and pyroelectricity. In addition, the results showed that the ratio of piezoelectric to pyroelectric coefficients was constant (~1.5) and it was independent of the nanofiller type and content. The effect of external force and vibration frequency on the output voltage was also investigated. Increasing the compressive force and vibration frequency caused a greater output voltage. Finally, the fabricated nanogenerator was integrated on insole and elbow to investigate its energy harvesting capabilities from body movement.

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Flexible electrospun polyvinylidene fluoride nanofibrous composites with high electrical conductivity and good mechanical properties by employing ultrasonication induced dispersion of multi-walled carbon nanotubes

Cited by 24 publications

References 31 publications

High electromagnetic interference shielding of poly(ether-sulfone)/multi-walled carbon nanotube nanocomposites fabricated by an eco-friendly route

High electromagnetic interference shielding of poly(ether-sulfone)/multi-walled carbon nanotube nanocomposites fabricated by an eco-friendly route

Electrospun poly(ethylene oxide) nanofibrous composites with enhanced ionic conductivity as flexible solid polymer electrolytes

Improving piezoelectric and pyroelectric properties of electrospun PVDF nanofibers using nanofillers for energy harvesting application

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