Electrically Conductive Polyaniline-Coated Electrospun Poly(Vinylidene Fluoride) Mats

Merlini, Claudia; Barra, Guilherme Mariz de Oliveira; Ramôa, Sílvia Daniela Araújo da Silva; Contri, Giseli; Almeida, Rosemeire dos Santos; d’Ávila, Marcos Akira; Soares, Bluma G.

doi:10.3389/fmats.2015.00014

Cited by 35 publications

(28 citation statements)

References 24 publications

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“…PANI had two main weight loss steps. The first stage at about 105°C was related to the presence of moisture, and the second one with a weight loss from 277°C up to 390°C was associated to the decomposition of polymer chains . Therefore, it could be concluded that in the NP3 sample, the weight loss below 400°C was related to the degradation of PANI, and at temperatures above 400°C, the observed weight loss could be attributed to the decomposition of both PANI and PA6.…”

Section: Resultsmentioning

confidence: 94%

“…The first stage at about 105°C was related to the presence of moisture, and the second one with a weight loss from 277°C up to 390°C was associated to the decomposition of polymer chains. 13 Therefore, it could be concluded that in the NP3 sample, the weight loss below Abbreviation: PANI, polyaniline.…”

Section: Thermal Gravimetry Analysismentioning

confidence: 99%

“…In addition, Drew et al reported the deposition of the liquid phase of the continuous films of titanium dioxide on the surface of the nanometer‐scale electrospun polymer fibers to obtain improved catalysis, sensing, and photoelectric conversion properties. Merlini et al also fabricated electrically conductive PANI‐coated electrospun poly (vinylidene fluoride) mats via aniline oxidative polymerization on the surface of the nanofibers. In addition, Wang et al dispersed graphene oxide in a poly (vinyl alcohol)–diluted aqueous solution, producing electrospun composite nanofibers.…”

Section: Introductionmentioning

confidence: 99%

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A composite polyaniline/graphene–coated polyamide6 nanofiber mat for electrochemical applications

Tambakoozadeh

Youssefi

Semnani

2019

Polymers for Advanced Techs

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In this study, polyamide6 (PA6) nanofiber mats were fabricated through the electrospinning process. The nanofibers were coated by polyaniline (PANI) using the in situ polymerization of aniline in the presence of graphene oxide. The composite of the PANI/graphene oxide–coated nanofiber mat was treated with hydrazine monohydrate to reduce graphene oxide to graphene, and this was followed by the reoxidation of PANI. Field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), wide angle X‐ray diffraction (WAXD), thermal gravimetric analysis (TGA), tensile strength tests, electrical conductivity measurements, cyclic voltammetry (CV), and charge/discharge measurements were conducted on the composite PA6/graphene nanofiber mats. It was found that the surface of the PA6 nanofibers was coated uniformly with the granular PANI and graphene oxide. Besides, the composite nanofibers showed good tensile and thermal properties. Their electrical conductivity and specific capacitance, when used as a separator in the cell, were 1.02 × 10−4 S/cm and 423.28 F/g, respectively. Therefore, the composite PANI/reduced graphene oxide–coated PA6 nanofiber mats could be regarded as suitable candidates for application in energy storage devices.

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Section: Resultsmentioning

confidence: 94%

Section: Thermal Gravimetry Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A composite polyaniline/graphene–coated polyamide6 nanofiber mat for electrochemical applications

Tambakoozadeh

Youssefi

Semnani

2019

Polymers for Advanced Techs

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“…Incorporating 3% by weight CNTs to PVDF solution increased the tensile modulus and tensile strength by 32 and 28%, respectively . A significant increase in the Young modulus and a decrease in elongation at break are observed with increasing the PANI concentration to PVDF solution . With regards to the effect of LiCl on the β phase formation of PVDF electrospun fibers and its more piezoelectric response, the evaluation of its web modulus is a vital factor.…”

Section: Resultsmentioning

confidence: 99%

Investigation of β phase formation in piezoelectric response of electrospun polyvinylidene fluoride nanofibers: LiCl additive and increasing fibers tension

Mokhtari

Shamshirsaz

Latifi

2015

Polymer Engineering & Sci

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As a piezoelectric polymer, poly (vinylidene fluoride) (PVDF) is attractive in energy conversion applications between electrical and mechanical forms because of its low cost, high flexibility, and biocompatibility. The piezoelectricity of electrospun PVDF polymer is due to changes in the crystalline structure (e.g., creating the β‐phase) during the electrospinning process. This research focuses on two approaches for investigation of β Phase formation: (1) addition of LiCl in different concentrations (0.001, 0.00133, 0.002, 0.004 wt%) as inorganic salt to the polymer solution, (2) increasing tension along the fiber axis by increasing the collector drum speed during the aligning process. Performances of these structures were evaluated by using X‐ray diffraction (XRD), Fourier Transform Infrared (FTIR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). A one‐step nano‐generator and cost‐effective package based on electrospun nanofibers was presented to measure output voltages as a performance factor. Results show that the addition of LiCl leads to β Phase formation in the crystalline structure, decreasing fiber diameter to 65 nm, and increment in the work of rupture and piezoelectric output. Moreover, the results show that increasing collector drum speed causes the alignment of β‐crystallites along the fiber axis and subsequently no considerable effect on the formation of β‐phases and output voltage. POLYM. ENG. SCI., 56:61–70, 2016. © 2015 Society of Plastics Engineers

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“…The preparation procedure for electrospun mats of PVDF/Mt-PPy.DBSA were based on the method described by Merlini et al (2014Merlini et al ( , 2015. Firstly, a determined amount of PVDF was dissolved in DMF by magnetic stirring in a thermostatic bath for 2 h at 70 • C. Once the temperature downs back to 25 • C (room temperature), acetone was added under stirring in order to decrease the viscosity of the solution (proportion of DMF/acetone−3:1 by weight).…”

Section: Preparation Of Electrospun Matsmentioning

confidence: 99%

Comparative Study of the Structure and Properties of Poly(Vinylidene Fluoride)/Montmorillonite-Polypyrrole Nanocomposites Prepared by Electrospinning and Solution Casting

et al. 2019

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In this work, non-woven mats of poly(vinylidene fluoride; PVDF) containing different weight fractions (2.5, 5, 10, and 12.5 wt%) of a nanostructured conductive additive based on montmorillonite-dodecylbenzenesulfonic acid-doped polypyrrole (Mt-PPy.DBSA) have been prepared by electrospinning. The effect of Mt-PPy.DBSA content on the properties of PVDF solution, mats morphology, thermo-mechanical, and electrical properties was investigated. Polymorphism of PVDF/Mt-PPy.DBSA mats was investigated by Fourier Transform Infrared (FTIR) spectroscopy. Moreover, the electromagnetic interference shielding effectiveness (EMI SE) and EMI attenuation mechanism was investigated. In order to perform a comparative study, nanocomposites with the same weight fraction of Mt-PPy.DBSA was also prepared by solution casting. The PVDF/Mt-PPy.DBSA mats display fibers with smaller diameters than neat PVDF, due to the increment in the ionic conductivity of the solution. The incorporation of the Mt-PPy.DBSA additive slightly improved electrical conductivity of the mats and they behave like as an electrically insulating material (10 −14 S cm −1), due to their porosity, that prevents the formation of a conducting network. Furthermore, the EMI SE of electrospun mats is practically null, indicating that they are almost transparent to magnetic waves. On the other hand, nanocomposites fabricated by solution casting display superior electrical conductivity (10 −2 S cm −1) and EMI SE reached values of −5 dB.

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Electrically Conductive Polyaniline-Coated Electrospun Poly(Vinylidene Fluoride) Mats

Cited by 35 publications

References 24 publications

A composite polyaniline/graphene–coated polyamide6 nanofiber mat for electrochemical applications

A composite polyaniline/graphene–coated polyamide6 nanofiber mat for electrochemical applications

Investigation of β phase formation in piezoelectric response of electrospun polyvinylidene fluoride nanofibers: LiCl additive and increasing fibers tension

Comparative Study of the Structure and Properties of Poly(Vinylidene Fluoride)/Montmorillonite-Polypyrrole Nanocomposites Prepared by Electrospinning and Solution Casting

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