Advances in Electroactive Electrospun Nanofibers

Picciani, Paulo H. S.; Medeiros, Eliton S.; Orts, William J.; Mattoso, L. H. C.

doi:10.5772/23229

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Solution electrospinning and nanocomposite formation are two methods which can enhance the β phase content in the final material and hence improve the piezoelectric response. Application of the electrospinning method will cause tensile forces and polarization in the fibers resulting in maximum β phases and maximum dispersion of NPs and hence preventing from their agglomeration 27,35,36 . Electrospun polymers possess higher nano‐scaled orientation and porosity in comparison with the other film preparation methods 37‐39 .…”

Section: Introductionmentioning

confidence: 99%

Flexible piezoelectric cum‐ electromagnetic ‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles

Samadi

Pourahmad

2020

Int J Energy Res

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Flexibility, protection against harmful electromagnetic (EM) waves, and mimicking movement patterns of human beings are among the most required features of advanced textiles. In this regard, the present study was conducted to investigate the possibility of producing flexible, piezoelectric, and EM-sensitive multifunctional nanofibers. Porous core-shell Fe 3 O 4 @MnO 2 Nanoparticles (NPs) were synthesized and dispersed in poly (vinylidene fluoride) through solution mixing methods in different concentrations. Then, nanofibers were prepared by the electrospinning technique. Extensive characterizations including morphological, structural, piezoelectric response, and EM wave absorbance tests were performed on both synthesized NPs and electrospun mats. The effects of filler content, piezoelectric dimension, and test dynamic condition on the output voltage of the piezoelectric generator were also assessed. FTIR and XRD investigations respectively showed that the β phase content increased up to 10% and 7% in presence of 4% NPs that led to an increase of up to 105% in piezoelectric response (up to 23.5 V). Output voltages increased linearly with slopes of 2.83, 1.92, 0.55, 0.306, and 0.086 by increasing the NP content, frequency, piezoelectric area, force, and thickness, respectively. The results of the study indicated that produced nanofibers can absorb significant EM waves in addition to showing high piezoelectric response.

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Section: Introductionmentioning

confidence: 99%

Flexible piezoelectric cum‐ electromagnetic ‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles

Samadi

Pourahmad

2020

Int J Energy Res

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“…More recently, the development of PANI nanostructures has opened up a new range of potential applications, due to their high surface area, controllable electrical conductivity, and ease of preparation [3] . Several authors are extensively studied the use of PANI nanofibers in the manufacture of electronic devices such as gas sensors, super capacitors and biomedical applications [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives

et al. 2018

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ObstractThe non-isothermal decomposition kinetics of conductive polyaniline (PANI) and its derivatives, poly(o-methoxyaniline) (POMA) and poly(o-ethoxyaniline) (POEA), was investigated by thermogravimetric analysis (TGA), under inert and oxidative atmospheres, using Flynn-Wall-Ozawa's approach to assess the kinetic parameters of the decomposition process. The order of reaction was found to be dependent on the degree of conversion indicating that both the early and the later stages of polymer degradation were next the zero or pseudo zero order kinetics, whereas the intermediate stages follow a first order kinetics. The activation energy was found to be dependent on both the degree of conversion and PANI derivative. Activation energy values vary from 125 to 250 kJ/mol, to decompositions carried out under nitrogen, and 75 to 120 kJ/mol to oxidative atmosphere. Parent PANI presented the best thermal stability and suggesting that thermal stability is also influenced by derivatization and type of atmosphere used.In this work, polyaniline (PANI) and its derivatives, poly(o-metoxyaniline), POMA, and poly(etoxyaniline), POEA, were analyzed by thermogravimetric analysis (TGA) and their kinetics of thermal decomposition was studied by Flynn-Wall-Ozawa's approach to access the kinetics triplet (activation energy, pre-exponential factor and order of reaction) in order to compare the thermal behavior of PANI with its POEA and POMA derivatives.

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“…The electrospinning technique has been employed to fabricate biologically active membranes in many studies reported in the literature . Applications for bioactive electrospun fibers include filtration, cell growth and regeneration in tissue engineering, biosensing, and chembio protective fabrics. , High surface area membranes having fiber diameters on the order of hundreds of nanometers have been prepared by this technique. In a typical electrospinning experiment, the polymer solution is placed in a syringe pump with a needle attached to the end.…”

Section: Introductionmentioning

confidence: 99%

Role of Single-Walled Carbon Nanotubes on Ester Hydrolysis and Topography of Electrospun Bovine Serum Albumin/Poly(vinyl alcohol) Membranes

Ford

Suthiwangcharoen

D’Angelo

et al. 2014

ACS Appl. Mater. Interfaces

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Electrospun membranes were studied for the chemical deactivation of threat agents by means of enzymatic proteins. Protein loading and the surface chemistry of hybrid nanofibers influenced the efficacy by which embedded enzymes could digest the substrate of interest. Bovine serum albumin (BSA), selected as a model protein, was electrospun into biologically active fibers of poly(vinyl alcohol), PVA. Single-walled carbon nanotubes (SWNTs) were blended within these mixtures to promote protein assembly during the process of electrospinning and subsequently the ester hydrolysis of the substrates. The SWNT incorporation was shown to influence the topography of PVA/BSA nanofibers and enzymatic activity against paraoxon, a simulant for organophosphate agents and a phosphorus analogue of p-nitrophenyl acetate (PNA). The esterase activity of BSA against PNA was uncompromised upon its inclusion within nanofibrous membranes because similar amounts of PNA were hydrolyzed by BSA in solution and the electrospun BSA. However, the availability of BSA along the fiber surface was shown to affect the ester hydrolysis of paraoxon. Atomic force microscopy images of nanofibers implicated the surface migration of BSA during the electrospinning of SWNT filled dispersions, especially as greater weight fractions of protein were added to the spinning mixtures. In turn, the PVA/SWNT/BSA nanofibers outperformed the nanotube free PVA/BSA membranes in terms of paraoxon digestion. The results support the development of electrospun polymer nanofiber platforms, modulated by SWNTs for enzyme catalytic applications relevant to soldier protective ensembles.

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Advances in Electroactive Electrospun Nanofibers

Cited by 7 publications

References 7 publications

Flexible piezoelectric cum‐ electromagnetic ‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles

Flexible piezoelectric cum‐ electromagnetic ‐absorbing multifunctional nanocomposites based on electrospun poly (vinylidene fluoride) incorporated with synthesized porous core‐shell nanoparticles

Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives

Role of Single-Walled Carbon Nanotubes on Ester Hydrolysis and Topography of Electrospun Bovine Serum Albumin/Poly(vinyl alcohol) Membranes

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