The effect of clay and of electrospinning on the polymorphism, structure and morphology of poly(vinylidene fluoride)

Neppalli, Ramesh; Wanjale, Santosh D.; Birajdar, Mallinath S.; Causin, Valerio

doi:10.1016/j.eurpolymj.2012.09.023

Cited by 66 publications

(39 citation statements)

References 44 publications

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“…HNT has been proven to act as a nucleating agent for PVDF, which is due to the dipole‐dipole attraction between the oxygen atoms of HNT and C‐H groups of PVDF. Alongside, the hydrogen bonding between hydroxyl groups of HNT and the fluorine atoms of PVDF enhances the formation of β‐phase (TTT conformations) in PVDF .…”

Section: Resultsmentioning

confidence: 99%

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

2018

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Currently, there is considerable research focus on portable, lightweight, shock‐resistant, and inexpensive wearable devices that are ideally powered by harvesting abundant mechanical or vibration energy, making battery or related wiring superfluous. In this study, piezoelectric nanogenerator was electrospun from PANi (polyaniline)/HNT (halloysite nanotube)/PVDF (poly[vinylidene fluoride]) blend nanocomposite. Polymorphism, crystallinity and morphology of the nanogenerator were explored in detail. HNT and PANi acted as a nucleating agent and conductive filler, respectively in PVDF; their synergism helps improve the piezoelectric performance of PVDF. The piezoelectric performance of the nanogenerator patch was studied under various external mechanical stresses, such as pressure, tapping, and impact. A maximum voltage output of approximately 7.2 V was generated by the nanogenerator under impact. The nanogenerator patch attached to human arm exhibited not only excellent piezoelectric response during arm movements, but, also proved to be flexible, highly sensitive and durable. This nanogenerator could possibly be used in wearable piezoelectric energy conversion application for self‐powered devices. POLYM. COMPOS., 40:1663–1675, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

2018

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“…But there has been a tremendous increase in research and commercial attention in this field over the past few decades. Considerable amount of efforts have been invested in research and industrial community to increase the production of nonwoven fabrics for different applications including filters, textile, tissue scaffolds, drug delivery, sensors, and nanocomposite [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A comprehensive electric field analysis of cylinder-type multi-nozzle electrospinning system for mass production of nanofibers

Kim

Lee

Unnithan

et al. 2015

Journal of Industrial and Engineering Chemistry

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“…Depending on the chain conformations (namely trans (T) or gauche (G) linkages), PVDF shows five crystalline phases: non-polar a-phase and E-phase, as well as polar b-phase, d-phase, and c-phase. [26][27][28] When the diameter of polymer fiber materials decreases from micrometers to submicrons or nanometers, there appear several interesting characteristics such as very large surface area to volume ratio, flexibility in surface functionalities, and superior mechanical performance compared to any other known form of the materials. This is mainly due to the superior characteristics of PVDF as a result of the presence of these phases.…”

Section: Introductionmentioning

confidence: 99%

Influence of processing conditions on polymorphic behavior, crystallinity, and morphology of electrospun poly(VInylidene fluoride) nanofibers

Baqeri

Abolhasani

Mozdianfard

et al. 2015

J of Applied Polymer Sci

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The polymorphism and crystallinity of poly(vinylidene fluoride) (PVDF) membranes, made from electrospinning of the PVDF in pure N,N-dimethylformamide (DMF) and DMF/acetone mixture solutions are studied. Influence of the processing and solution parameters such as flow rate, applied voltage, solvent system, and mixture ratio, on nanofiber morphology, total crystallinity, and crystal phase content of the nanofibers are investigated using scanning electron microscopy, wide-angle X-ray scattering, differential scanning calorimetric, and Fourier transform infrared spectroscopy. The results show that solutions of 20% w/w PVDF in two solvent systems of DMF and DMF/acetone (with volume ratios of 3/1 and 1/1) are electrospinnable; however, using DMF/acetone volume ratio of 1/3 led to blockage of the needle and spinning process was stopped. Very high fraction of b-phase (79%-85%) was obtained for investigated nanofiber, while degree of crystallinity increased to 59% which is quite high due to the strong influence of electrospinning on ordering the microstructure. Interestingly, ultrafine fibers with the diameter of 12 and 15 nm were obtained in this work. Uniform and bead free nanofiber was formed when a certain amount of acetone was added in to the electrospinning solution.

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The effect of clay and of electrospinning on the polymorphism, structure and morphology of poly(vinylidene fluoride)

Cited by 66 publications

References 44 publications

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

Durable, efficient, and flexible piezoelectric nanogenerator from electrospun PANi/HNT/PVDF blend nanocomposite

A comprehensive electric field analysis of cylinder-type multi-nozzle electrospinning system for mass production of nanofibers

Influence of processing conditions on polymorphic behavior, crystallinity, and morphology of electrospun poly(VInylidene fluoride) nanofibers

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