Influence of solvent evaporation rate on crystallization of poly(vinylidene fluoride) thin films

Pramod, K.; Gangineni, R. B.

doi:10.1007/s12034-015-0894-z

Cited by 30 publications

(25 citation statements)

References 19 publications

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“…Along with spin-coating, the solvent evaporation method is considered one of the simplest methods to fabricate PVDF thin films, where the desired film is cast on a substrate with subsequent evaporation of the solvent [ 47 , 48 ]. Diani et al fabricated PVDF film with a high porosity, which resulted in improved ionic conductivity of the material.…”

Section: Piezoelectric Pvdfmentioning

confidence: 99%

A Review of Piezoelectric PVDF Film by Electrospinning and Its Applications

Kalimuldina

Turdakyn

Abay

et al. 2020

Sensors

235

124

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With the increase of interest in the application of piezoelectric polyvinylidene fluoride (PVDF) in nanogenerators (NGs), sensors, and microdevices, the most efficient and suitable methods of their synthesis are being pursued. Electrospinning is an effective method to prepare higher content β-phase PVDF nanofiber films without additional high voltage poling or mechanical stretching, and thus, it is considered an economically viable and relatively simple method. This work discusses the parameters affecting the preparation of the desired phase of the PVDF film with a higher electrical output. The design and selection of optimum preparation conditions such as solution concentration, solvents, the molecular weight of PVDF, and others lead to electrical properties and performance enhancement in the NG, sensor, and other applications. Additionally, the effect of the nanoparticle additives that showed efficient improvements in the PVDF films was discussed as well. For instance, additives of BaTiO3, carbon nanotubes, graphene, nanoclays, and others are summarized to show their contributions to the higher piezo response in the electrospun PVDF. The recently reported applications of electrospun PVDF films are also analyzed in this review paper.

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Section: Piezoelectric Pvdfmentioning

confidence: 99%

A Review of Piezoelectric PVDF Film by Electrospinning and Its Applications

Kalimuldina

Turdakyn

Abay

et al. 2020

Sensors

235

124

View full text Add to dashboard Cite

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“…Degree of crystallinity is defined as the fractional amount of polymer that is crystalline , and can be observed by using the XRD pattern of the fabricated layers. The degree of crystallinity can be calculated as the fraction of the area of crystalline peaks (sharp peaks) to the area of all peaks (crystalline and amorphous peaks) . The XRD pattern of fabricated electrolyte and electrode layers in 10PVDF40 are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Degree of Crystallinity and Phase Fraction of Polyvinylidene Fluoride Nanocomposites Containing Ionic Liquid and Graphene/Carbon Nanotube

et al. 2018

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Bucky gel actuator (BGA) is a type of electro‐active polymer that bends when stimulated by an electric field. Its operation is affected by a matrix network, which has two opposite effects on ion migration and material strength properties of the actuator. Therefore, designing a BGA with more deflection or more strength demands the study of matrix structural properties. In this paper, polyvinylidene fluoride (PVDF) was used as the polymer matrix in BGA composites, and the degree of crystallinity and the fraction of β phase were calculated using X‐ray diffraction and Fourier Transform Infrared spectroscopy respectively to investigate the matrix structural properties. Furthermore, Raman spectroscopy analysis was utilized for phase characterization. Several composite films with various components including electrode and electrolyte layers of BGA were prepared by the drop‐casting method in two different conditions to study the effects of PVDF concentration in dimethylacetamide solvent, drying temperature, and additive materials on the matrix structural properties for the first time. It was observed that low concentrations of PVDF in dimethylacetamide solvent coupled with a high drying temperature in a carbon nanotube‐based BGA in contrast with using a graphene‐based BGA, had the lowest degree of crystallinity and β phase fraction. POLYM. COMPOS., 39:E1208–E1215, 2018. © 2018 Society of Plastics Engineers

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“…The ratio of crystalline content to amorphous content is known as polymer crystallinity [15]. It determines polymer properties, such as hardness, stiffness, melting point and electroactive properties [18].…”

Section: Degree Of Crystallinitymentioning

confidence: 99%

“…By deconvoluting the PVDF XRD pattern, the crystalline phases are given by sharp peaks, while the amorphous phases are given by broader peaks. The degree of crystallinity is calculated by dividing the area of crystalline peaks by the summation of the crystalline and non-crystalline peak areas [15]. The XRD patterns of all fabricated PVDF films are compared in figures 2 and 3.…”

Section: Degree Of Crystallinitymentioning

confidence: 99%

“…For example, by using solution-casting method, different phases can be achieved by adjusting the drying temperature, type of solvent, solution concentration, ambient conditions, solvent evaporation rate and mechanical condition (e.g. stretching PVDF sample in one or two directions) [7,[11][12][13][14][15]. Also, poling, spin coating, electro-spinning and use of additives like clay result in the polar β phase of PVDF [16].…”

Section: Introductionmentioning

confidence: 99%

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Effects of static electricity and fabrication parameters on PVDF film properties

et al. 2018

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Degree of crystallinity and β-phase fraction are important factors in determining electroactive polymers performance. In the present work, effects of intrinsic static electricity, substrate type, PVDF solution concentration and drying temperature on β-phase fraction and degree of crystallinity in fabricated PVDF films were studied using XRD, Raman spectroscopy and FTIR techniques. In particular, this paper investigates the influence of static electricity on PVDF film properties for the first time. The results show that discharging static electricity from the PVDF solution is highly effective in reducing the amount of residual solvent. It was found that a lower amount of residual solvent and higher drying temperature resulted in a higher degree of crystallinity. Further, a high fraction of β phase was observed in all PVDF films due to more polar solvent effect that it was hardly affected by other parameters such as static electricity.

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Influence of solvent evaporation rate on crystallization of poly(vinylidene fluoride) thin films

Cited by 30 publications

References 19 publications

A Review of Piezoelectric PVDF Film by Electrospinning and Its Applications

A Review of Piezoelectric PVDF Film by Electrospinning and Its Applications

Degree of Crystallinity and Phase Fraction of Polyvinylidene Fluoride Nanocomposites Containing Ionic Liquid and Graphene/Carbon Nanotube

Effects of static electricity and fabrication parameters on PVDF film properties

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