Crystal Structure and Ferroelectric Properties of Poly(vinylidene fluoride)-Carbon nano tube Nanocomposite Film

Lee, Jiseok; Kim, Gwang Ho; Kim, Woo Nyon; Oh, Kwang–Joong; Kim, Hyeong Tae; Hwang, Seung Sang; Hong, Soon Man

doi:10.1080/15421400802330861

Cited by 34 publications

(24 citation statements)

References 10 publications

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“…Therefore, it is expected that adding a small amount of these two fillers into the PVDF matrix resulted in an increase in the

F true(β true)

of the PVDF nanocomposite films. By adding more organic filler contents into the nanocomposite, the

F true(β true)

decreases . This could be attributed to the fact described before that the high density of organic fillers disturbs both the crystallinity procedure and the crystal growth in

β

phase.…”

Section: Resultsmentioning

confidence: 79%

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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“…Therefore, it is expected that adding a small amount of these two fillers into the PVDF matrix resulted in an increase in the

F true(β true)

of the PVDF nanocomposite films. By adding more organic filler contents into the nanocomposite, the

F true(β true)

decreases . This could be attributed to the fact described before that the high density of organic fillers disturbs both the crystallinity procedure and the crystal growth in

β

phase.…”

Section: Resultsmentioning

confidence: 79%

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

et al. 2018

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“…Another type of nanofiller from the class of carbon-based 1D materials is carbon nanotubes, mostly multiwalled carbon nanotubes (MWCNTs; Figure 16.10), which are frequently used in nanocomposites for energy harvesting (Wu et al, 2014;Lee et al, 2008;Sepulveda et al, 2013). In this case, the presence of carbon nanotubes as a nanofiller results in the enhancement of mechanical energy harvesting (Wu et al, 2014) because of the developed b-crystalline structure in the PVDF matrices.…”

Section: Organic Fillersmentioning

confidence: 99%

Fillers in advanced nanocomposites for energy harvesting

Mrlík

Al-Maadeed

2015

Fillers and Reinforcements for Advanced Nanocomposites

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“…Among them, the most common and important one is the mechanical stretching in solution casting method. Besides the methods named herein, addition of various fillers, such as carbon nanotube (CNT) [20][21][22][23][24], graphene [25], Ag nanowires [26], etc., to prepare PVDF homopolymer or copolymer composites represents another practical way to enhance piezoelectricity of PVDF films. Experimental results [20][21][22][23][24][25][26] have shown that the piezoelectricity of PVDF and its copolymers can be remarkably enhanced, e.g., a two-fold increase when adding 0.05 wt% reduced graphene oxide [25].…”

Section: Introductionmentioning

confidence: 99%

Effects of initial crystallization process on piezoelectricity of PVDF-HFP films

Ning²,

et al. 2014

Journal of Polymer Engineering

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The effects of some important factors in the initial crystallization process of the solution casting method on the piezoelectricity of poly(vinylidene fluoride-cohexafluoropropylene) (PVDF-HFP) films were extensively explored. The experimental results revealed that there is an optimal initial crystallization temperature at around 90°C. The slow cooling speed can moderately enhance the degree of crystallinity. The most important finding was that a bilayer crystalline structure caused by an asymmetrical heating pattern can enhance the formation of packed micro-fibrillar morphologies after drawing. These three points can increase the piezoelectricity of the PVDF-HFP films, indicating the increase of the extended-chain crystals ( β-phase).

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Crystal Structure and Ferroelectric Properties of Poly(vinylidene fluoride)-Carbon nano tube Nanocomposite Film

Cited by 34 publications

References 10 publications

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

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

Fillers in advanced nanocomposites for energy harvesting

Effects of initial crystallization process on piezoelectricity of PVDF-HFP films

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