Vibrational spectrum of PVDF and its interpretation

Bormashenko, Yelena; Pogreb, Roman; Stanevsky, Oleg; Bormashenko, Edward

doi:10.1016/j.polymertesting.2004.04.001

Cited by 410 publications

(256 citation statements)

References 11 publications

Supporting

Mentioning

244

Contrasting

Unclassified

Order By: Relevance

“…The observed red-shift in D-bond from 2600 cm in PVDF/G electrospun nanocomposite film and also decreasing of its intensity, both indicating that G flakes exfoliated in PVDF polymer matrix which provides their good integration with polymer chains in the prepared electrospun films [37]. The intercalation of G layers that is schematically shown in Figure 8a improves its exfoliation and dispersion in the polymer solution and enriches as depicted in Figure 8b.…”

Section: Spectroscopic Analyses Resultsmentioning

confidence: 89%

“…In the case of PVDF film, three strong peaks at about 850, 1400 and 1200 cm −1 were observed. The former two peaks were due to the C-F stretching vibration, and the latter one was due to the C-C bond of PVDF and the two weak bands appeared at 510 and 486 cm −1 were assigned to the CF2 bending vibration [37,38]. For PVDF/G composite film, G affects the infrared absorption spectra with the appearance of absorption peaks at about 1700, 2000 and 3000 cm show the existence of C-O bond, which is related to the bonds on the surface of G flakes.…”

Section: Spectroscopic Analyses Resultsmentioning

confidence: 99%

“…Simultaneous presence of the nano and micro fibers is one of the novel properties of the synthesized PVDF/G films that promotes the film properties in some aspects of porosity, hydrophobicity, etc. [33][34][35][36][37].…”

Section: Morphology and Crystallographic Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and Characterization of Polyvinylidene Fluoride/Graphene Superhydrophobic Fibrous Films

Karimi-Sabet²,

et al. 2015

View full text Add to dashboard Cite

Abstract:A new strategy to induce superhydrophobicity via introducing hierarchical structure into the polyvinylidene fluoride (PVDF) film was explored in this study. For this purpose nanofibrous composite films were prepared by electrospinning of PVDF and PVDF/graphene blend solution as the main precursors to produce a net-like structure. Various spectroscopy and microscopy methods in combination with crystallographic and wettability tests were used to evaluate the characteristics of the synthesized films. Mechanical properties have been studied using a universal stress-strain test. The results show that the properties of the PVDF nanofibrous film are improved by compositing with graphene. The incorporation of graphene flakes into the fibrous polymer matrix changes the morphology, enhances the surface roughness, and improves the hydrophobicity by inducing a morphological hierarchy. Superhydrophobicity with the water contact angle of about 160° can be achieved for the PVDF/graphene electrospun nanocomposite film in comparison to PVDF pristine film.

show abstract

Section: Spectroscopic Analyses Resultsmentioning

confidence: 89%

Section: Spectroscopic Analyses Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and Characterization of Polyvinylidene Fluoride/Graphene Superhydrophobic Fibrous Films

Karimi-Sabet²,

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The absorbencies at 614 cm −1 , 760 cm −1 , 795 cm −1 , 853 cm −1 , 974 cm −1 , 1071 cm −1 , and 1172 cm −1 correspond to α-PVDF and the absorbencies at 879 cm −1 and 838 cm −1 correspond to β-PVDF. [19][20][21] The relative amount of β-phase obtained from the formula F(β) = A β /(1.26A α + A β ) are 0.388 and 0.462 in pure PVDF and composite, respectively. A β is the absorbance at 838 cm −1 and A β is the absorbance at 760 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film

Thirmal¹,

Nayek²,

Murugavel³

et al. 2013

AIP Advances

View full text Add to dashboard Cite

We have investigated the structure, magnetic and dielectric properties of PVDFLa 0.7 Sr 0.3 MnO 3 polymer nanocomposite thick film fabricated by dip coating technique along with the magnetodielectric effect. The structure and dielectric properties show the enhanced β phase in the composite compared to the PVDF film. The coupling between the ferroelectric and magnetic phases in the composite is revealed in the form of dielectric anomaly at the ferromagnetic Curie temperature. We observed 1.9% magnetodielectric effect at 300 K with the possibility of enhanced effect near the transition temperature. In addition, the analysis of the electric modulus indicates that the composite exhibits interfacial related relaxation and it follows Arrhenius Law. Our study suggests that the ac conductivity of the PVDF-La 0.

show abstract

“…FTIR spectrum of PVDF exhibited α-phase peaks located at 531, 614, 763, 796, 870 and 970 cm −1 . The β-phase PVDF characteristic peaks located at 440, 470, 510, 840 and 1280 cm −1 [31]. It has been revealed that the film has weaker β-phase crystalline than the electrospun PVDF fibers.…”

Section: Ftir Analysismentioning

confidence: 97%

Untitled

2017

JTEFT

View full text Add to dashboard Cite

Poly Vinylidene Fluoride (PVDF) because of its piezoelectric properties has been applied in different applications such as smart textiles, medical application and membranes for energy harvesting. It was declared that nanofibres diameters and electrospinning parameters could be enhanced the piezoelectric properties of these materials. The main objective of this paper is applying the Genetic Algorithm (GA) to determine the optimum condition of solution parameters and processing conditions based on the desired diameter size of PVDF fibers to produce the fibers without any structural faults. In this method, The Fitness function was determined by a simple analytical model presented by Fridrikh. Toward approving the GA results the experimental tests were done. the effect of four parameters such as flow rate of the polymer solution, electrospinning voltage, electrospinning distance and polymer concentration on the fiber formation and fiber diameter size of electrospun PVDF fibers have been explored by Scanning Electron Microscopy (SEM) to attest the accuracy of the model. Assessment of experimental and theoretical results show that electrospinning parameters determined by GA method leads to achieve desire fiber diameters. Because of time and energy consuming of electrospinning process, the GA method may be useful to achieve desired fiber diameter by determining electrospinning parameters for polymers prior to fiber production.

show abstract

Vibrational spectrum of PVDF and its interpretation

Cited by 410 publications

References 11 publications

Preparation and Characterization of Polyvinylidene Fluoride/Graphene Superhydrophobic Fibrous Films

Preparation and Characterization of Polyvinylidene Fluoride/Graphene Superhydrophobic Fibrous Films

Magnetic, dielectric and magnetodielectric properties of PVDF-La0.7Sr0.3MnO3 polymer nanocomposite film

Untitled

Contact Info

Product

Resources

About