Characterization of PVDF membranes by vibrational spectroscopy

Boccaccio, T; Bottino, A.; Capannelli, G.; Piaggio, P.

doi:10.1016/s0376-7388(02)00407-6

Cited by 416 publications

(273 citation statements)

References 27 publications

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“…The strong band appearing at 794 cm −1 indicates that the TG sequence has the major contribution in this film. This observation is in conformity with the studies reported by Boccaccio et al 44 The CH 2 bending mode appearing at ß1424 cm −1 was present in all the films studied here. The intrinsically weak band located at ß839 cm −1 indicates the presence of T3G sequences.…”

Section: Raman Studiessupporting

confidence: 94%

Structural and Optical Properties of Manganese‐Doped NanocrystallineZinc Oxide/Polyvinylidene Fluoride Flexible Composite Thin Films Deposited by the Sol–Gel Method

et al. 2016

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Mn-doped nanocrystalline ZnO (Mn x Zn 1-x O) was incorporated in the polyvinylidene fluoride thin film for obtaining the free-standing flexible film by the sol-gel technique. The effect of Mn-ZnO loading on the optical and microstructural properties of the Mn-ZnO/polyvinylidene fluoride (PVDF) composite films was studied critically for the as-deposited and the poled samples. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were carried out to study the bonding environment. The XPS spectra recorded for poled samples from the fluorine-terminated surface showed a very strong peak at ß695 eV for F1s arising due to C-F bonds. Raman studies showed the presence of the predominant β phase of PVDF in the sample. Peaks related to ZnO nanocrystals were also observed in the Raman spectra. Photoluminescence spectra indicated a strong emission band at ß2.79 eV in the ultraviolet region arising out of near band edge emission of free excitons. C

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Section: Raman Studiessupporting

confidence: 94%

Structural and Optical Properties of Manganese‐Doped NanocrystallineZinc Oxide/Polyvinylidene Fluoride Flexible Composite Thin Films Deposited by the Sol–Gel Method

et al. 2016

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“…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

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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.

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“…Besides, PVDF is a semi-crystalline polymer, which has different phases of crystallinity named α (form II), β (form I), and γ (form III) [5]. Phases of crystal can be controlled in various ways; such as suitable solvent [6], temperature [7,8], and addition of additive [9,10]. ENR is natural rubber which has undergone the addition of epoxide group in the chains by performic epoxidation [11].…”

Section: -2506mentioning

confidence: 99%

Preparation and Characterization of Epoxidised Natural Rubber (Enr)/Poly (Vinylidene Fluoride) (Pvdf) (Enr/Pvdf) Composite Membrane

Mod

Anuar²,

Othaman³

2016

MJAS

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The focus of this research is to prepare epoxidised natural rubber (ENR)/poly(vinylidene fluoride) (PVDF) (ENR/PVDF) membrane using solution casting method and to characterize the ENR/PVDF membrane using universal tensile machine (UTM) and scanning electron microscope (SEM). Composite membrane of ENR/PVDF was prepared by solution casting technique. The tensile strain increases when ratio of ENR increases in the composite. SEM micrograph shows the compatibility of ENR and PVDF in 40/60 wt% sample but agglomeration of ENR in 60/40 wt% ENR/PVDF sample was observed. The micrograph also shows the existence of pores in the composite membrane which is essential when applying the membrane for separation of gas and waste water treatment.Keywords: composite membrane, epoxidised natural rubber, poly(vinylidene fluoride) Abstrak Fokus kajian ini adalah untuk menyediakan membran getah asli terepoksida (ENR)/ poli (vinilidina fluorida) (PVDF) (ENR/PVDF) menggunakan kaedah penuangan larutan dan untuk mencirikan membran ENR/PVDF menggunakan mesin ujian tensil (UTM) dan mikroskop imbasan elektron (SEM). Membran komposit ENR/PVDF telah disediakan menggunakan teknik penuangan larutan. Rintangan tegangan bertambah apabila ratio ENR bertambah didalam komposit. Mikrograf SEM menunjukkan kesesuaian ENR dan PVDF pada sampel 40/60 wt% tetapi terdapat penggumpalan ENR pada sampel ENR/PVDF 60/40 wt%. Mikrograf juga menunjukkan kehadiran liang pada membran komposit tersebut dimana ianya penting untuk diaplikasikan sebagai membran pemisahan gas dan rawatan air buangan.

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Characterization of PVDF membranes by vibrational spectroscopy

Cited by 416 publications

References 27 publications

Structural and Optical Properties of Manganese‐Doped NanocrystallineZinc Oxide/Polyvinylidene Fluoride Flexible Composite Thin Films Deposited by the Sol–Gel Method

Structural and Optical Properties of Manganese‐Doped NanocrystallineZinc Oxide/Polyvinylidene Fluoride Flexible Composite Thin Films Deposited by the Sol–Gel Method

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

Preparation and Characterization of Epoxidised Natural Rubber (Enr)/Poly (Vinylidene Fluoride) (Pvdf) (Enr/Pvdf) Composite Membrane

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