Preparation of PVDF-CNT composite

Misiurev, Denis; Ţălu, Ştefan; Dallaev, Rashid; Sobola, Dinara; Goncharova, M. N.

doi:10.1051/e3sconf/202127001012

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…(DMSO, Sigma Aldrich), acetone p.a. (Ac, Sigma Aldrich), acetic acid (AA, Penta, Bratislava, Slovakia), and formic acid (FA, Merck, Darmstadt, Germany) were used for polymers solutions preparation [ 18 , 19 , 20 , 38 , 39 ]. For PVDF solutions, solvents DMSO and Ac were mixed in a volume ratio 7:3.…”

Section: Methodsmentioning

confidence: 99%

Triboelectric Response of Electrospun Stratified PVDF and PA Structures

et al. 2022

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Utilizing the triboelectric effect of the fibrous structure, a very low cost and straightforward sensor or an energy harvester can be obtained. A device of this kind can be flexible and, moreover, it can exhibit a better output performance than a device based on the piezoelectric effect. This study is concerned with comparing the properties of triboelectric devices prepared from polyvinylidene fluoride (PVDF) fibers, polyamide 6 (PA) fibers, and fibrous structures consisting of a combination of these two materials. Four types of fibrous structures were prepared, and then their potential for use in triboelectric devices was tested. Namely, individual fibrous mats of (i) PVDF and (ii) PA fibers, and their combination—(iii) PVDF and PA fibers intertwined together. Finally, the fourth kind was (iv), a stratified three-layer structure, where the middle layer from PVDF and PA intertwined fibers was covered by PVDF fibrous layer on one side and by PA fibrous layer on the opposite side. Dielectric properties were examined and the triboelectric response was investigated in a simple triboelectric nanogenerator (TENG) of individual or combined (i–iv) fibrous structures. The highest triboelectric output voltage was observed for the stratified three-layer structure (the structure of iv type) consisting of PVDF and PA individual and intertwined fibrous layers. This TENG generated 3.5 at peak of amplitude at 6 of excitation frequency and was most sensitive at the excitation signal. The second highest triboelectric response was observed for the individual PVDF fibrous mat, generating 2.8 at peak at the same excitation frequency. The uniqueness of this work lies in the dielectric and triboelectric evaluation of the fibrous structures, where the materials PA and PVDF were electrospun simultaneously with two needles and thus created a fibrous composite. The structures showed a more effective triboelectric response compared to the fibrous structure electrospun by one needle.

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Section: Methodsmentioning

confidence: 99%

Triboelectric Response of Electrospun Stratified PVDF and PA Structures

et al. 2022

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“…There is a specific setting of spinning parameters for each material and its different concentrations in the precursor (as described in Sections 3.1 and 3.2). In the experimental or laboratory spinning process, it is difficult to reduce all causes of undesirable defects, although the production parameters were chosen, emphasizing the quality and high βphase of the fibers [11].…”

Section: Fiber Defectsmentioning

confidence: 99%

Structure Tuning and Electrical Properties of Mixed PVDF and Nylon Nanofibers

et al. 2021

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The paper specifies the electrostatic spinning process of specific polymeric materials, such as polyvinylidene fluoride (PVDF), polyamide-6 (PA6, Nylon-6) and their combination PVDF/PA6. By combining nanofibers from two different materials during the spinning process, new structures with different mechanical, chemical, and physical properties can be created. The materials and their combinations were subjected to several measurements: scanning electron microscopy (SEM) to capture topography; contact angle of the liquid wettability on the sample surface to observe hydrophobicity and hydrophilicity; crystallization events were determined by differential scanning calorimetry (DSC); X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and Fourier-transform infrared spectroscopy (FT-IR) to describe properties and their changes at the chemical level. Furthermore, for the electrical properties of the sample, the dielectric characteristics and the piezoelectric coefficient were measured. The advantage of the addition of co-polymers was to control the properties of PVDF samples and understand the reasons for the changed functionality. The innovation point of this work is the complex analysis of PVDF modification caused by mixing with nylon PA6. Here we emphasize that the application of nylon during the spin influences the properties and structure (polarization, crystallization) of PVDF.

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“…In addition, there are investigations in which other components are used for PVDF samples to improve chemical, mechanical are electrical properties, to increase chemical resistance, elasticity, mechanical strength, conductivity, electrical generated output, etc. Among these components, and their mixtures, are PMMA [18], Zirconia Titanate (PZT) [19], Barium titanate (BaTiO 3 ) [20], cellulose [21], Single and Multiwalled Carbon Nanotubes (SWCNTs-MWCNTs) [20,[22][23][24][25][26], always looking for improving the PVDF polymeric matrix by converting α phase into β phase. It is important to mention that none of these describe in detail the steps followed during preparation of samples, and even less for the preparation of films for use in a testing device.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of PVDF/PMMA Polymer for Sustainable Energy Harvesting

Leppe-Nerey,

Sierra-Espinosa,

Nicho

et al. 2023

J. Solar Eneg. Res. Updat.

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The synthesis of blends that combine properties of two or more polymeric materials is increasingly investigated due to the versatility of the synthesis and its growing potential for many applications, including sustainability. Their characteristics are defined mainly by the synthesis conditions. Therefore, this paper details the synthesis process of easy-to-handle films using mixing method. The procedures and drawbacks found during the preparation of composite films are described. Polymeric compounds formed by the mixture of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA) are addressed, varying the concentration, and evaluating their impact on the piezoelectric capacity. Films were formed through the spin-coating technique and characterized by optical and holographic microscopes. The results showed that composites with a concentration of 50 wt.% or larger of PVDF in the blend acquire a morphology with a granular appearance, however at lower concentrations they present a homogeneous morphology similar to that of PMMA. A homogeneous distribution of PVDF in the PMMA stands out. However, excessive contents of PMMA are associated to peaks and non-uniformities detected like multicolored regions by digital holography. Controlled strength-strain laboratory tests allowed to evaluate the film blends performance. The results indicate noticeable improvements in voltage output for a composition 70wt% PVDF and 30 wt% PMMA.

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Preparation of PVDF-CNT composite

Cited by 4 publications

References 20 publications

Triboelectric Response of Electrospun Stratified PVDF and PA Structures

Triboelectric Response of Electrospun Stratified PVDF and PA Structures

Structure Tuning and Electrical Properties of Mixed PVDF and Nylon Nanofibers

Fabrication of PVDF/PMMA Polymer for Sustainable Energy Harvesting

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