Effect of MWCNT nanofiller on the dielectric performance of bio-inspired gelatin based nanocomposites

Alam, Rabeya Binta; Ahmad, Md. Hasive; Islam, Muhammad R.

doi:10.1039/d2ra01508k

Cited by 24 publications

(10 citation statements)

References 61 publications

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“…The reason for this can be shown as the effect of the dominant electrode polarization at low frequencies. [23,33] This result is compatible with many studies in the literature. [34][35][36] Furthermore, compared with pure poly(ε-CL-co-EO), it is found that the poly(ε-CL-co-EO)/La composites show higher electrical conductivity at the same frequency.…”

Section: Ac Conductivitysupporting

confidence: 92%

“…This is due to the rapid movement of free charges through the composites. [23,30] At low frequencies, the ε" of composites is mainly due to the conductivity loss. [31] ε" is 0.068 at 100 Hz, 0.015, and 0.010 at 1 kHz and 20 kHz for poly(ε-CL-co-EO).…”

Section: Dielectric Lossmentioning

confidence: 99%

“…The observed imaginary permittivity can be caused by different phenomena such as ionic conduction, interfacial, atomic, dipole, and electronic polarization mechanisms. [23,32] The results are summarized in Table 3.…”

Section: Dielectric Lossmentioning

confidence: 99%

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Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

2022

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The precipitation method was adapted to synthesize the poly(ε-caprolactonecopolymer-ethylene oxide) (ε-CL-co-EO) composite with the salt of lanthanum (La), a rare earth element. This salt was incorporated into the polymer of different weight percentages to study how it affects the thermal and dielectric properties of the polymer. The resulting products were characterized by Fourier Transform Infrared Spectroscopy, X-ray diffractometry (XRD), Scanning electron microscopy (SEM) and thermogravimetric analysis. XRD and SEM data show that the polymer mixes homogeneously with the metal salt. Thermal degradation data show that the thermal stability of composites synthesized with La is lower than that of pure polymer. The dielectric properties and A.C conductivity measurements of the composites were investigated by using impedance analyzer in the frequency range (100 Hz to 20 kHz) at room temperature. The electrical property results of (ε-CL-co-EO)/La composites displayed that dielectric constant (έ), dielectric loss (ε"), tan delta (tan δ) and A.C electrical conductivity (σ ac ) increase with increasing La content. The largest conductivity of (ε-CL-co-EO)/La composite filled with 20 wt% La was 8.80 Â 10 À8 S/cm, which was 162% times pure (ε-CL-co-EO). In addition, impedance (IZI) of composites was evaluated from the dielectric data. This procedure is eco-friendly and easy to handle, which provides a promising route to polymer composites in the application of the conductivity field.

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Section: Ac Conductivitysupporting

confidence: 92%

Section: Dielectric Lossmentioning

confidence: 99%

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Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

2022

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“…Figure iii,iv shows the temperature-dependent dielectric constant and dielectric loss as the frequency for the sample (10 wt %) at various temperatures. In the low frequency region, on increasing the temperature the dielectric constant and loss both are increased it may be due to the induction of space charge by the thermal activation phenomena and formation of dipoles which induced the polarization effect at the electrode–electrolyte interface. , At high frequency the dielectric constant and loss reduced drastically because high field aligned the dipoles and reduced the space charge effect by the fast movement of ions through the electrolyte–electrode interface. − When the temperature rises, the ion-pair dissociation process increases as well as the free carrier density at the interface increases. We know that the conductivity is highly influenced by temperature; hence, dielectric loss increases as the temperature increases.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

et al. 2022

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New polymer blend composite electrolytes (PBCEs) were prepared by the solution casting technique using poly(vinyl alcohol) (PVA)-polyethylene glycol (PEG), sodium nitrate (NaNO3) as a doping salt and multiwalled carbon nanotubes (MWCNTs) as fillers. The X-ray diffraction pattern confirms the structural properties of the polymer blend composite films. FTIR investigations were carried out to understand the chemical properties and their band assignments. The ionic conductivity of the 10 wt % MWCNTs incorporated PVA-PEG polymer blend was measured as 4.32 × 10–6 S cm–1 at 20 °C and increased to 2.253 × 10–4 S/cm at 100 °C. The dependence of its conductivity on temperature suggests Arrhenius behavior. The equivalent circuit models that represent the R s(Q1(R1(Q2(R2(CR3))))) were used to interpret EIS data. The dielectric behavior of the samples was investigated by utilizing their AC conductance spectra, dielectric permittivity, dielectric constant (εi and εr), electric modulus (Mi and Mr), and loss tangent tan δ. The dielectric permittivity of the samples increases due to electrode polarization effects in low frequency region. The loss tangent’s maxima shift with increasing temperature; hence, the peak height rises in the high frequency region. MWCNTs-based polymer blend composite electrolytes show an enhanced electrochemical stability window (4.0 V), better transference number (0.968), and improved ionic conductivity for use in energy storage device applications.

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“…In this respect, the Maxwell-Wagner-Sillars (MWS) effect defined as the charge accumulation produced at the conductor-insulator interface is principally used in literature to explain the noticeable rise of ε 0 (ω) found in this type of carbon-based polymer composites at low frequencies [35]. On the contrary, the charge stored at the conductor-insulator interface is not able to respond to the electric field as the frequency rises, resulting in the decrease of ε 0 (ω) at higher frequencies (Figure 5a) [36]. On the other hand, the ε″(ω)(Figure 5b)is frequency independent with an increase from 5 Â 10 À3 for PP to 1.29 for PP/CNF 2 wt.…”

Section: Dielectric Permittivitymentioning

confidence: 99%

Electrical Properties of Polypropylene-Based Composites Melt-Processed with As-Grown Carbon Nanofibers

Paleo¹,

Samir²,

Aribou³

et al. 2024

Conductivity and Thermoplastic Elastomer Properties of Polypropylene Materials

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Electrical conductivity, dielectric permittivity, electrical modulus, and electrical impedance of polypropylene (PP) composites melt-processed with different contents of as-grown carbon nanofibers (CNFs) are studied. As expected, the electrical conductivity of PP/CNF composites increased as the incorporation of CNFs is raised in the polymer, yielding a maximum of ∼ 6 ×10−6 S m−1 for PP/CNF 3 wt. % composites. That enhancement relates to a gradual improvement of the dielectric permittivity as the incorporation of CNFs rises into the PP up to a maximum of ∼ 13 for PP/CNF 3 wt. % composites at 1MHz, which is attributed to the rise of the interface polarization effect. Moreover, the Cole-Cole model is used through the electrical modulus to analyze the effect of CNF contents on the dielectric relaxation of PP/CNF composites from which is deduced that the incorporation of CNFs increases their heterogeneity and relaxation times. The analysis gathered here aims at contributing to the understanding of the electric features of polymer composites filled with a type of CNFs, which are not subjected to any thermal post-processing method after their synthesis by chemical vapor deposition (CVD).

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Effect of MWCNT nanofiller on the dielectric performance of bio-inspired gelatin based nanocomposites

Abstract: Significant improvement in the dielectric performance of the bio-derived gelatin-based polymer nanocomposites has been observed due to the incorporation of MWCNT nanofiller.

Cited by 24 publications

References 61 publications

Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

Improving dielectric properties, electrical conductivity, and thermal properties of biodegradable polymer composites prepared with lanthanum

Enhancement of Electrochemical Stability Window and Electrical Properties of CNT-Based PVA–PEG Polymer Blend Composites

Electrical Properties of Polypropylene-Based Composites Melt-Processed with As-Grown Carbon Nanofibers

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