Enhanced optical properties, thermal transitions, temperature-dependent electrical properties and modelling studies of poly(diphenylamine)/NiO nanocomposites

Furhan,; Vyshakh, K; Ramesan, M. T.

doi:10.1007/s10853-022-07759-8

Cited by 12 publications

(2 citation statements)

References 70 publications

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“…The fast‐moving thermally activated polar groups (charge carriers) that may readily adapt to fluctuating external fields are the cause of this tendency. [ 36 ] This eventually contributes to polarization and thus increases the dielectric constant. At low temperatures, they may not be able to align in the applied field due to the lack of energy required to do so.…”

Section: Resultsmentioning

confidence: 99%

Development of high‐performance biopolymer nanocomposites derived from carboxymethyl chitosan/boehmite via green synthesis

Meera

Ramesan

2022

Polymer Composites

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In this work, biopolymer nanocomposites derived from carboxymethyl chitosan (CMCS) and boehmite were prepared via an environmentally friendly technique and their structural, morphological, thermal, electrical, dielectric, and mechanical properties were investigated. The successful fabrication of carboxymethyl chitosan/boehmite nanocomposites was evident from the appearance of characteristic peaks of boehmite in FTIR and alteration in the morphology as revealed by optical and SEM micrographs. The glass transition temperature (T g ) and melting temperature (T m ) were increased as the filler content increased. The enhanced thermal stability of nanocomposites was clear from thermogravimetric results. The incorporation of boehmite nanoparticles into CMCS improved the conductivity to a semiconducting range. The dielectric constant of CMCS/boehmite nanocomposites was significantly higher compared to pure CMCS. The influence of temperature on AC conductivity, activation energy, dielectric constant and loss tangent were analyzed. Complex impedance analysis carried out by Nyquist plots and the bulk resistance showed a decreasing trend with temperature, which indicated enhanced conductivity with temperature. Tensile strength and hardness were observed to be increased with boehmite inclusion, whereas elongation at break is reduced. As a result, eco-friendly CMCS/boehmite biopolymer nanocomposites with good thermal, mechanical, electric, and dielectric properties may be a potential green alternative for flexible electronic, charge storage, and other electrochemical devices.

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Section: Resultsmentioning

confidence: 99%

Development of high‐performance biopolymer nanocomposites derived from carboxymethyl chitosan/boehmite via green synthesis

Meera

Ramesan

2022

Polymer Composites

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“…The change in AC conductivity versus frequencies at room temperature for PMMA composites with different weight percentages of PIN is depicted in figure 9. It is clear that conductivity increases with frequency for all samples, indicating the presence of a hopping mechanism [35]. The poor conductivity at lower frequencies is contributed to insulating grain boundaries, whereas the enhanced conductivity at higher frequencies is attributed to conducting grains.…”

Section: Ac Conductivitymentioning

confidence: 86%

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

et al. 2023

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This study encompasses the synthesis, characterization, optical properties, thermal, mechanical, and electrical characteristics of a series of in situ polymerized poly (methyl methacrylate) (PMMA) with different contents of polyindole (PIN) composites. The formation of composites was characterized by FTIR, UV-visible, XRD, FE-SEM, AFM, DSC and TGA. Tensile testing techniques was used to determine mechanical properties such as tensile strength, modulus, hardness and impact strength of PMMA/PIN. Impedance spectroscopy was used to study the electrical properties of the prepared composites. The interaction between the NH moiety of indole and ester groups of PMMA was established through FTIR. The optical bandgap energy determined from UV spectroscopy shows a declining trend, whereas the refractive index grows significantly with the loading of indole up to 5 wt%. The decrease in broadness and intensity of the XRD peak confirmed the presence of an indole component in the PMMA matrix. The holes in the surface morphology of PMMA was changed into uniformly dispersed particles, confirming the dispersion of PIN in the PMMA matrix. The surface roughness obtained from AFM increases with the addition of PIN to PMMA. DSC measurements show that the glass transition temperature of the polymer increases with the inclusion of the indole moiety. TGA indicates that the addition of PIN has a positive effect on the thermal stability of PMMA/PIN composites. The results of mechanical testing showed an increase in Youngs modulus, tensile strength, and impact strength with the addition of PIN. The AC impedance results show an increase in the dielectric constant and conductivity of PMMA with the PIN addition. The PMMA/PIN composites with high tensile strength, conductivity and dielectric constant can be used in the fabrication of optoelectronic devices and EMI shielding.

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Evidential Studies of Structural, Morphological and Optoelectrical Behaviour of Inverse Spinel CoFe2O4/MWCNTs@CMC Nanocomposites

Mohan,

Sagar,

Yashaswini

et al. 2024

J Inorg Organomet Polym

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Enhanced optical properties, thermal transitions, temperature-dependent electrical properties and modelling studies of poly(diphenylamine)/NiO nanocomposites

Cited by 12 publications

References 70 publications

Development of high‐performance biopolymer nanocomposites derived from carboxymethyl chitosan/boehmite via green synthesis

Development of high‐performance biopolymer nanocomposites derived from carboxymethyl chitosan/boehmite via green synthesis

Improvement in structural, thermal, charge transport and mechanical properties of poly (methyl methacrylate)/polyindole composites for optoelectronic devices

Evidential Studies of Structural, Morphological and Optoelectrical Behaviour of Inverse Spinel CoFe2O4/MWCNTs@CMC Nanocomposites

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