Ultrasonic characterization of conductive epoxy resin/polyaniline composites

A new bio‐based epoxy resin (BER) is produced by the esterification reaction between sebacic acid (SAc) as bio‐based acid and epichlorohydrin (ECH). The epoxy resin (ER) is modified with the BER. The biocomposites are prepared using untreated coconut shell powder (CSP), modified coconut shell powder (MCSP), and MER. The CSP and MCSP particles are mixed with MER in varied compositions (10–50 wt%) for preparation of the MER/CSP and MER/MCSP biocomposites. The influences of CSP and MCSP bio‐fillers amounts on the physical properties (density, elastic constants, acoustic impedance, ultrasonic micro‐hardness, and attenuation coefficient) of biocomposites are investigated using the ultrasonic pulse‐echo overlap method (PEOM). It was seen that the densities, both ultrasonic longitudinal and shear waves' velocity values of obtained biocomposites were higher than those of the MER. All elastic moduli of the MER/MCSP biocomposites have higher values than of the neat MER and MER/CSP biocomposites.

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“…Time of flight measurement process using the PEOM 55 [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Methodsmentioning

confidence: 99%

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Oral

Kocaman

Ahmetli

2021

J of Applied Polymer Sci

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“…Ramasamy et al synthesized PPy‐grafted graphene sheets (GS) via chemical oxidative polymerization with different weight ratios of GS:PPy (90:10, 50:50, and 25:75) and measured electrical conductivities of 26, 14, and 0.4 S/m, respectively. Xiao et al and Oral et al reported the polymerization of PANI via chemical oxidative polymerization. They determined that the conductivity of PANI was 406 and 59 S/m, respectively.…”

Section: Resultsmentioning

confidence: 99%

Study of the electroconductive properties of conductive polymers‐graphene/graphene oxide nanocomposites synthesized via in situ emulsion polymerization

et al. 2016

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The present study introduces a modified approach to synthesize polyaniline (PANI) and polypyrrole (PPy) doped with graphene oxide (GO) or graphene (GN) through an in situ emulsion polymerization (EP) technique. Dodecyl benzene sulfonic acid (DBSA) was used as a surfactant and doping agent as well during the polymerization reaction. The morphology and microstructure of the synthesized polymers and their nanocomposites were studied by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and thermogravimetric analysis. All of these characterization techniques confirmed the superior morphology and thermal properties of the nanocomposites. The electroconductive properties of the synthesized polymers and their nanocomposite pellets containing 5 wt% of either GN or GO pressed at pressures of 2, 4, and 6 tons were investigated with a four‐probe analyzer. Nanocomposites showed very high electrical conductivity compared to individual PANI and PPy samples pressed at the same pressures. The addition of GO and GN not only improved the thermal stability but also significantly enhanced the electrical conductivity of the nanocomposites. Thus, the present work signifies the importance of the direct loading of GO and GN into conductive polymers during the EP process using DBSA as a surfactant to achieve nanocomposites with promising properties for various semiconductive applications. POLYM. COMPOS., 39:2142–2150, 2018. © 2016 Society of Plastics Engineers

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“…The reduction in electrical conductivity compared to the conductivity of unsubstituted PANI is due to overall decreases in contribution of both intrachains and interchains to the whole conductivity. Although poly(N-alkylanilines) are highly processable, their low electrical conductivities restrict their potential applications [59].…”

Section: Solution Blending Methodsmentioning

confidence: 99%

A review of advances in the preparation and application of polyaniline based thermoset blends and composites

2020

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For several decades, forming blend and composite of polyaniline (PANI) with insulating polymers has been a widely studied research area because of the potential applications of such blends, which have a unique combination of mechanical properties, the processability of conventional polymers and the electrical property of conducting polymers. The current review paper will emphasize PANI composites or blends with thermosetting polymer matrices. The enhanced electro-mechanical properties of the blends and composites depend on the uniform dispersion of the PANI particle in polymer matrix. Therefore, considerable studies have focused on improving the distribution of PANI particles within the thermoset matrices. In this review paper, all the parameters and conditions that influence the surface morphology and application of PANI thermoset blends and composites will be described systematically. Recent progress on PANI based thermoset system with multifunctional ternary composites research will be highlighted in this paper. Furthermore, encouraging applications of different PANI thermoset composites and blends are discussed, such as flame-retardant materials, lightning damage suppression, metal ion removal, anticorrosive coating, electromagnetic shielding, conductive adhesives, and sensing materials.

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Ultrasonic characterization of conductive epoxy resin/polyaniline composites

Cited by 6 publications

References 68 publications

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Study of the electroconductive properties of conductive polymers‐graphene/graphene oxide nanocomposites synthesized via in situ emulsion polymerization

A review of advances in the preparation and application of polyaniline based thermoset blends and composites

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