Surface electrocoating of single carbon fibre with electroactive 3,4-ethylenedioxythiophene/1‐p(tolylsulphonyl) pyrrole copolymer: effect of dielectric constant of solvent

Polymer Engineering & Sci

2022

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Thermoelectric materials are of great importance as they are materials that can convert even a small waste heat in the environment into electrical energy. Today, interest in polymeric thermoelectric materials, which are low in cost, abundant in raw materials, and easy to process, has increased. In this study, PpPD, PSDA, and PpPD/PSDA composites were synthesized in aqueous medium by a simple method by chemical oxidative polymerization. The thermoelectric properties of the polymers were investigated and the PSDA ratio in the composite increased from 10% to 50%, while the Seebeck coefficient increased approximately 5 times from 70 μV/K to 340 μV/K. The highest Seebeck coefficient and power factor were obtained from PpPD/PSDA3 composite as 340 μV/K and 3.5 × 10−3 μW/mK2, respectively. It was observed that PpPD/PSDA composites had better thermoelectric properties and thermal stability than PpPD and PSDA.

Section: Resultsmentioning

confidence: 99%

Synthesis, characterization, and thermoelectric properties of poly(p‐phenylenediamine)/poly(sulfonic acid diphenyl aniline) composites

Polymer Engineering & Sci

2022

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“…SEM images were taken with a Philips‐FEI XL30 after being coated with gold at a current of 12 mA for 120 s. The CV technique was performed using, PARSTAT 2263 Model Potentiostat/Galvanostat with Power Suite software. [ 18 ] An electrospun nanofiber with an area of ~0.125 cm 2 , thin silver wire and platinum wire were used as working, a pseudo reference electrode and counter electrode, respectively, in CV and EIS measurements. For EIS measurements of electrospun nanofibers, a frequency range of 100 kHz to 0.01 Hz and a perturbation amplitude of 10 mV were studied.…”

Section: Methodsmentioning

confidence: 99%

Poly(ε‐caprolactone)/poly(m‐anthranilic acid) and poly(ε‐caprolactone)/poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) electrospun nanofibers: Characterization, antioxidant, and electrochemical properties

Polymer Engineering & Sci

2023

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Conducting polymers are widely used in many biomedical applications, but their non‐degradability and non‐biocompatibility limit their widespread use in applications. For this reason, many studies have been carried out on the developing degradable, biocompatible, and electrically conductive polymers. In this study, mixtures of conductive polymers (poly(m‐antranilic acid) (P3ANA) and poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS)) with biocompatible and biodegradable poly(ε‐caprolactone) (PCL) were prepared. Their nanofibers were obtained by electrospinning and their antioxidant properties were investigated by 2,2′‐azino‐bis‐3‐ethylbenzthiazoline‐6‐sulfonic acid (ABTS) and copper ion reducing antioxidant capacity (CUPRAC) assays. Electrochemical properties were also investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The highest antioxidant activity was obtained from PCL/P3ANA3 electrospun nanofiber containing 10% (of PCL w/w) P3ANA with 93 and 614 μg TE/mg values for ABTS and CUPRAC assays, respectively. This nanofiber was found to be non‐toxic according to 2,5‐diphenyl‐2H‐tetrazolium bromide (MTT) analysis. PCL/PEDOT:PSS electrospun nanofiber has the highest maximum anodic current value of 0.08 mA. The maximum anodic current value of PCL/P3ANA3 nanofiber with the highest amount of P3ANA is also higher than other PCL/P3ANA nanofibers. These nanofibers were characterized by FT‐IR, UV–vis., XRD and TGA and their surface morphologies were examined by scanning electron microscopy (SEM).

“…Since the properties of nanofibers can be changed by device parameters such as the applied voltage, the distance of the needle to the collector, the rotation speed of the collector, the injection speed and the polymer concentration, it is widely used to obtain nanofibers. [3,4] In this study, polythiophene (PTh), [5][6][7] one of the most used members of conductive polymers, [8,9] which is resistant to environmental conditions and has a stable chemical structure, was synthesized by chemical oxidation. Then, PTh/PSDA composites were obtained by synthesizing poly(sulfonic acid diphenyl aniline) (PSDA), [10] which is the sulfonated form of polyaniline on PTh.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, polythiophene (PTh), [5–7] one of the most used members of conductive polymers, [8,9] which is resistant to environmental conditions and has a stable chemical structure, was synthesized by chemical oxidation. Then, PTh/PSDA composites were obtained by synthesizing poly(sulfonic acid diphenyl aniline) (PSDA), [10] which is the sulfonated form of polyaniline on PTh.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Water‐Soluble Polythiophene/Poly (sulfonic acid diphenyl aniline)/Polyethylene Oxide Electrospun Nanofibers and Their Antioxidant Activities

2022

ChemistrySelect

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The fabrication and antioxidant properties of polythiophene/ poly(sulfonic acid diphenyl aniline)/polyethylene oxide electrospun nanofibers obtained in this study were brought to the literature for the first time. For this, polythiophene/poly(sulfonic acid diphenyl aniline)/polyethylene oxide (PTh/PSDA/PEO) nanofibers containing 5, 10, 20 and 40 % PTH/PSDA composite by weight were produced by electrospinning method. According to both CUPRAC and ABTS assays, these electrospun nanofibers were found to have antioxidant activity. According to both CUPRAC and ABTS assays, the highest antioxidant activity was obtained from PTh/PSDA/PEO4 electrospun nanofiber containing 40 % PTH/PSDA with values of 244 and 111 μg TE/mg, respectively. This nanofiber was found to be non-toxic according to the MTT assay and its thermal stability was not much different from that of the PEO nanofiber. PTh/PSDA/PEO electrospun nanofibers were biocompatible, water-soluble nanofibers that were candidates for use in many biological applications with further characterization. These electrospun nanofibers were characterized by FT-IR, UV-Vis., 1 H NMR, XRD and TGA. Surface morphologies were investigated by SEM.