One-step synthesis, characterization and properties of novel hybrid electromagnetic nanomaterials based on polydiphenylamine and Co–Fe particles in the absence and presence of single-walled carbon nanotubes

Ozkan, S. Zh.; Карпачева, Г. П.; Ефимов, М. Н.; Васильев, А. А.; Муратов, Д. Г.; Петров, В. А.; Чернавский, П. А.; Панкина, Г. В.

doi:10.1039/d1ra03114g

Cited by 7 publications

(6 citation statements)

References 77 publications

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“…It can be assumed that the formation mechanism of active polymerization centers described above determines the formation of more extended regions of continuous conjugation that are responsible for the polymer electrical conductivity and the degree of their order. This is confirmed by the very low electrical Table 2 shows the values of σ dc , as well as values σ ac and n. As can be seen from the table, the exponential parameter n is in the range of 0 < n < 1 for all studied polymers, which is typical for disperse systems with a hopping charge carrier transport mechanism [81][82][83]. The σ dc value plays a significant role at low frequencies.…”

Section: Some Properties Of the Obtained Polydiarylaminodichlorobenzoquinonessupporting

confidence: 61%

“…It indicates that the tunneling effect plays a minimal role [81]. Table 2 shows the values of σdc, as well as values σac and n. As can be seen from the table, the exponential parameter n is in the range of 0 < n < 1 for all studied polymers, which is typical for disperse systems with a hopping charge carrier transport mechanism [81][82][83]. The σdc value plays a significant role at low frequencies.…”

Section: Some Properties Of the Obtained Polydiarylaminodichlorobenzoquinonesmentioning

confidence: 88%

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Peculiarities of Oxidative Polymerization of Diarylaminodichlorobenzoquinones

et al. 2021

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New oxidative polymerization monomers—diarylaminodichlorobenzoquinones were synthesised by alkylating aniline, m-phenylenediamine and methanilic acid with chloranil. Oxidative polymerization of diarylaminodichlorobenzoquinones was studied for the first time in relation to the concentration of the monomer, acid, and oxidant/monomer ratio. It was found that the synthesized monomers are highly active in the polymerization reaction, and the oxidation rate grows with the increase in the acid concentration. Only one arylamine group is involved in the polymerization reaction. The optimal oxidant/monomer ratio is stoichiometric for one arylamine group, despite the bifunctionality of the monomers. It was shown that the type of the substituent in the aniline ring (electron donor or electron acceptor) determines the growth of the polymer chain and the structure of the resulting conjugated polymers. A mechanism for the formation of active polymerization centers for diarylaminodichlorobenzoquinones was proposed. FTIR-, NMR-, X-ray photoelectron spectroscopy, and SEM were used to identify the structure of the synthesized monomers and polymers. The obtained polymers have an amorphous structure and a loose globular morphology. The frequency dependence of the electrical conductivity was studied.

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Section: Some Properties Of the Obtained Polydiarylaminodichlorobenzoquinonessupporting

confidence: 61%

Section: Some Properties Of the Obtained Polydiarylaminodichlorobenzoquinonesmentioning

confidence: 88%

Peculiarities of Oxidative Polymerization of Diarylaminodichlorobenzoquinones

et al. 2021

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“…When the number of layers increases, the G peak moves to the left [ 22 ]. In addition, sp 2 amorphous carbon or diamond-like carbon will cause the G peak to shift to the right [ 23 ]. The 2D peak is located at a wave number of 2680 cm −1 , and its movement and shape are closely related to the graphene membrane number [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

Research on the Morphology Reconstruction of Deep Cryogenic Treatment on PtRu/nitrogen-Doped Graphene Composite Carbon Nanofibers

Zhu²,

Wang

et al. 2022

Materials

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To improve the performance of PtRu/nitrogen-doped graphene composite carbon nanofibers, the composite carbon nanofibers were thermally compensated by deep cryogenic treatment (DCT), which realized the morphology reconstruction of composite carbon nanofibers. The effects of different DCT times were compared: 12 h, 18 h, and 24 h. The morphology reconstruction mechanism was explored by combining the change of inner chain structure and material group. The results showed that the fibers treated for 12 h had better physical and chemical properties, where the diameter is evenly distributed between 500 and 800 nm. Combined with Fourier infrared analysis, the longer the cryogenic time, the more easily the water vapor and nitrogen enter polymerization reaction, causing changes of chain structure and degradation performance. With great performance of carbonization and group transformation, the PtRu/nitrogen-doped graphene composite carbon nanofibers can be used as an efficient direct alcohol fuel cell catalyst and promote its commercialization.

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“…Metal nanoparticles often play a major role, giving nanocomposites distinctive properties. In particular, the nature and composition of these nanoparticles largely dictate the catalytic [34,35], magnetic [36,37], photocatalytic [38], electrochemical [39][40][41], sensory [42], and antibacterial [43] characteristics of nanocomposite materials.…”

Section: Introductionmentioning

confidence: 99%

Formation Features of Polymer–Metal–Carbon Ternary Electromagnetic Nanocomposites Based on Polyphenoxazine

et al. 2023

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Novel ternary hybrid polyphenoxazine (PPOA)-derived nanocomposites involving Co-Fe particles and single-walled (SWCNTs) or multi-walled (MWCNTs) carbon nanotubes were prepared and investigated. An efficient one-pot method employing infrared (IR) heating enabled the formation of Co-Fe/CNT/PPOA nanocomposites. During this, the dehydrogenation of phenoxazine (POA) units led to the simultaneous reduction of metals by released hydrogen, yielding bimetallic Co-Fe particles with a size range from the nanoscale (5–30 nm) to the microscale (400–1400 nm). The synthesized Co-Fe/CNT/PPOA nanomaterials exhibited impressive thermal stability, demonstrating a half-weight loss at 640 °C and 563 °C in air for Co-Fe/SWCNT/PPOA and Co-Fe/MWCNT/PPOA, respectively. Although a slightly broader range of saturation magnetization values was obtained using MWCNTs, it was found that the type of carbon nanotube, whether an SWCNT (22.14–41.82 emu/g) or an MWCNT (20.93–44.33 emu/g), did not considerably affect the magnetic characteristics of the resulting nanomaterial. By contrast, saturation magnetization escalated with an increasing concentration of both cobalt and iron. These nanocomposites demonstrated a weak dependence of electrical conductivity on frequency. It is shown that the conductivity value for hybrid nanocomposites is higher compared to single-polymer materials and becomes higher with increasing CNT content.

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One-step synthesis, characterization and properties of novel hybrid electromagnetic nanomaterials based on polydiphenylamine and Co–Fe particles in the absence and presence of single-walled carbon nanotubes

Abstract: In a self-organizing system within one stage under IR heating conditions, hybrid nanomaterials are formed with a structure that contains bimetallic Co–Fe particles, free or immobilized on the SWCNT surface, dispersed in the polymer PDPA matrix.

Cited by 7 publications

References 77 publications

Peculiarities of Oxidative Polymerization of Diarylaminodichlorobenzoquinones

Peculiarities of Oxidative Polymerization of Diarylaminodichlorobenzoquinones

Research on the Morphology Reconstruction of Deep Cryogenic Treatment on PtRu/nitrogen-Doped Graphene Composite Carbon Nanofibers

Formation Features of Polymer–Metal–Carbon Ternary Electromagnetic Nanocomposites Based on Polyphenoxazine

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