Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

Kugabaeva, Gulsara D.; Kydralieva, Kamila A.; Bondarenko, Lyubov S.; Baimuratova, Rose K.; Karpenkov, Dmitry Yu.; Golovkova, Ekaterina A.; Degtyarenko, Pavel N.; Golubeva, Nina D.; Uflyand, Igor E.; Dzhardimalieva, Gulzhian I.

doi:10.3390/magnetochemistry9100213

Cited by 3 publications

(4 citation statements)

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“…Polymers are also attractive coating materials for inorganic nanoparticles, which generate nanocomposites with enhanced thermal conductivity capable of performing as thermal interface materials for thermal management applications [26]. Bimetallic iron nanocomposites have also shown enhanced magnetic characteristics at different temperatures [27]. However, to our knowledge, there is a lack of thermal conductivity studies of bio-based polymer nanocomposites, including lignin@Fe 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Gautam,

Nabat Al-Ajrash,

Hasan

et al. 2024

Magnetochemistry

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Nanoparticle additives increase the thermal conductivity of conventional heat transfer fluids at low concentrations, which leads to improved heat transfer fluids and processes. This study investigates lignin-coated magnetic nanocomposites (lignin@Fe3O4) as a novel bio-based magnetic nanoparticle additive to enhance the thermal conductivity of aqueous-based fluids. Kraft lignin was used to encapsulate the Fe3O4 nanoparticles to prevent agglomeration and oxidation of the magnetic nanoparticles. Lignin@Fe3O4 nanoparticles were prepared using a pH-driven co-precipitation method with a 3:1 lignin to magnetite ratio and characterized by X-ray diffraction, FT-IR, thermogravimetric analysis, and transmission electron microscopy. The magnetic properties were characterized using a vibrating sample magnetometer. Once fully characterized, lignin@Fe3O4 nanoparticles were dispersed in aqueous 0.1% w/v agar–water solutions at five different concentrations, from 0.001% w/v to 0.005% w/v. Thermal conductivity measurements were performed using the transient line heat source method at various temperatures. A maximum enhancement of 10% in thermal conductivity was achieved after adding 0.005% w/v lignin@Fe3O4 to the agar-based aqueous suspension at 45 °C. At room temperature (25 °C), the thermal conductivity of lignin@Fe3O4 and uncoated Fe3O4 agar-based suspensions was characterized at varying magnetic fields from 0 to 0.04 T, which were generated using a permanent magnet. For this analysis, the thermal conductivity of lignin magnetic nanosuspensions initially increased, showing a 5% maximum peak increase after applying a 0.02 T magnetic field, followed by a decreasing thermal conductivity at higher magnetic fields up to 0.04 T. This result is attributed to induced magnetic nanoparticle aggregation under external applied magnetic fields. Overall, this work demonstrates that lignin-coated Fe3O4 nanosuspension at low concentrations slightly increases the thermal conductivity of agar aqueous-based solutions, using a simple permanent magnet at room temperature or by adjusting temperature without any externally applied magnetic field.

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Section: Introductionmentioning

confidence: 99%

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Gautam,

Nabat Al-Ajrash,

Hasan

et al. 2024

Magnetochemistry

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“…26 Recently, Kugabaeva and co-workers succeeded in obtaining magnetically active bimetallic nanoparticles (namely FeCo and FeNi) of a given composition and stabilized by an N-doped carbonized polymer matrix, which were simultaneously formed during the FP of suitable molecular precursors (namely cocrystallized acrylamide complexes of Fe(III)/Co(II) and Fe(III)/Ni(II) metal nitrates) and their successive controlled thermolysis. 27 The overall process is schematized in Figure 6. The so-obtained magnetic nanoparticles were found to be resistant to oxidation and aggregation; further, the frontal polymerization technique allowed for effective control of the size of nanoparticles and, finally, of their magnetic features.…”

Section: Some Recent Case Studiesmentioning

confidence: 99%

“…Recently, Kugabaeva and co-workers succeeded in obtaining magnetically active bimetallic nanoparticles (namely FeCo and FeNi) of a given composition and stabilized by an N-doped carbonized polymer matrix, which were simultaneously formed during the FP of suitable molecular precursors (namely cocrystallized acrylamide complexes of Fe(III)/Co(II) and Fe(III)/Ni(II) metal nitrates) and their successive controlled thermolysis . The overall process is schematized in Figure .…”

Section: Some Recent Case Studiesmentioning

confidence: 99%

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Frontal Polymerization for the Rapid Obtainment of Polymer Composites

Malucelli,

Mariani

2024

ACS Omega

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Among the different polymerization techniques, frontal polymerization (FP) has gained high interest from the scientific community because of its peculiar characteristics: in particular, compared to classic polymerization reactions, FP allows for a better exploitation of the heat of polymerization involved, without requiring any external energy input apart from an initial photo or thermal ignition that triggers the reaction. The latter usually propagates in a few tenths of seconds or (at most) minutes through a hot self-sustaining polymerization front, giving rise to the formation of fully cured thermosetting networks or thermoplastic polymers. Furthermore, different polymerization mechanisms can be involved in FP reactions, comprising cationic or anionic, ring-opening metathesis, and free-radical polymerization, among others. Further, it is possible to run FP reactions in bulk, in solution, or even using solid monomers if they are melted at the temperature of the front, notwithstanding the possibility of using reactive systems containing fillers or fiber/fabric reinforcements. In this context, the use of FP is becoming very important also for the design and production of advanced (nano)composite materials, saving processing time and achieving the completeness of the curing reaction, even in the presence of high filler/reinforcement loadings. Therefore, this mini-review aims to provide the reader with the basics of FP and its main peculiarities, even in the context of preparing highperforming composites. In this respect, some recent case studies witnessing the potentialities of frontal polymerization for the design of advanced (nano)composite systems will be elucidated. Finally, some perspectives about possible future developments will be proposed.

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Synthesis of Novel Nanomaterials Based on Fe^IIICo^II and Fe^IIINi^II Mixed Oxides: Characterization and Tribological Performance

Dzhardimalieva,

Kugabaeva,

Kydralieva

et al. 2024

ChemistrySelect

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In this work, nanomaterials based on FeIIICoII and FeIIINiII mixed oxides were obtained for the first time by thermal decomposition of polymer complexes of Fe and Co or Ni nitrates with acrylamide. During thermolysis, core‐shell nanomaterials are formed containing nanoparticles of FeCo and FeNi oxides uniformly distributed inside the carbon layer. These nanomaterials are characterized by high chemical and thermal stability. During thermolysis, nanoparticles of mixed oxides FeCo and FeNi were formed with an average crystallite size of 13–22 and 22–33 nm, respectively. Nanomaterials were tested as antifriction and antiwear additives to liquid industrial oil I‐20 A. The values of the friction coefficient decrease by more than 60 % when CoO⋅Fe2O3 with a concentration of 0.05 % is added to the industrial oil I‐20 A.

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Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

Cited by 3 publications

References 75 publications

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Frontal Polymerization for the Rapid Obtainment of Polymer Composites

Synthesis of Novel Nanomaterials Based on Fe^IIICo^II and Fe^IIINi^II Mixed Oxides: Characterization and Tribological Performance

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Polymer-Assisted Synthesis, Structure and Magnetic Properties of Bimetallic FeCo- and FeNi/N-Doped Carbon Nanocomposites

Cited by 3 publications

References 75 publications

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Experimental Thermal Conductivity Studies of Agar-Based Aqueous Suspensions with Lignin Magnetic Nanocomposites

Frontal Polymerization for the Rapid Obtainment of Polymer Composites

Synthesis of Novel Nanomaterials Based on FeIIICoII and FeIIINiII Mixed Oxides: Characterization and Tribological Performance

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Synthesis of Novel Nanomaterials Based on Fe^IIICo^II and Fe^IIINi^II Mixed Oxides: Characterization and Tribological Performance