Modified nano-magnetite coated carbon fibers magnetic and microwave properties

Osouli-Bostanabad, Karim; Hosseinzade, Ehsan; Kianvash, A.; Entezami, Ali Akbar

doi:10.1016/j.apsusc.2015.08.115

Cited by 48 publications

(11 citation statements)

References 41 publications

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“…A large concentration for the complexing agent TEA was chosen (i.e., a concentration of 0.2 M) as well as a long deposition time (i.e., 5 min) to induce the creation of flake-like Fe 3 O 4 , which mixed with granular shapes, were thought to increase contact surface area with the polymeric matrix and therefore enhanced adhesion when the composite was produced. SEM examination of the magnetised fibres (arrows in Figure 1) show nanoflakes and nodules formed on the CF surfaces, in agreement with [22,23] and with [20], who report similar results with an 80°C electrolyte temperature and at the larger TEA concentration, where flake-like and nodular particles coexisted. It was confirmed through this study that the electrolytic bath temperature had a dominant effect in the formation of Fe 3 O 4 magnetite particles and therefore this was rigorously maintained at 80°C.…”

Section: Fibre Functionalisation Via In Situ Synthesis Of the Magnetite Nanoparticlessupporting

confidence: 85%

“…The nitric acid treatment also increased wettability by removing the fibre sizing but was limited to 18 h since longer treatment led to weaker fibres. The electrodeposition process was optimised with reference to the dominant processing parameters [20][21][22]27]: the electrolyte temperature and the deposition time. This maximised the formation of a ferrimagnetic magnetite coating on the surface of the electronegative CF surfaces (i.e., oxidised by the nitric acid) via a repeated routine in which the fibre was positioned differently at each successive step to ensure extensive coverage and sufficient thickness to display ferrimagnetic properties.…”

Section: Fibre Functionalisation Via In Situ Synthesis Of the Magnetite Nanoparticlesmentioning

confidence: 99%

“…Its potential resides in: its low process temperature; standard pressure requirement; relatively low-cost without the need for expensive ancillaries; and the possibility of deployment as a continuous process. The cathodic electrodeposition of iron oxides onto carbon fibre with the aid of a complexing agent such as Triethylamine (TEA) at low temperatures has been reported, with good results of fibre adhesion properties [19][20][21][22][23]. The polyvalent Fe 3+ ions tend to precipitate insoluble Fe(OH) 3 in alkaline environments.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced interfacial adhesion and mechanical performance of lightweight polyurethane foam reinforced with a low content of aligned magnetised short carbon fibres

Torres-Sánchez

Abyaneh

Holt

et al. 2020

Composite Interfaces

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An increase in interfacial properties between the matrix, a polyurethane cellular foam, and the reinforcement, a short carbon fibre, led to improved mechanical properties of a lightweight composite. The carbon fibre surface modification was designed with two aims: to impart magnetic properties so the discontinuous fibres could be aligned on-demand during the manufacturing process using a weak magnetic field, and to promote interfacial adhesion between the matrix and the reinforcement. After surface treatment, functionalising and coating with magnetite nanoparticles created and deposited in situ via electrodeposition prior to their deployment, the fibres were susceptible to magnetic manipulation and orientation within the reacting foam. The fibre coating contributed to interfacial compatibilization between the matrix and the reinforcement. Comparing the results between unreinforced, reinforced with untreated fibre, and reinforced with magnetised fibre, the results show that: foam reinforced with a low %vol content, i.e., from 0.1%vol to 0.4%vol, of any of the fibres improved specific strength, stiffness and toughness in tension relative to the unreinforced cellular polymeric matrix without densification, modification of cell size or compromising their lightweight properties. The magnetised fibre-containing composites showed significantly improved mechanical properties overall in tension, when compared to the untreated fibres, due to their enhanced interfacial adhesion and their alignment in the matrix. Results in compression yielded improvement only in compressive strength, with other properties being similar to the unreinforced matrices. No significant differences were observed between the magnetised (aligned fibres) and the untreated (randomly distributed) configurations in compression.

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Section: Fibre Functionalisation Via In Situ Synthesis Of the Magnetite Nanoparticlessupporting

confidence: 85%

Section: Fibre Functionalisation Via In Situ Synthesis Of the Magnetite Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced interfacial adhesion and mechanical performance of lightweight polyurethane foam reinforced with a low content of aligned magnetised short carbon fibres

Torres-Sánchez

Abyaneh

Holt

et al. 2020

Composite Interfaces

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show abstract

“…Fe 3 O 4 /CFs has the strongest RL of À10 dB at 12.27 GHz. 11 Salimkhani et al investigated magnetite (nano-Fe 3 O 4 ) coated carbon bers (MCCFs) composites by using the electrophoretic deposition (EPD) technique. And the strongest reection loss (RL) of MCCFs was recognized to be À7.8 dB at 9.3 GHz for a layer containing 50 wt% MCCFs with 2 mm in thickness.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and microwave absorption properties of Fe@carbon fibers

Zhang

Zhao

et al. 2020

RSC Adv.

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“…So that, the preparation and application of magnetic materials with electromagnetic properties have been studying. 6), 7) Magnetite is a magnetic mineral which naturally occurs in numerous geological formations. Magnetic powders and ceramics materials derived from sintering method are used for microwave absorbers and electromagnetic devices.…”

Section: Introductionmentioning

confidence: 99%

Influence of the proportion of silica and alumina on magnetite spontaneous crystallization in glass system

Liu

Zhu

Zhang

et al. 2018

J. Ceram. Soc. Japan

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Ferrimagnetic bulk glass-ceramics and glass fibers containing magnetite crystals in the system SiO 2 Al 2 O 3 Fe 2 O 3 B 2 O 3 CaOMgOZnO were prepared via different fabrication methods. The X-ray diffraction, scanning and transmission electron microscopy, vibrating sample magnetometer, electromagnetic parameters, Mössbauer spectra and calorimetric measurements were employed to characterize structure and detect performance of the samples. The estimated size of the spontaneous crystallized magnetite is about 30 nm. The influence of intermediate oxide alumina substituting for network former oxide silica on the spontaneous crystallization of magnetite in glass was investigated. Our results indicated that the ability of magnetite spontaneous crystallization without performing nucleation and crystallization heat treatments was dependent on the chemical composition and fabrication methods.

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Modified nano-magnetite coated carbon fibers magnetic and microwave properties

Cited by 48 publications

References 41 publications

Enhanced interfacial adhesion and mechanical performance of lightweight polyurethane foam reinforced with a low content of aligned magnetised short carbon fibres

Enhanced interfacial adhesion and mechanical performance of lightweight polyurethane foam reinforced with a low content of aligned magnetised short carbon fibres

Synthesis and microwave absorption properties of Fe@carbon fibers

Influence of the proportion of silica and alumina on magnetite spontaneous crystallization in glass system

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