Fabrication of dopamine grafted polyaniline/carbonyl iron core-shell typed microspheres and their magnetorheology

Moon, Il Jae; Choi, Hyoung Jin; Kim, Namhui; You, Chun‐Yeol

doi:10.1016/j.colsurfa.2016.04.037

Cited by 23 publications

(14 citation statements)

References 42 publications

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“…Compared with other conductive polymers, PANI attracts much more attentions of researchers due to its simple preparation method, excellent conductivity, and stability [23,24]. In order to increase the multifunctional properties and get improved performances, many scientists have conducted extensive research on conductive polymer/magnetic particle composites, which possess advantages of both the magnetic and the conductive materials [25,26].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization

Zhang

Chen

Hong

2019

Journal of Nanomaterials

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In this paper, the magnetite/polyaniline (PANI) nanocomposite was prepared by the novel reverse in situ polymerization method. Fe3O4 magnetic nanoparticles were synthesized in situ in PANI chloroform solution to form a suspension containing the Fe3O4/PANI nanocomposite. It overcame the disadvantage of oxidation of the Fe3O4 by the oxidant in conventional method. The Fe3O4/PANI chloroform suspension and the Fe3O4/PANI powder were characterized by FT-IR, TEM, XRD, vibrating sample magnetometer, Gouy magnetic balance, conductivity meter, and vector network analyzer. It is demonstrated that the Fe3O4/PANI suspension has a good electrical conductivity that is up to 2.135 μS/cm at the optimal ratio of reactants. The Fe3O4 nanoparticles are well dispersed in the PANI network with a particle size of about 10 nm. Fe3O4/PANI powder has high saturation magnetization and magnetic susceptibility, as well as a broad application prospect in the field of electromagnetic devices. The Fe3O4/PANI powder exhibits an excellent microwave absorption behavior, which can be an outstanding candidate for the rapid development of broadband shielding materials.

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Section: Introductionmentioning

confidence: 99%

Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization

Zhang

Chen

Hong

2019

Journal of Nanomaterials

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“…When the 0.5 wt.% of BF particles were added to pure CI, the M s value of the CI/BF mixture particles appeared to be slightly increased. Overall, BF particles, which exhibit hardmagnetic properties with magnetic hysteresis, could improve the MR performance in the magnetic response of a CI microparticlebased MR fluid, as shown in Figure 2 (Moon et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…These structural characteristics promoted the response to the magnetic field, forming stronger chain structures and improving the MR performance. The 0.5 wt% additive concentration was used because too much additive in the MR fluid resulted in a significant increase in shear viscosity without increasing the MR performance (Iglesias et al, 2012;Moon et al, 2016). In addition, the pure BF-based MR fluid has relatively less shear stress and shear viscosity, which can also be predicted and explained with its low Ms value and hard-magnetic property.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Magnetorheological Performance of Carbonyl Iron Suspension Added With Barium Ferrite Nanoparticle

Jang

Choi

2021

Front. Mater.

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Hard-magnetic barium ferrite (BF) nanoparticles with a hexagonal plate-like structure were used as an additive to a carbonyl iron (CI) microparticle-based magnetorheological (MR) fluid. The morphology of the pristine CI and CI/BF mixture particles was examined by scanning electron microscopy. The saturation magnetization and coercivity values of each particle were measured in the powder state by vibrating sample magnetometry. The MR characteristics of the CI/BF MR fluid measured using a rotation rheometer under a range of magnetic field strengths were compared with those of the CI-based MR fluid. The flow behavior of both MR fluids was fitted using a Herschel–Bulkley model, and their stress relaxation phenomenon was examined using the Schwarzl equation. The MR fluid with the BF additive showed higher dynamic and elastic yield stresses than the MR fluid without the BF additive as the magnetic field strength increased. Furthermore, the BF nanoparticles embedded in the space between the CI microparticles improved the dispersion stability and the MR performance of the MR fluid.

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“…The coated polysiloxane layer is nanometer-scale (60 nm) but has excellent resistance to thermal oxidation and acid corrosion (Pu et al, 2006a). Moon et al (2016) developed a core-shell system on magnetic carbonyl iron particles. The magnetorheological fluid is made of polyaniline coating and carbonyl iron micronutrients, which are synthesized through the polymerization process.…”

Section: Coating Microparticlesmentioning

confidence: 99%

The effect of microparticles/nanoparticles surface modification on the magnetorheological fluid properties: A review

Rabbani

Hajinajaf

Shariaty-Niassar

2023

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluids are considered smart materials since their properties change significantly when exposed to a magnetic field, making them interesting for a variety of industries. These fluids are composed of three main components: dispersed particles, carrier fluid, and additives. The latter of which has been the subject of various studies. Therefore, this paper reviews the characteristics and parameters of the particles dispersed in additives and their impact on fluid rheological properties and stability. Also, the surface modification of magnetic and non-magnetic micro and nanoparticles have been investigated. A detailed review of previous studies has been carried out to examine the effects of various parameters such as types of coatings, coating layers, coating thickness, density change, and change in magnetic saturation, on the stability and rheological properties of MR fluids.

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Fabrication of dopamine grafted polyaniline/carbonyl iron core-shell typed microspheres and their magnetorheology

Cited by 23 publications

References 42 publications

Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization

Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization

Enhanced Magnetorheological Performance of Carbonyl Iron Suspension Added With Barium Ferrite Nanoparticle

The effect of microparticles/nanoparticles surface modification on the magnetorheological fluid properties: A review

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Fabrication of dopamine grafted polyaniline/carbonyl iron core-shell typed microspheres and their magnetorheology

Cited by 23 publications

References 42 publications

Preparation and Conductive and Electromagnetic Properties of Fe3O4/PANI Nanocomposite via Reverse In Situ Polymerization

Preparation and Conductive and Electromagnetic Properties of Fe3O4/PANI Nanocomposite via Reverse In Situ Polymerization

Enhanced Magnetorheological Performance of Carbonyl Iron Suspension Added With Barium Ferrite Nanoparticle

The effect of microparticles/nanoparticles surface modification on the magnetorheological fluid properties: A review

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Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization

Preparation and Conductive and Electromagnetic Properties of Fe₃O₄/PANI Nanocomposite via Reverse In Situ Polymerization