Self-assembly and magnetorheological performance of Fe3O4-based liquid-crystalline composites

Tang, Xiaolu; Chang, Xiaolong; Zhang, Shuqi; Li, Xinrui; Wang, Shuo; Meng, Fanbao

doi:10.1016/j.molliq.2022.120927

Cited by 3 publications

(3 citation statements)

References 67 publications

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“…As can be seen from Figure 2D, for Fe 3 O 4 @PLCPs and PLCPs series, the melting temperature (Tm) and isotropization temperature (Ti) show a weakly increasing trend with the decrease of the content of PCh fraction based on PLCPs in the polymer system, while ∆T shows the opposite trend. The thermal properties of liquid crystal polymer PLCPs are usually influenced by the rigidity of the liquid crystal moieties of the polymer side chains, the molecular weight of the side chains, and the degree of cross‐linking 36 . In this study, 3,5‐pyridinedicarboxylic acid content increased from PLCP‐1 to PLCP‐3, while the PCh content decreased in these polymers.…”

Section: Resultsmentioning

confidence: 68%

“…It may be due to the increased intermolecular interactions of Fe 3 O 4 magnetic nanoparticles combined with PLCPs, when more energy is required to be absorbed by the polymer to disrupt chain stacking and enhance chain segment motion. And by comparing the Fe 3 O 4 @PLCPs and PLCPs data in the figures, the thermal range ∆T of the liquid crystal phase before and after self‐assembly changes slightly due to the dispersion of Fe 3 O 4 nanoparticles and the phase structure change caused by the nanoparticle self‐assembly 36,37 …”

Section: Resultsmentioning

confidence: 99%

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Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties

Wang,

Chang,

Diao

et al. 2024

Polymers for Advanced Techs

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Some supramolecular polyacrylate‐based liquid crystal polymers (PLCPs) were prepared by polyacrylic acid, a liquid crystal monomer and 3,5‐pyridinedicarboxylic acid. Series of magnetic liquid crystal particles (Fe3O4@PLCPs) with core‐shell structure were prepared by modifying surface of magnetic nanoparticles Fe3O4 by the PLCPs. The Fe3O4@PLCPs showed a saturation magnetization strength above 51.17 emu/g, which is similar to pure magnetic Fe3O4, indicating good magnetism and magnetic field dependence. Series of magnetorheological fluids were fabricated by Fe3O4@PLCPs (using as dispersed phase) and silicone oil (using as carrier liquid). The effects of mesogen, magnetic particle, and the polymer matrix on magnetorheological performance and settling stability were investigated. The magnetorheological fluid based on 10% Fe3O4@PLCP‐1 showed the best performance at an applied magnetic field of 100 mT in this study. Furthermore, the magnetorheological fluids showed excellent settling stability because the density of Fe3O4@PLCPs was lower than that of Fe3O4. The Fe3O4@PLCPs‐based fluids presented certain application potential in the field of magnetic fluid due to the excellent magnetorheological effect and settling stability.

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Section: Resultsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties

Wang,

Chang,

Diao

et al. 2024

Polymers for Advanced Techs

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“…The dynamic shear yield stress was determined by extrapolating the Bingham model fitting curve. [40] The Bingham model is described by Equation (3) as follows:…”

Section: Comparison Of Different Micro-nano Bidisperse Mr Fluidsmentioning

confidence: 99%

Balanced Devil Triangle: A Satisfactory Comprehensive Performance Magnetorheological Fluids with Cross‐Scale Particles

Du,

Zhao,

Liu

et al. 2023

Adv Funct Materials

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Magnetorheological (MR) fluids are magnetic responsive smart materials that are widely used in real‐time damping adjustment devices. However, a major challenge for MR fluids is balancing the constraints relationship among various key performances. This study demonstrates that by utilizing home‐made high saturation magnetization (208.0 emu g−1) nanoparticles as the second component in the preparation of cross‐scale bidisperse MR fluids, the shortcomings of monodisperse micron particles performance can be compensated, effectively balancing the relationship between various performances. This is attributed to the fact that the addition of nanoparticles enhances the density of chain structures under an applied magnetic field, while reducing the overall particle density without a magnetic field. By replacing part of micron particles with nanoparticles, the phenomenon of significant increase in zero‐field viscosity caused by the direct introduction of nanoparticles is avoided. The optimal content of nanoparticles in MR fluids is preliminarily explored, and the results indicate that Micro‐Nano bidisperse MR fluids exhibit a high dynamic yield strength (58.3 kPa when 436 kA m−1), excellent sedimentation stability (82.6% when 7 days), suitable zero‐field viscosity (1.25 Pa s when 100 s−1), and ideal reversibility. Most importantly, the simple preparation method adds significant engineering application value to these MR fluids.

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Liquid crystallinity and magnetorheological performance of polymeric liquid crystal magnetic composites

Tang,

Hu,

et al. 2024

Liquid Crystals

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Self-assembly and magnetorheological performance of Fe3O4-based liquid-crystalline composites

Cited by 3 publications

References 67 publications

Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties

Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties

Balanced Devil Triangle: A Satisfactory Comprehensive Performance Magnetorheological Fluids with Cross‐Scale Particles

Liquid crystallinity and magnetorheological performance of polymeric liquid crystal magnetic composites

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Self-assembly and magnetorheological performance of Fe3O4-based liquid-crystalline composites

Cited by 3 publications

References 67 publications

Fabrication of liquid crystal Fe3O4 composites and their magnetorheological properties

Fabrication of liquid crystal Fe3O4 composites and their magnetorheological properties

Balanced Devil Triangle: A Satisfactory Comprehensive Performance Magnetorheological Fluids with Cross‐Scale Particles

Liquid crystallinity and magnetorheological performance of polymeric liquid crystal magnetic composites

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Product

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Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties

Fabrication of liquid crystal Fe₃O₄ composites and their magnetorheological properties