Electrorheological and dielectric behavior of new ionic liquid/silica systems

Marins, Jéssica Alves; Soares, Bluma G.; Silva, Adriana A.; Hurtado, Mayra González; Livi, Sébastien

doi:10.1016/j.jcis.2013.05.013

Cited by 48 publications

(36 citation statements)

References 42 publications

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“…These materials constitute a new family of thermally-resistant structurally-ordered solids that can be exploited in areas like electrochemistry [21,91,92], catalysis [93,94], biocatalysis, optics, sensors [85], electrorheological fluids [95][96][97] and nanocomposites preparation [4,[6][7][8][9]11]. …”

Section: Colloids Interfacesmentioning

confidence: 99%

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

Donato

Matějka

Mauler

et al. 2017

Colloids and Interfaces

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Abstract:Understanding the organic-inorganic interphases of hybrid materials allows structure and properties control for obtaining new advanced materials. Lately, the use of ionic liquids (ILs) and poly(ionic liquids) (PILs) allowed structure control from the first sol-gel reaction steps due to their anisotropy and multiple bonding capacity. They also act as multifunctional compatibilizing agents that affect the interfacial interactions in a molecular structure-dependent manner. Thus, this review will explore the concepts and latest efforts to control silica morphology using processes such as the sol-gel, both in situ and ex situ of polymer matrices, pre-polymers or polymer precursors. It discusses how to control the polymer-filler interphase bonding, highlighting the last achievements in the interphase ionicity control and, consequently, how these affect the final nanocomposites providing materials with barrier, shape-memory and self-healing properties.

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Section: Colloids Interfacesmentioning

confidence: 99%

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

Donato

Matějka

Mauler

et al. 2017

Colloids and Interfaces

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“…The reversible magnetization and demagnetization upon the application of an eternal magnetic field applied alters the rheological properties of suspensions. Similar to MR suspensions, electrorheological (ER) fluids are composed of electrically polarizable particles dispersed in an insulating liquid and features electrically reversible and tunable behavior [11].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Sim¹,

Chae²,

Choi³

2015

Express Polym. Lett.

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Abstract. Polyaniline (PANI)-coated iron oxide (Fe 3 O 4 ) sphere particles were fabricated and applied to a dual stimuliresponsive material under electric and magnetic fields, respectively. Sphere Fe 3 O 4 particles were synthesized by a solvothermal process and protonated after acidification. The aniline monomer tended to surround the surface of the Fe 3 O 4 core due to the electrostatic and hydrogen bond interactions. A core-shell structured product was finally formed by the oxidation polymerization of PANI on the surface of Fe 3 O 4 . The formation of Fe 3 O 4 @PANI particles was examined by scanning electron microscope and transmission electron microscope. The bond between Fe 3 O 4 and PANI was confirmed by Fourier transform-infrared spectroscope and magnetic properties were analyzed by vibration sample magnetometer. A hybrid of a conducting and magnetic particle-based suspension displayed dual stimuli-response under electric and magnetic fields. The suspension exhibited typical electrorheological and magnetorheological behaviors of the shear stress, shear viscosity and dynamic yield stress, as determined using a rotational rheometer. Sedimentation stability was also compared between Fe 3 O 4 and Fe 3 O 4 @PANI suspension.

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“…These results are in agreement with the best ER response of the IL-ORMOSIL 2 -based suspension. graphene oxide [46], urea-modified silica particles [13], and also the silica particles containing ionic liquid physically confined within the silica particles [26][27]. Summarizing, the results presented in this work offer new opportunities for developing smart ER fluids with outstanding, rapid and reversible response without the problem of leaching the IL during the service life.…”

Section: Dielectric Propertiesmentioning

confidence: 72%

“…The suspension containing silica particles displayed low viscosity, which did not depend on the applied strain.. [45], which also increased as the shear rate increases. This value is very high, as compared with other systems based on silica particles containing confined phosphonium-based ionic liquid [26][27]. The IL-ORMOSIL 3 resulted in lower ER response due to the instability of the this suspension.…”

Section: Rheological Behaviour Of the Particle Suspensionsmentioning

confidence: 82%

“…Due to the unique characteristics of IL such as excellent thermal stability, good ionic conductivity and negligible vapor pressure, such ionogels containing IL confined within the silica particles are expected to promote good ER response of ERF . Indeed, our previous work described the preparation of silica in the presence of triphenyl-phosphonium-based IL and studied the effecticiency of these ionogels used for preparation of ERF [26]. The use of 10% of such silica led to reasonable ER performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ionic liquid-based organically modified silica for the development of new electrorheological fluids

Marins

Soares

2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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To cite this version:Jéssica Alves Marins, Bluma Soares. Ionic liquid-based organically modified silica for the development of new electrorheological fluids. Colloids The presence of the silylated ionic liquid covalently attached to the silica particles was confirmed by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The effect of the amount of imidazolium-based ionic liquid immobilized on the spherical silica particles on the electrorheological (ER) behavior of the corresponding suspensions in silicone oil was investigated. A significant ER effect was observed for the fluid containing silica modified with around 10%wt. of IL-TMOS. In fact, a very good, extremely rapid and reversible response under the action of an electric field at intensity to 4 kV/mm was achieved, with shear stress value as high as 2200 Pa. The dielectric properties were also evaluated to explain the ER response of these IL-ORMOSIL particles

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Electrorheological and dielectric behavior of new ionic liquid/silica systems

Cited by 48 publications

References 42 publications

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Ionic liquid-based organically modified silica for the development of new electrorheological fluids

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