The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Melvin Khoo - One of the best experts on this subject based on the ideXlab platform.
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micro magnetic Silicone Elastomer membrane actuator
Sensors and Actuators A-physical, 2001Co-Authors: Melvin KhooAbstract:We present results of the design, fabrication, and testing of a microfabricated, membrane-type magnetic actuator. Magnetic pieces made of electroplated Permalloy (Ni80Fe20) are embedded in a thin flexible membrane made of Silicone Elastomer. When an external magnetic field is applied, a torque generated on the magnetic pieces produces membrane displacement. Permalloy pieces that are 100-mm-wide, 870mm-long, and 22-mm-thick are strategically positioned in a 2-mm-square, 40-mm-thick polydimethylsiloxane (PDMS) membrane (Sylgard 184). This design, produced through numerical simulations, is optimized to realize large membrane displacements. Tests performed on this membrane actuator showed displacements >80 mm in the presence of a 2:85 10 5 A/m external magnetic field. Larger displacements are possible with greater magnetization fields. This type of membrane actuator can be applied to the fabrication of tetherless micropumps for use in microfluidic systems. # 2001 Elsevier Science B.V. All rights reserved.
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Micro magnetic Silicone Elastomer membrane actuator
Sensors and Actuators A: Physical, 2001Co-Authors: Melvin Khoo, Chang LiuAbstract:We present results of the design, fabrication, and testing of a microfabricated, membrane-type magnetic actuator. Magnetic pieces made of electroplated Permalloy (Ni80Fe20) are embedded in a thin flexible membrane made of Silicone Elastomer. When an external magnetic field is applied, a torque generated on the magnetic pieces produces membrane displacement. Permalloy pieces that are 100-μm-wide, 870-μ-long, and 22-μ-thick are strategically positioned in a 2-mm-square, 40-μ-thick polydimethylsiloxane (PDMS) membrane (Sylgard 184). This design, produced through numerical simulations, is optimized to realize large membrane displacements. Tests performed on this membrane actuator showed displacements >80 μm in the presence of a 2.85 × 105A/m external magnetic field. Larger displacements are possible with greater magnetization fields. This type of membrane actuator can be applied to the fabrication of tetherless micropumps for use in microfluidic systems. © 2001 Elsevier Science B.V.
Y. Suzuoki - One of the best experts on this subject based on the ideXlab platform.
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Effect of Filler Amount on Relative Permittivity and Deformation Rate of TiO 2 /Silicone Elastomer Composite
2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2019Co-Authors: R. Fujihara, K. Naya, M. Kurimoto, T. Kato, M. Imanaka, S. Sugimoto, Y. SuzuokiAbstract:Power generation output of dielectric Elastomer generator depends on the relative permittivity of the Elastomer sheet. High permittivity filler such as TiO 2 filler increases the relative permittivity of the Elastomer sheet. However, the filler may reduce the amount of the stretch deformation, resulting in a decrease in the power generation output. In this paper, the effect of filler amount on the relative permittivity and deformation rate of TiO 2 /Silicone Elastomer composite were evaluated. The relative permittivity of TiO 2 /Silicone Elastomer composite having large filler-amount was high. At low tensile loading, the deformation rate of TiO 2 /Silicone Elastomer composite having large filler-amount was low. With using the measurement value of deformation rate and relative permittivity, the calculation model for generation output of the Elastomer was constructed and the effect of filler amount on the generation output was discussed.
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Effect of Filler Amount on Relative Permittivity and Deformation Rate of TiO2/Silicone Elastomer Composite
2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2019Co-Authors: R. Fujihara, K. Naya, M. Kurimoto, T. Kato, M. Imanaka, S. Sugimoto, Y. SuzuokiAbstract:Power generation output of dielectric Elastomer generator depends on the relative permittivity of the Elastomer sheet. High permittivity filler such as TiO2 filler increases the relative permittivity of the Elastomer sheet. However, the filler may reduce the amount of the stretch deformation, resulting in a decrease in the power generation output. In this paper, the effect of filler amount on the relative permittivity and deformation rate of TiO2/Silicone Elastomer composite were evaluated. The relative permittivity of TiO2/Silicone Elastomer composite having large filler-amount was high. At low tensile loading, the deformation rate of TiO2/Silicone Elastomer composite having large filler-amount was low. With using the measurement value of deformation rate and relative permittivity, the calculation model for generation output of the Elastomer was constructed and the effect of filler amount on the generation output was discussed.
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Relative Permittivity of TiO 2 /Silicone Elastomer Composite Stretched in Uniaxial Direction
2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2018Co-Authors: K. Naya, M. Kurimoto, T. Kato, Y. SuzuokiAbstract:A dielectric Elastomer is used for conversion of electrical and mechanical energy. The output energy of dielectric Elastomer depends on the relative permittivity of the Elastomer sheet. The relative permittivity of the Elastomer can be increased by filling the Elastomer with high permittivity particles. In this paper, the relative permittivity of TiO 2 /Silicone Elastomer composites was measured in the uniaxial stretching experiment assuming the state of use of dielectric Elastomer. The relative permittivity of TiO 2 /Silicone Elastomer composite was higher than that of unfilled Silicone Elastomer and also increased with the increase in the volume fraction of TiO 2 particles. The uniaxial stretching reduced the relative permittivity of the composite. The decreasing ratio of the stretched composites was larger than that of the stretched Silicone.
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Relative Permittivity of TiO2/Silicone Elastomer Composite Stretched in Uniaxial Direction
2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2018Co-Authors: K. Naya, M. Kurimoto, T. Kato, Y. SuzuokiAbstract:A dielectric Elastomer is used for conversion of electrical and mechanical energy. The output energy of dielectric Elastomer depends on the relative permittivity of the Elastomer sheet. The relative permittivity of the Elastomer can be increased by filling the Elastomer with high permittivity particles. In this paper, the relative permittivity of TiO2/Silicone Elastomer composites was measured in the uniaxial stretching experiment assuming the state of use of dielectric Elastomer. The relative permittivity of TiO2/Silicone Elastomer composite was higher than that of unfilled Silicone Elastomer and also increased with the increase in the volume fraction of TiO2particles. The uniaxial stretching reduced the relative permittivity of the composite. The decreasing ratio of the stretched composites was larger than that of the stretched Silicone.
Chang Liu - One of the best experts on this subject based on the ideXlab platform.
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Micro magnetic Silicone Elastomer membrane actuator
Sensors and Actuators A: Physical, 2001Co-Authors: Melvin Khoo, Chang LiuAbstract:We present results of the design, fabrication, and testing of a microfabricated, membrane-type magnetic actuator. Magnetic pieces made of electroplated Permalloy (Ni80Fe20) are embedded in a thin flexible membrane made of Silicone Elastomer. When an external magnetic field is applied, a torque generated on the magnetic pieces produces membrane displacement. Permalloy pieces that are 100-μm-wide, 870-μ-long, and 22-μ-thick are strategically positioned in a 2-mm-square, 40-μ-thick polydimethylsiloxane (PDMS) membrane (Sylgard 184). This design, produced through numerical simulations, is optimized to realize large membrane displacements. Tests performed on this membrane actuator showed displacements >80 μm in the presence of a 2.85 × 105A/m external magnetic field. Larger displacements are possible with greater magnetization fields. This type of membrane actuator can be applied to the fabrication of tetherless micropumps for use in microfluidic systems. © 2001 Elsevier Science B.V.
Chenghao Zhou - One of the best experts on this subject based on the ideXlab platform.
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coaxial printing of Silicone Elastomer composite fibers for stretchable and wearable piezoresistive sensors
Polymers, 2019Co-Authors: Zhenhua Tang, Bo Li, Chenghao ZhouAbstract:Despite the tremendous efforts dedicated to developing various wearable piezoresistive sensors with sufficient stretchability and high sensitivity, challenges remain pertaining to fabrication scalability, cost, and efficiency. In this study, a facile, scalable, and low-cost coaxial printing strategy is employed to fabricate stretchable and flexible fibers with a core–sheath structure for wearable strain sensors. The highly viscous silica-modified Silicone Elastomer solution is used to print the insulating sheath layer, and the Silicone Elastomer solutions containing multi-walled carbon nanotubes (CNTs) are used as the core inks to print the conductive inner layer. With the addition of silica powders as viscosifiers, silica-filled Silicone ink (sheath ink) converts to printable ink. The dimensions of the printed coaxial fibers can be flexibly controlled via adjusting the extrusion pressure of the inks. In addition, the electro-mechanical responses of the fiber-shaped strain sensors are investigated. The printed stretchable and wearable fiber-like CNT-based strain sensor exhibits outstanding sensitivities with gauge factors (GFs) of 1.4 to 2.5 × 106, a large stretchability of 150%, and excellent waterproof performance. Furthermore, the sensor can detect a strain of 0.1% and showed stable responses for over 15,000 cycles (high durability). The printed fiber-shaped sensor demonstrated capabilities of detecting and differentiating human joint movements and monitoring balloon inflation. These results obtained demonstrate that the one-step printed fiber-like strain sensors have potential applications in wearable devices, soft robotics, and electronic skins.
Joseph Delhalle - One of the best experts on this subject based on the ideXlab platform.
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preparation and electrical characterization of a Silicone Elastomer composite charged with multi wall carbon nanotubes functionalized with 7 octenyltrichlorosilane
Composites Science and Technology, 2007Co-Authors: Laurence Vast, Zineb Mekhalif, Antonio Fonseca, J B Nagy, Joseph DelhalleAbstract:Multi-walled carbon nanotubes, chemically functionalized with 7-octenytrichlorosilane, are dispersed in one of the two reactive parts used to form a Silicone Elastomer. Links between the functionalized carbon nanotubes and the polymer matrix are created in situ during the curing step. Electrical and electrochemical properties of the Silicone Elastomer loaded with raw, purified, oxidized and functionalized carbon nanotubes are compared.