Composites Based on Cotton Microfibers Impregnated with Magnetic Liquid for Magneto-Tactile Sensors

Bîcă, Ioan; Iacobescu, Gabriela

doi:10.3390/ma16083222

Cited by 1 publication

(4 citation statements)

References 50 publications

(65 reference statements)

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“…As is known [ 28 ], in the presence of the magnetic field superimposed on the field of mechanical deformations, at equilibrium, we have the following equation:

where

is the magnetic force,

is the gravity force and

is the reaction elastic force of MC, with the following:

where

is the elastic constant of MC placed in magnetic field superimposed on the mechanical deformation field,

and

are the thicknesses of MC in the presence and, respectively, in the absence of the magnetic field superimposed on the mechanical deformation field.…”

Section: Resultsmentioning

confidence: 99%

“…As is known [28], in the presence of the magnetic field superimposed on the field of mechanical deformations, at equilibrium, we have the following equation:…”

Section: Resultsmentioning

confidence: 99%

“…The experimental setup used for the study of the electrical conductivity of the MC under mechanical and magnetic stress is represented in Figure 1. Experimental setup [28]. 1-magnetic core, 2-coil, 3-non-magnetic spindle, 4-nonmagnetic plate, 5-non-magnetic disc, 6-marked non-magnetic masses, N and S-magnetic poles, ED-electric device, Br-RLC bridge, Gs-Gaussmeter, h-Hall probe, DCS-continuous source current, Oz-coordinate axis, B ⃗ -magnetic flux density vector, F ⃗ -force vector, I-intensity of the electrical current.…”

Section: Experimental Methods and Measurementsmentioning

confidence: 99%

“… Experimental setup [ 28 ]. 1—magnetic core, 2—coil, 3—non-magnetic spindle, 4—non-magnetic plate, 5—non-magnetic disc, 6—marked non-magnetic masses, N and S—magnetic poles, ED—electric device, Br—RLC bridge, Gs—Gaussmeter, h—Hall probe, DCS—continuous source current, Oz—coordinate axis,

—magnetic flux density vector,

—force vector, I —intensity of the electrical current.…”

Section: Figurementioning

confidence: 99%

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A Cotton Fabric Composite with Light Mineral Oil and Magnetite Nanoparticles: Effects of a Magnetic Field and Uniform Compressions on Electrical Conductivity

et al. 2023

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Over the past few decades, tactile sensors have become an emerging field of research with direct applications in the area of biomedical engineering. New types of tactile sensors, called magneto-tactile sensors, have recently been developed. The aim of our work was to create a low-cost composite whose electrical conductivity depends on mechanical compressions that can be finely tuned using a magnetic field for magneto-tactile sensor fabrication. For this purpose, 100% cotton fabric was impregnated with a magnetic liquid (EFH-1 type) based on light mineral oil and magnetite particles. The new composite was used to manufacture an electrical device. With the experimental installation described in this study, we measured the electrical resistance of an electrical device placed in a magnetic field in the absence or presence of uniform compressions. The effect of uniform compressions and the magnetic field was the induction of mechanical–magneto–elastic deformations and, as a result, variations in electrical conductivity. In a magnetic field with a flux density of 390 mT, in the absence of mechanical compression forces, a magnetic pressure of 5.36 kPa was generated, and the electrical conductivity increased by 400% compared to that of the composite in the absence of a magnetic field. Upon increasing the compression force to 9 N, in the absence of a magnetic field, the electrical conductivity increased by about 300% compared to that of the device in the absence of compression forces and a magnetic field. In the presence of a magnetic flux density of 390 mT, and when the compression force increased from 3 N to 9 N, the electrical conductivity increased by 2800%. These results suggest the new composite is a promising material for magneto-tactile sensors.

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“…As is known [ 28 ], in the presence of the magnetic field superimposed on the field of mechanical deformations, at equilibrium, we have the following equation:

where

is the magnetic force,

is the gravity force and

is the reaction elastic force of MC, with the following:

where

is the elastic constant of MC placed in magnetic field superimposed on the mechanical deformation field,

and

are the thicknesses of MC in the presence and, respectively, in the absence of the magnetic field superimposed on the mechanical deformation field.…”

Section: Resultsmentioning

confidence: 99%

“…As is known [28], in the presence of the magnetic field superimposed on the field of mechanical deformations, at equilibrium, we have the following equation:…”

Section: Resultsmentioning

confidence: 99%

Section: Experimental Methods and Measurementsmentioning

confidence: 99%

—magnetic flux density vector,

—force vector, I —intensity of the electrical current.…”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations