PDMS based electromagnetic actuator membrane with embedded magnetic particles in polymer composite

Said, Muzalifah Mohd; Yunas, Jumril; Pawinanto, Roer Eka; Majlis, Burhanuddin Yeop; Bais, Badariah

doi:10.1016/j.sna.2016.05.007

Cited by 57 publications

(35 citation statements)

References 19 publications

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“…Their development made it possible to introduce new opportunities in controlling magnetomechanical behavior of engineered composites and, therefore, expanded the area of their application in magnetoelectromechanics and mechatronics. [ 23–25 ] The overall pursuit of practical application of such materials highlighted the current agenda comprising investigation of their main physical properties and necessity of reliable models describing behavior of MAEs under a variety of magnetic fields and mechanical loads.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

Vaganov

Borin

Odenbach

et al. 2021

Advcd Theory and Sims

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A new model to describe magnetization of a magnetoactive elastomer (MAE) filled with magnetically hard powder is proposed. The magnetization process is treated as a result of a joint contribution of an assembly of single‐domain particles each of which dwells inside its own elastomer cavity. Magnetization of such a particle is a complex magnetomechanical process that combines intrinsic magnetization reversal and particle mechanical rotation. Possible slippage of the particles, in the course of which they disconnect from the matrix and, on their move, rub against the cavity wall, is explicitly taken into account. The influence of the slippage effect on the macroscopic magnetization of the composite is analyzed by means of computer simulation. Occurrence of asymmetrical magnetization loops of single‐domain particles located in an elastic medium is demonstrated. It is shown that by allowing for the slippage, it becomes possible to explain the experimentally observed anomalously low but non‐zero half‐width (coercivity) of the hysteresis loops of the MAE samples.

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Section: Introductionmentioning

confidence: 99%

Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

Vaganov

Borin

Odenbach

et al. 2021

Advcd Theory and Sims

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“…The magnetic property of the polymer composite was studied by analyzing the hysteresis curve using a vibration sample magnetometer (VSM). Figure 3 shows the hysteresis loop of synthesized PDMS:NdFeB at room temperature and with a magnetization of 1.2 T and a 6% mixture composition, found to be the optimum composition [ 26 ]. It can be seen that the magnetic property still exists in the magnetic composite material at different thicknesses.…”

Section: The Design and Fabrication Of Electromagnetic (Em) Electrmentioning

confidence: 99%

“…This is because the magnetic field produced by the double coil (0.63 mT) is the highest among all others. As stated in a previous report [ 26 ], the magnetic field generated by the planar electromagnetic coil will directly interact with the permanent magnet and hence produce a magnetic force that pushes and pulls the membrane, allowing for an improved pumping route. These results reflect that a lower membrane deflection will produce a low liquid flow rate.…”

Section: Fluid Flow Test Of Em Micropumpmentioning

confidence: 99%

The Design, Fabrication, and Testing of an Electromagnetic Micropump with a Matrix-Patterned Magnetic Polymer Composite Actuator Membrane

et al. 2017

Self Cite

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A valveless electromagnetic (EM) micropump with a matrix-patterned magnetic polymer composite actuator membrane structure was successfully designed and fabricated. The composite membrane structure is made of polydemethylsiloxane (PDMS) that is mixed with magnetic particles and patterned in matrix blocks. The matrix magnetic composite membrane was fabricated using a soft lithography process and expected to have a compact structure having sufficient magnetic force for membrane deformation and maintained membrane flexibility. The magnetic membrane was integrated with the microfluidic system and functionally tested. The experimental results show that a magnetic composite actuator membrane containing of 6% NdFeB is capable of producing a maximum membrane deflection up to 12.87 µm. The functionality test of the EM actuator for fluid pumping resulted in an extremely low sample injection flow rate of approximately 6.523 nL/min. It was also concluded that there is a correlation between the matrix structure of the actuator membrane and the fluid pumping flow rate. The injection flow rate of the EM micropump can be controlled by adjusting the input power supplied to the EM coil, and this is believed to improve the injection accuracy of the drug dosage and have potential in improving the proficiency of the existing drug delivery system.

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“…The benefits of microscale magnetic actuation have led to its implementation in a variety of MEMS and microfluidics devices, performing tasks such as wireless microfluidic mixing [ 21 ] and pumping of fluids [ 22 ]; in microrobotics, the use of magnetic force to provide wireless control and power is particularly appealing as it does not require the robots to be operated on a specialized surface and it can be used to perform complex three-dimensional motions [ 23 ]. Remotely-controlled microscale robots show potential in a variety of applications, including interaction with samples in lab-on-a-chip systems, navigation [ 16 ], in vivo delivery of cancer therapies, and performance of retinal- and neuro-surgical procedures [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Photopatternable Magnetic Hollowbots by Nd-Fe-B Nanocomposite for Potential Targeted Drug Delivery Applications

Chen

Zhang

et al. 2018

Micromachines

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In contrast to traditional drug administration, targeted drug delivery can prolong, localize, target and have a protected drug interaction with the diseased tissue. Drug delivery carriers, such as polymeric micelles, liposomes, dendrimers, nanotubes, and so on, are hard to scale-up, costly, and have short shelf life. Here we show the novel fabrication and characterization of photopatternable magnetic hollow microrobots that can potentially be utilized in microfluidics and drug delivery applications. These magnetic hollowbots can be fabricated using standard ultraviolet (UV) lithography with low cost and easily accessible equipment, which results in them being easy to scale up, and inexpensive to fabricate. Contact-free actuation of freestanding magnetic hollowbots were demonstrated by using an applied 900 G external magnetic field to achieve the movement control in an aqueous environment. According to the movement clip, the average speed of the magnetic hollowbots was estimated to be 1.9 mm/s.

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PDMS based electromagnetic actuator membrane with embedded magnetic particles in polymer composite

Cited by 57 publications

References 19 publications

Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

Magnetic Response of Magnetoactive Elastomers with Allowance for Slippage at the Particle‐Matrix Interfaces

The Design, Fabrication, and Testing of an Electromagnetic Micropump with a Matrix-Patterned Magnetic Polymer Composite Actuator Membrane

Photopatternable Magnetic Hollowbots by Nd-Fe-B Nanocomposite for Potential Targeted Drug Delivery Applications

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