Characterization of morphological and rheological properties of rigid magnetorheological foams via in situ fabrication method

Muhazeli, Noor Sahirah; Nordin, Nur Azmah; Mazlan, Saiful Amri; Norhaniza, Rizuan; Aziz, Siti Aishah Abdul; Fatah, Abdul Yasser Abd; Ibrahim, Zelina Zaiton; Ubaidillah, U.; Choi, Seung Bok

doi:10.1007/s10853-019-03842-9

Cited by 22 publications

(20 citation statements)

References 32 publications

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“…A material that can absorb and relay more sound waves than it reflects is considered a good sound-absorbing material. A few requirements of suitable sound-absorbing materials may need to be considered in order to minimize the noise generated; examples include porosity, weight, absorption ability, and range of frequency absorption [ 3 , 4 ]. These sound-absorbing materials are classified into three main groups: passive, active, and semi-active noise control materials [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, active noise control materials have been developed to enhance noise reduction at low-frequency levels (20–200 Hz) [ 3 , 17 , 18 ]. Nevertheless, from the middle- to high-frequency range (from 200 Hz to 6 kHz), active noise control materials are difficult to implement due to the difference in the phenomenon of sound propagation [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, few attempts have been made to develop semi-active noise control materials by utilizing filler particles; this step caters to the middle- to high-frequency range (from 200 Hz to 6 kHz) of sound absorption [ 24 , 25 ]. Magnetic fillers such as carbonyl iron particles (CIPs) that are reinforced in an absorbent foam matrix are a great candidate to provide a semi-active attenuation material; these particles manipulate magnetic field sources during tunable sound absorption characterization [ 3 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…Plus, previous studies only reported on magnetic foams that were fabricated via ex situ processes [ 21 , 27 ], whereas in the present study, MR foam materials were fabricated via an in situ method. In situ MR foam production involves internally combining magnetic particles with an absorbent matrix medium, whereas the ex situ method involves externally incorporating the mixture of magnetic particles and suspension medium (such as fluid, elastomer, or plastomer) into the ready foam [ 3 , 28 ]. Compared to the ex situ method, which requires additional manufacturing steps and creates an issue of agglomerated magnetic particles in a porous, absorbent polymeric foam matrix, in situ fabrication contributes to the homogeneous distribution of magnetic particles and creates stronger bonding between magnetic particles and the porous, absorbent MR foam matrix.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

et al. 2020

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Conventional polyurethane foam has non-tunable sound absorption properties. Here, a magneto-induced foam, called magnetorheological (MR) foam, was fabricated with the feature of being able to tune sound absorption properties, primarily from the middle- to higher-frequency ranges. Three different samples of MR foams were fabricated in situ by varying the concentration of Carbonyl Iron Particles (CIPs) (0, 35, and 75 wt.%). The magnetization properties and tunable sound absorption characteristics were evaluated. From the magnetic saturation properties, the results showed very narrow and small coercivity of hysteresis loops relative to the soft magnetic properties of the CIPs. MR foam with 75 wt.% CIPs showed a higher magnetic saturation at 91.350 emu/g compared to MR foam with 35 wt.% CIPs at 63.896 emu/g. For tunable sound absorption testing, the effect of ‘shifting’ to higher frequency was also observed when the magnetic field was applied, which was ~10 Hz for MR foam with 35 wt.% CIPs and ~130 Hz for MR foam with 75 wt.% CIPs. As the latest evolution of semi-active noise control materials, the results from this study are valuable guidance for the advancement of MR-based devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

et al. 2020

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“…In this article, the author will consider the structures and properties of MR materials that allow them to be used in soft robots. Among materials other than MR foam [8], MR fluids and MR elastomers can be distinguished. These materials have properties that allow them to be used in various controllable application areas.…”

Section: Introductionmentioning

confidence: 99%

State of the art of soft robotic applications based on magneto-rheological materials

Gutenko

2020

MATEC Web Conf.

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Soft robotics is a new and exciting field of robotics which heavily relies on compliant materials. Soft robots attempt to copy the motion of living organisms and their adaptation mechanisms to the environment. New efforts in this field have paved way for the use of specific materials, e.g. electroactive polymers and/or magnetoactive (magnetorheological) MR elastomers. In this paper the author discusses the fundamental characteristics of MR fluids and elastomers, that allow them to be used as elements/components of soft robots. The advantages of using soft robots and the scope of applications for such robots are presented. The advantages and disadvantages of using MR fluids and elastomers in such soft robots are also considered. The history of the development of the idea of using MR fluids and elastomers in soft robots is presented, too. Possible applications for soft robots based on MR fluids and elastomers are considered. Various solutions for constructing a robotic gripper using MR fluids and elastomers are presented. Based on the above solutions, an analysis is made of the development of such technologies and the main problems are identified that will be the goal of solving them in the near future.

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Effect of Different Curing Conditions on the Morphological and Rheological Properties of Rigid Magnetorheological Foam

Muhazeli

Aziz

Nordin

et al. 2020

Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials

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Characterization of morphological and rheological properties of rigid magnetorheological foams via in situ fabrication method

Cited by 22 publications

References 32 publications

Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

Magnetic and Tunable Sound Absorption Properties of an In-Situ Prepared Magnetorheological Foam

State of the art of soft robotic applications based on magneto-rheological materials

Effect of Different Curing Conditions on the Morphological and Rheological Properties of Rigid Magnetorheological Foam

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